The Dragon Archive - User contributions [en]

Dragon DOS

2014-10-29T10:37:24Z

Kenh: /* New developments */

== Dragon DOS 1.x ==

[[Dragon Data Ltd]] comissioned [[The Micro Works]] to write the original Dragon DOS, some pre-release examples of this including the (c) Micro Works signature can be found in the downloads area. Shortly after release a number of bugs were discovered in 1.0 and a number of articles were published in [[Dragon User]] with patches to the ROM code to correct the worst of these. The most common version is 1.0, it is not known if any other version was officially released although 1.7 has been seen but the source of 1.7 and the differences with 1.0 are unknown at this time.

== Dragon DOS 2.x ==

For the [[Dragon Alpha]] a modified version of Dragon DOS was required, one that would load into RAM from disk rather than exist on a ROM. [[Vivaway Ltd]] were given the source code for Dragon DOS 1.x and Dragon DOS 2.x was created. A VDK disk image of Dragon DOS V2.F for the [[Dragon Alpha]] can be found in the downloads area. From looking at segments of the original Dragon DOS 2.C source code it would appear that [[Vivaway Ltd]] implemented the changes as options so that the source code could be assembled for a Dragon ROM or RAM implementation - There is also an option that appears to infer it would also assemble to work on a Tandy CoCo.

== Dragon DOS 4.x ==

Eurohard wanted to release an updated Dragon DOS for the [[Dragon 64]] / [[Dragon 200]] that contained all the known bugfixes and to avoid confusion with the 2.x series numbering they jumped straight to V4.0. A ROM image of this is available for download.

== Dragon DOS Interface Pictures ==

<gallery caption="Dragon DOS Interface">
Image:DiskController_Box.jpg|Box
Image:DiskController_Top.jpg|Casing Top
Image:DiskController_Bottom.jpg|Casing Bottom
Image:DiskController_PCB_Top.jpg|PCB Top
Image:DiskController_PCB_Bottom.jpg| PCB Bottom
</gallery>

== Dragon DOS IC Parts List ==

'''DragonDOS Board IC list (with Datasheets)
{|{{PrettyTable|width: 700px; font-size: 2em;}}
|''Part Number''||''Description''||''Datasheet''
|-
| 2764 || 8Kb EPROM || [[Media:HN482764G.pdf|(pdf)]]
|-
| SN7416N || Hex inverter buffers/drivers with open-collector high-voltage outputs || [[Media:SN5406-SN5416-SN7406-SN7416.pdf|(pdf)]]
|-
| SN7417N || Hex buffers/drivers with open-collector high-voltage outputs || [[Media:SN5407-SN5417-SN7407-SN7417.pdf|(pdf)]]
|-
| SN74LS00N || Quad 2-input positive-NAND gates || [[Media:SN5400-SN54LS00-SN54S00-SN7400-SN74LS00-SN74S00.pdf|(pdf)]]
|-
| SN74LS04N || Hex inverters || [[Media:SN5404-SN54LS04-SN54S04-SN7404-SN74LS04-SN74S04.pdf|(pdf)]]
|-
| SN74LS74AN || DUAL D-TYPE POSITIVE EDGE-TRIGGERED FLIP-FLOPS WITH PRESET AND CLEAR || [[Media:SN54-74LS74N.pdf|(pdf)]]
|-
| SN74LS139N || DUAL 1-OF-4 DECODER/DEMULTIPLEXER || [[Media:SN54-74LS139.pdf|(pdf)]]
|-
| SN74LS174N || Hex/Quadruple D-Type Flip-Flops With Clear || [[Media:SN54174-SN54175-SN54LS174-SN54LS175-SN54S174-SN54S175-SN74174-SN74175-SN74LS174-SN74LS175-SN74S174-SN74S175.pdf|(pdf)]]
|-
| WD2797PL-02 || Floppy Disk Formatter/Controller || [[Media:WD279x-02.pdf|(pdf)]]
|-
|}
<br>

== New developments ==

Several people have created new versions of the DragonDOS controller, which use the same WD2797 floppy controller IC as the original controller but are smaller.

* Jose Leandro's Disk Controller (2012) Eagle Schematics:[[File:DragonDos_Controller_-_Jos%C3%A9_Leandro.zip]]
This one was created by Jose Leandro, a spanish Dragon user.

Full details (in spanish): http://hardware.speccy.org/temp/Dragon-1.html

<gallery caption="Jose Leandro's Dragon Disk Controller">
Image:DragonDOS_JoseLeandro_PCB_Top.jpg|PCB Top
Image:DragonDOS_JoseLeandro_PCB_Bottom.jpg|PCB Bottom
</gallery>
<br>

* Lafumat's Dragon Disk Controller (July 2012)

This one was created by Lafumat, an user of the spanish RetroWiki and Zona de Pruebas forums.

<gallery caption="Lafumat's Dragon Disk Controller">
Image:Lafumat_Disk_Controller-V1.1-PCB_Top.jpg|PCB Top
Image:Lafumat_Disk_Controller-V1.1-PCB_Bottom.jpg|PCB Bottom
</gallery>

== Dragon DOS Downloads ==
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Dragon%20Data%20Ltd%20-%20Dragon%20DOS%201.0%20-%20Pre-Release%201.zip Dragon DOS 1.0 - Pre-Release 1] (Zipped ROM file)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Dragon%20Data%20Ltd%20-%20Dragon%20DOS%201.0%20-%20Pre-Release%202.zip Dragon DOS 1.0 - Pre-Release 2] (Zipped ROM file)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Dragon%20Data%20Ltd%20-%20Dragon%20DOS%201.0%20-%20Pre-Release%201.zip Dragon DOS 1.0 - Pre-Release 3] (Zipped ROM file)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Dragon%20Data%20Ltd%20-%20Dragon%20DOS%201.0.zip Dragon DOS 1.0] (Zipped ROM File)
* [http://archive.worldofdragon.org/archive/index.php?dir=Disks/Dragon/&file=Dragon%20Data%20Ltd%20-%20Dragon%20Alpha%28Professional%29%20-%20DragonDos%202.F%20Boot.zip Dragon DOS 2.F] (Zipped Disk Image)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Eurohard%20S.A.%20-%20Dragon%20DOS%204.0.zip Dragon DOS 4.0] (Zipped ROM File)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Eurohard%20S.A.%20-%20Dragon%20DOS%204.1.zip Dragon DOS 4.1] (Zipped ROM file)

Dragon DOS

2014-10-29T09:05:42Z

Kenh: /* New developments */

== Dragon DOS 1.x ==

[[Dragon Data Ltd]] comissioned [[The Micro Works]] to write the original Dragon DOS, some pre-release examples of this including the (c) Micro Works signature can be found in the downloads area. Shortly after release a number of bugs were discovered in 1.0 and a number of articles were published in [[Dragon User]] with patches to the ROM code to correct the worst of these. The most common version is 1.0, it is not known if any other version was officially released although 1.7 has been seen but the source of 1.7 and the differences with 1.0 are unknown at this time.

== Dragon DOS 2.x ==

For the [[Dragon Alpha]] a modified version of Dragon DOS was required, one that would load into RAM from disk rather than exist on a ROM. [[Vivaway Ltd]] were given the source code for Dragon DOS 1.x and Dragon DOS 2.x was created. A VDK disk image of Dragon DOS V2.F for the [[Dragon Alpha]] can be found in the downloads area. From looking at segments of the original Dragon DOS 2.C source code it would appear that [[Vivaway Ltd]] implemented the changes as options so that the source code could be assembled for a Dragon ROM or RAM implementation - There is also an option that appears to infer it would also assemble to work on a Tandy CoCo.

== Dragon DOS 4.x ==

Eurohard wanted to release an updated Dragon DOS for the [[Dragon 64]] / [[Dragon 200]] that contained all the known bugfixes and to avoid confusion with the 2.x series numbering they jumped straight to V4.0. A ROM image of this is available for download.

== Dragon DOS Interface Pictures ==

<gallery caption="Dragon DOS Interface">
Image:DiskController_Box.jpg|Box
Image:DiskController_Top.jpg|Casing Top
Image:DiskController_Bottom.jpg|Casing Bottom
Image:DiskController_PCB_Top.jpg|PCB Top
Image:DiskController_PCB_Bottom.jpg| PCB Bottom
</gallery>

== Dragon DOS IC Parts List ==

'''DragonDOS Board IC list (with Datasheets)
{|{{PrettyTable|width: 700px; font-size: 2em;}}
|''Part Number''||''Description''||''Datasheet''
|-
| 2764 || 8Kb EPROM || [[Media:HN482764G.pdf|(pdf)]]
|-
| SN7416N || Hex inverter buffers/drivers with open-collector high-voltage outputs || [[Media:SN5406-SN5416-SN7406-SN7416.pdf|(pdf)]]
|-
| SN7417N || Hex buffers/drivers with open-collector high-voltage outputs || [[Media:SN5407-SN5417-SN7407-SN7417.pdf|(pdf)]]
|-
| SN74LS00N || Quad 2-input positive-NAND gates || [[Media:SN5400-SN54LS00-SN54S00-SN7400-SN74LS00-SN74S00.pdf|(pdf)]]
|-
| SN74LS04N || Hex inverters || [[Media:SN5404-SN54LS04-SN54S04-SN7404-SN74LS04-SN74S04.pdf|(pdf)]]
|-
| SN74LS74AN || DUAL D-TYPE POSITIVE EDGE-TRIGGERED FLIP-FLOPS WITH PRESET AND CLEAR || [[Media:SN54-74LS74N.pdf|(pdf)]]
|-
| SN74LS139N || DUAL 1-OF-4 DECODER/DEMULTIPLEXER || [[Media:SN54-74LS139.pdf|(pdf)]]
|-
| SN74LS174N || Hex/Quadruple D-Type Flip-Flops With Clear || [[Media:SN54174-SN54175-SN54LS174-SN54LS175-SN54S174-SN54S175-SN74174-SN74175-SN74LS174-SN74LS175-SN74S174-SN74S175.pdf|(pdf)]]
|-
| WD2797PL-02 || Floppy Disk Formatter/Controller || [[Media:WD279x-02.pdf|(pdf)]]
|-
|}
<br>

== New developments ==

Several people have created new versions of the DragonDOS controller, which use the same WD2797 floppy controller IC as the original controller but are smaller.

* Jose Leandro's Disk Controller (2012) Eagle Schematics:[[File:DragonDos_Controller_-_Jos%C3%A9_Leandro.zip]]
This one was created by Jose Leandro, a spanish Dragon user.

<gallery caption="Jose Leandro's Dragon Disk Controller">
Image:DragonDOS_JoseLeandro_PCB_Top.jpg|PCB Top
Image:DragonDOS_JoseLeandro_PCB_Bottom.jpg|PCB Bottom
</gallery>
<br>

* Lafumat's Dragon Disk Controller (July 2012)

This one was created by Lafumat, an user of the spanish RetroWiki and Zona de Pruebas forums.

<gallery caption="Lafumat's Dragon Disk Controller">
Image:Lafumat_Disk_Controller-V1.1-PCB_Top.jpg|PCB Top
Image:Lafumat_Disk_Controller-V1.1-PCB_Bottom.jpg|PCB Bottom
</gallery>

== Dragon DOS Downloads ==
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Dragon%20Data%20Ltd%20-%20Dragon%20DOS%201.0%20-%20Pre-Release%201.zip Dragon DOS 1.0 - Pre-Release 1] (Zipped ROM file)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Dragon%20Data%20Ltd%20-%20Dragon%20DOS%201.0%20-%20Pre-Release%202.zip Dragon DOS 1.0 - Pre-Release 2] (Zipped ROM file)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Dragon%20Data%20Ltd%20-%20Dragon%20DOS%201.0%20-%20Pre-Release%201.zip Dragon DOS 1.0 - Pre-Release 3] (Zipped ROM file)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Dragon%20Data%20Ltd%20-%20Dragon%20DOS%201.0.zip Dragon DOS 1.0] (Zipped ROM File)
* [http://archive.worldofdragon.org/archive/index.php?dir=Disks/Dragon/&file=Dragon%20Data%20Ltd%20-%20Dragon%20Alpha%28Professional%29%20-%20DragonDos%202.F%20Boot.zip Dragon DOS 2.F] (Zipped Disk Image)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Eurohard%20S.A.%20-%20Dragon%20DOS%204.0.zip Dragon DOS 4.0] (Zipped ROM File)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Eurohard%20S.A.%20-%20Dragon%20DOS%204.1.zip Dragon DOS 4.1] (Zipped ROM file)

File:DragonDos Controller - José Leandro.zip

2014-10-29T09:03:28Z

Kenh: Eagle files for José Leandro Novellón's Dragon Dos Controller Clone

Eagle files for José Leandro Novellón's Dragon Dos Controller Clone

DIY Projects

2014-03-10T21:48:37Z

Kenh: /* 6809 DIY construction kits */

The Dragon series of computers offers programming models and a cartridge expansion connector that are ideally suited to hardware hackers and hobbyist experimenters. Below, you can find a selection of projects that have been created by members of the Dragon community.

Click the item to learn more about it, buy one or download schematics and associated software (where applicable).

== Adapters & Cables ==
* [[Replacement power supply unit]]
* [[Dragon32/iPhone Bi-Directional Data Cable (Rink)]]
* [[Dragon 32/64 Drivewire Adapter]]

== Cartridges & Expansions ==
* [[Multicart by Prime (Phill Harvey-Smith)]]
* [[DragonMMC SDCard Interface by Prime (Phill Harvey-Smith)]]
* [[Dragon ROM/RAM Cartridge (Rink)]]
* [[Dragon I/O Cartridge (Rink)]]
* [[Dragon Multi Cartridge (Rolo)]]
* [[80 Column WordPak]] (CoCoDemus)

== 6809 DIY construction kits ==
Here a list of external DIY instructions to build a own 6809 based computer:

* [http://searle.hostei.com/grant/6809/Simple6809.html Grant's 6-chip 6809 computer]
* [http://www.msarnoff.org/projects/6809/ Ultim809: Homebrew 8-Bit Computer]
* [http://www.8bitforce.com/simon6809/ Simon 6809]
* [http://laurent68k.free.fr/Site/RedBoard6809.html HOMEBREW Computer 6809: RedBoard]

See also forums thread related to this list: http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=8&t=4338

DIY Projects

2014-03-10T09:18:30Z

Kenh: /* Cartridges & Expansions */

The Dragon series of computers offers programming models and a cartridge expansion connector that are ideally suited to hardware hackers and hobbyist experimenters. Below, you can find a selection of projects that have been created by members of the Dragon community.

Click the item to learn more about it, buy one or download schematics and associated software (where applicable).

== Adapters & Cables ==
* [[Replacement power supply unit]]
* [[Dragon32/iPhone Bi-Directional Data Cable (Rink)]]
* [[Dragon 32/64 Drivewire Adapter]]

== Cartridges & Expansions ==
* [[Multicart by Prime (Phill Harvey-Smith)]]
* [[DragonMMC SDCard Interface by Prime (Phill Harvey-Smith)]]
* [[Dragon ROM/RAM Cartridge (Rink)]]
* [[Dragon I/O Cartridge (Rink)]]
* [[Dragon Multi Cartridge (Rolo)]]
* [[80 Column WordPak]] (CoCoDemus)

== 6809 DIY construction kits ==
Here a list of external DIY instructions to build a own 6809 based computer:

* [http://searle.hostei.com/grant/6809/Simple6809.html| Grant's 6-chip 6809 computer]
* [http://www.msarnoff.org/projects/6809/| Ultim809: Homebrew 8-Bit Computer]
* [http://www.8bitforce.com/simon6809/| Simon 6809]
* [http://laurent68k.free.fr/Site/RedBoard6809.html| HOMEBREW Computer 6809: RedBoard]

See also forums thread related to this list: http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=8&t=4338

80 Column WordPak

2014-03-02T09:25:21Z

Kenh:

[[File:Wordpak.png|400px]]

http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=5&t=4782

File:Wordpak.png

2014-03-02T09:18:29Z

Kenh: WordPak 80 Column Board (CRT9128)

WordPak 80 Column Board (CRT9128)

80 Column WordPak

2014-03-01T18:51:55Z

Kenh: Created page with ' http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=5&t=4782'

http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=5&t=4782

DIY Projects

2014-03-01T18:50:53Z

Kenh: /* Cartridges & Expansions */ WordPak

The Dragon series of computers offers programming models and a cartridge expansion connector that are ideally suited to hardware hackers and hobbyist experimenters. Below, you can find a selection of projects that have been created by members of the Dragon community.

Click the item to learn more about it, buy one or download schematics and associated software (where applicable).

== Adapters & Cables ==
* [[Replacement power supply unit]]
* [[Dragon32/iPhone Bi-Directional Data Cable (Rink)]]
* [[Dragon 32/64 Drivewire Adapter]]

== Cartridges & Expansions ==
* [[Multicart by Prime (Phill Harvey-Smith)]]
* [[DragonMMC SDCard Interface by Prime (Phill Harvey-Smith)]]
* [[Dragon ROM/RAM Cartridge (Rink)]]
* [[Dragon I/O Cartridge (Rink)]]
* [[Dragon Multi Cartridge (Rolo)]]
* [[80 Column WordPak]]

== 6809 DIY construction kits ==
Here a list of external DIY instructions to build a own 6809 based computer:

* [http://searle.hostei.com/grant/6809/Simple6809.html| Grant's 6-chip 6809 computer]
* [http://www.msarnoff.org/projects/6809/| Ultim809: Homebrew 8-Bit Computer]
* [http://www.8bitforce.com/simon6809/| Simon 6809]
* [http://laurent68k.free.fr/Site/RedBoard6809.html| HOMEBREW Computer 6809: RedBoard]

See also forums thread related to this list: http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=8&t=4338

Dragon User

2013-10-06T07:24:26Z

Kenh: add index

== Index ==
[[Media:DragonUserIndex.pdf|Dragon User Magazine Index (pdf file)]]

== 1983 ==

<gallery>
Image:DU1983-05.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1983 May 83 - Issue 1]
Image:DU1983-06.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1983 June 83 - Issue 2]
Image:DU1983-07.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1983 July 83 - Issue 3]
Image:DU1983-08.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1983 August 83 - Issue 4]
Image:DU1983-09.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1983 September 83 - Issue 5]
Image:DU1983-10.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1983 October 83 - Issue 6]
Image:DU1983-11.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1983 November 83 - Issue 7]
Image:DU1983-12.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1983 December 83 - Issue 8]
</gallery>

== 1984 ==

<gallery>
Image:DU1984-01.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 January 84 - Issue 9]
Image:DU1984-02.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 Febuary 84 - Issue 10]
Image:DU1984-03.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 March 84 - Issue 11]
Image:DU1984-04.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 April 84 - Issue 12]
Image:DU1984-05.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 May 84 - Issue 13]
Image:DU1984-06.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 June 84 - Issue 14]
Image:DU1984-07.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 July 84 - Issue 15]
Image:DU1984-08.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 August 84 - Issue 16]
Image:DU1984-09.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 September 84 - Issue 17]
Image:DU1984-10.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 October 84 - Issue 18]
Image:DU1984-11.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 November 84 - Issue 19]
Image:DU1984-12.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1984 December 84 - Issue 20]
</gallery>

== 1985 ==

<gallery>
Image:DU1985-01.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 January 85 - Issue 21]
Image:DU1985-02.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 Febuary 85 - Issue 22]
Image:DU1985-03.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 March 85 - Issue 23]
Image:DU1985-04.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 April 85 - Issue 24]
Image:DU1985-05.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 May 85 - Issue 25]
Image:DU1985-06.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 June 85 - Issue 26]
Image:DU1985-07.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 July 85 - Issue 27]
Image:DU1985-08.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 August 85 - Issue 28]
Image:DU1985-09.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 September 85 - Issue 29]
Image:DU1985-10.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 October 85 - Issue 30]
Image:DU1985-11.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 November 85 - Issue 31]
Image:DU1985-12.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1985 December 85 - Issue 32]
</gallery>

== 1986 ==

<gallery>
Image:DU1986-01.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 January 86 - Issue 33]
Image:DU1986-02.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 Febuary 86 - Issue 34]
Image:DU1986-03.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 March 86 - Issue 35]
Image:DU1986-04.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 April 86 - Issue 36]
Image:DU1986-05.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 May 86 - Issue 37]
Image:DU1986-06.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 June 86 - Issue 38]
Image:DU1986-07.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 July 86 - Issue 39]
Image:DU1986-08.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 August 86 - Issue 40]
Image:DU1986-09.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 September 86 - Issue 41]
Image:DU1986-10.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 October 86 - Issue 42]
Image:DU1986-11.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 November 86 - Issue 43]
Image:DU1986-12.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1986 December 86 - Issue 44]
</gallery>

== 1987 ==

<gallery>
Image:DU1987-01.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 January 87 - Issue 45]
Image:DU1987-02.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 Febuary 87 - Issue 46]
Image:DU1987-03.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 March 87 - Issue 47]
Image:DU1987-04.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 April 87 - Issue 48]
Image:DU1987-05.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 May 87 - Issue 49]
Image:DU1987-06.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 June 87 - Issue 50]
Image:DU1987-07.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 July 87 - Issue 51]
Image:DU1987-08.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 August 87 - Issue 52]
Image:DU1987-09.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 September 87 - Issue 53]
Image:DU1987-10.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 October 87 - Issue 54]
Image:DU1987-11.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 November 87 - Issue 55]
Image:DU1987-12.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1987 December 87 - Issue 56]
</gallery>

== 1988 ==

<gallery>
Image:DU1988-01.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 January 88 - Issue 57]
Image:DU1988-02.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 Febuary 88 - Issue 58]
Image:DU1988-03.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 March 88 - Issue 59]
Image:DU1988-04.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 April 88 - Issue 60]
Image:DU1988-05.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 May 88 - Issue 61]
Image:DU1988-06.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 June 88 - Issue 62]
Image:DU1988-07.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 July 88 - Issue 63]
Image:DU1988-08.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 August 88 - Issue 64]
Image:DU1988-09.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 September 88 - Issue 65]
Image:DU1988-10.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 October 88 - Issue 66]
Image:DU1988-11.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 November 88 - Issue 67]
Image:DU1988-12.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1988 December 88 - Issue 68]
</gallery>

== 1989 ==

<gallery>
Image:DU1989-01.jpg|[http://archive.worldofdragon.org/archive/index.php?dir=Magazines/Dragon%20User/1989 January 89 - Issue 69]
</gallery>

File:DragonUserIndex.pdf

2013-10-06T07:18:13Z

Kenh: Dragon User magazine searchable index

Dragon User magazine searchable index

Dragon 200

2013-09-12T08:49:59Z

Kenh: /* Dragon 200 */

== Dragon 200 ==

[[File:Dragon200.jpg|right|thumb|Dragon 200]]
[[File:Dragon200Box.jpg|right|thumb|Dragon 200 Box]]
[[File:Dragon200ad.jpg|right|thumb|Dragon 200]]
The Dragon 200 is functionally and technically the same as a [[Dragon 64]]. The differences between the two are purely cosmetic with the new owners ([[Eurohard SA]]) changing the branding and look of the Dragon. The Dragon 200 was very successful in Spain and was introduced to many eduational channels.

== Dragon 100 ==

Mentioned several times in Dragon User the Dragon 100 was a Spanish market only machine, probably based on the Dragon 32. Nobody has been able to confirm if these ever existed.

== Dragon 200E ==

There are rumours, but as yet no evidence, that an expanded version called the Dragon 200E was produced, this was supposed to contain an 80-column display card and may have been similar in specification to the Compusense [[Dragon Plus]] add-on.

== Dragon 300 ==

Again, several mentions in Dragon User but no evidence that it even got to prototype stage - This was supposed to be something similar to the Dragon Alpha/Professional which Eurohard had decided not to continue with and instead concentrated on a Dragon MSX machine.

File:Dragon200ad.jpg

2013-09-12T08:48:57Z

Kenh: Dragon 200 Ad

Dragon 200 Ad

File:Dragon200.jpg

2013-09-12T08:48:04Z

Kenh: uploaded a new version of "File:Dragon200.jpg": Reverted to version as of 21:47, 15 March 2009

File:Dragon200.jpg

2013-09-12T08:47:53Z

Kenh: uploaded a new version of "File:Dragon200.jpg": Dragon 200 Ad

Dragon Plus

2013-09-12T08:41:17Z

Kenh:

The Dragon Plus was an add-inboard for the Dragon 32 or 64. It provided an additional 64KB of RAM and an 80 column text mode driven by an MC6845 with its own 2KB buffer. The board plugged into the SAM socket on the motherboard, with the SAM being placed on the Dragon Plus board and also required one of the BASIC roms to be moved to the Dragon Plus board with a ribbon cable plugging into the vacated socket. The 80 column display required an additional monitor socket to be provided on the Dragon case as this used its own composite video output circuit.

There was also an IDE interface planned to allow connection of a hard disk drive - the 40-pin header for the IDE interface can be seen on the Dragon Plus circuit board, along with what appears to be space for a missing IC.

A special version of Edit+ was available, along with drvers for OS-9 Level 1 and a special version of Flex. Both the OS-9 and Flex implementations used the additional 64KB as a RAM disk so the main OS ran completely from RAM, thus speeding up operating and allowing disk 0 to be changed. Both OS-9 and Flex also supported the use of the 80 column display.

[[File:Dragonplus.jpg]]

File:Dragonplus.jpg

2013-09-12T08:39:06Z

Kenh: Dragon Plus Ad

Dragon Plus Ad

Dragon 32/64 Drivewire Adapter

2013-09-03T07:26:10Z

Kenh:

[[File:Drivewire.jpg]]‎

See DIY instructions [http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=5&t=781 in this post]

or buy a [http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=6&t=4270 tormod's Drivewire Adapter]

See also: [[Drivewire_for_dummies]]

Drivewire for dummies

2013-09-03T07:25:15Z

Kenh: Created page with 'Drivewire for Dummies - by Robert Hermanek (originally posted on the coco list) == Drivewire for Dummies - Part 1 == Background: Once upon a time, if you were lucky you had...'

Drivewire for Dummies - by Robert Hermanek
(originally posted on the coco list)

== Drivewire for Dummies - Part 1 ==

Background: Once upon a time, if you were lucky you had a color computer with a disk controller. (If not, you were biting your nails hoping your cassettes loaded.) If you had a disk system, then you could have up to 4 drives, and they were labelled drives 0 through 3, and you selected which disk drive you wanted to use with the drive command:

DRIVE n

Each of these four physical 5 1/4 floppies would store approximately 160k of data. Back in the day, this was pretty huge. Although disks were more reliable and much faster than cassette, disk failures or directory crashes were still quite common.

After the floppy era, hard drives started making an appearance. Harddrives are orders of magnitude larger (megs vs. kilobytes) however for usage in disk extended basic on a color computer, these larger devices would still have to be presented as "virtual floppies" of 160k each, so that a massive rewrite of DECB (disk extended color basic) would not be necessary, and also to avoid incompatibilities with old software.

HDB-DOS appeared on the scene eventually in order to facilitate connecting to a hard drive from DECB and getting access to your new space in friendly 160k virtual disks.

Next, some very clever folks (insert list of all the geniuses involved here) came up with "DriveWire." For the coco, it still comes down to be connected to some large "device." But in fact all read/write disk requests are redirected out the rs-232 port, and a server application on the far side (on a modern PC) will respond to the request and send data back to the coco. The coco sees this data as the response of a sector read (for example) from a floppy disk, just like back in the day when it was connected to actual coco disk drives via a disk controller.

For drivewire to work then, there are four things you need:
# a coco running HDB-DOS
# a cable connecting rs-232 to serial port on PC
# a drivewire server application running on the PC
# a disk image mounted and ready in the drivewire server app.

Now a little discussion of disk images, and people can correct me if I'm wrong.

Once, disk images (files with a DSK extension) were just a handy way of storing the data on a 35 track standard coco disk, so again about a 160k file. This file simply contains each track, each sector, in order, and the 256 bytes that make up each sector.

For the purpose of drivewire however, these DSK images started being placed in collections, since we didn't want to just work with one virtual floppy, but many virtual floppies.

Going back to the coco running HDB-DOS, there are now two commands for selecting which drive you want to access:

DRIVE n

This is the same command I mentioned above, and it will choose which virtual disk you want to use on the currently selected device. Now for original coco's running a disk controller, there was no talk of what device you wanted to access--you were accessing your disk controller, and if you were lucky you had more than one drive connected to it. You could then say DRIVE 0 or DRIVE 3 to access your disks.

When connecting to scsi devices came about, a new command was added:

DRIVE #n

Yes, looks the same except for the # symbol. This command selects which device you want to access. For example, if you had a scsi controller connected to your coco, with 2 physical harddrives attached, each of these harddrives would contain their own collections of virtual floppy disks. So all of the following are possible:

DRIVE #0
DRIVE 0 - first virtual disk on device 0
DRIVE 1 - next virutal disk on device 0
(etc)

DRIVE #1
DRIVE 0 - first virtual disk on device 1
DRIVE 1 - next virtual disk on device 1

(etc)

Now we get our sites back on drivewire, and here is what we come up with:

1) When you use the DRIVE #n command, you are selecting the "device," but for drivewire this simply means which source file (collection) of virtual floppies you wish to use. This collection is a single file (like a single physical harddrive back in the day) that contains, one after another, virtual floppy disk images.

2) When you use the DRIVE n command, you are choosing which virtual floppy on the currently selected collection you wish to use.

3) The real bonus: Back in the day with physical devices, you were limited to how many devices and disks you had by what you really had--in drivewire there is no limit other than the device and disk #'s have to be a byte value. That means you can select any device # 0 - 255 (DW4 server), and any drive # 0 to 255 on each device. 256 X 256 = 65,536 virtual disks that can be accessed by a coco connected to a drivewire server. That's a whole bunch of space!

So a final summary is:

# Get HDB-DOS running on coco, get server running on PC, get connected with a cable. (we'll get the specifics of the cable soon)
# In the server application, choose as many disk collections (that will be seen as "devices" in HDB-DOS) mounted as you would like.
# Select your current collection from the coco using the DRIVE #n command, and then choose your current virtual floppy disk using the DRIVE n command.

== Drivewire for Dummies - Part 2 - The Cable ==

Dragon Adapter
[[Dragon_32/64_Drivewire_Adapter]]

or

CoCo Drivewire Cable
http://www.mediafire.com/?c91gj67kw7q6yzu (CoCo DriveWire Serial Cable
pin-out diagrams)

== Drivewire for Dummies - Part 3 - Chicken and Egg ==

All the previous explanation assumes that you have HDB-DOS running on your coco. So how do you get it running on your coco?

1) If you have a disk system, you can get or create a physical disk that contains the HDB-DOS program. This includes a loader that basically gets HDB-DOS into RAM, then pulls the rug out from under DECB and replaces it with HDB-DOS. From then on you are accessing virtual disks through your rs-232 port instead of real disks through your controller cartridge.

There have been .DSK images posted here, that if restored to a physical floppy, would give you a nice HDB-DOS loader disk. However if you do not have drivewire already running, it can be pretty difficult to get the .DSK copied to a real floppy. There are PC utilities that can do this, assuming you have properly configured floppy drives on your PC (I've never gotten this to work myself.) Your best bet might be to have someone you know help you out and mail you a disk. Otherwise, does anyone know if you can still get a HDB-DOS disk from cloud9tech? That would be a valuable service I think...

2) You can load HDB-DOS loader from cassette. Now, you don't have to use an actual tape -- if you have a .WAV file on your PC that contains all the screeching and wailing we all know and love from our younger days, you can get the audio out on your PC connected to the audio in on your coco, then hit play on your .WAV file and "load" it into your coco. Or, you could play the .WAV onto an actual tape recorder if you wanted to load from a physical cassette. I feel like someone recently successfully loaded HDB-DOS using a .WAV file, if so, please reply directly to me with your audio file if you are willing--I'd like to test it myself, keep it on hand, and possibly help other drivewire newbies in the future...

3) You can burn an eprom with hdb-dos and place it in a cartridge so that it loads on boot. This is by far the most elegant, but also the most technically challenging. How to burn and install ROM images is a subject all its own, and I'm afraid I do not know enough about it. Again, cloud9tech will help you out, they did me!

== Drivewire for Dummies - Part 4 - DRIVE #n vs. DRIVE n ==

When it comes to daily usage, the most initially confusing thing about drivewire I think is all this talk of "devices" versus "disks," and sometimes other terms are used. I'm not really sure what the best approach is to clarify this, but I'll take a shot at it...

First, it is unfortunate perhaps that we did not choose a different file extension for files that are collections of images, as opposed to a single image. If you have a .DSK file that contains a single image, this is what you will have (in terms of DECB)

35 tracks X 18 sectors X 256 bytes per sector = 161,280 bytes, or approximately a 160k file.

For the purposes of drivewire however, when you mount a .DSK file as DRIVE #0 for example (in the slot for device 0), this .DSK file is actually a collection of images, and as I mentioned before, perhaps we should have chosen a different file extension such as ".DEV" for "device" or "DWD" for drivewire disks (or something.) Regardless, this file is simple, and is just virtual disk images lined up one after another. The server application figures out what offset is necessary to find the right data.

An example: Let's say you mount file "MyUtils.DSK" in slot 0 on drivewire server, and "MyGames.DSK" in slot 1 on drivewire server. Then the following HDB-DOS commands on your coco will perform these functions:

DRIVE #0
-- selects MyUtils.DSK

DRIVE 0
-- will access first 160k disk, data starting at byte 1 through byte 161,280.

DRIVE 1
-- will access second disk, data starting at byte 161,281 through byte 322,560

DRIVE 2
-- will access third disk, data starting at byte 322,561 through byte 483,840

To access your games...

DRIVE #1
-- selects MyGames.DSK

Now, the DRIVE 0 command mentioned above will not give you access to the first disk on your Utils collection, but instead the first disk in your Games collection.

In the new Drivewire 4 server applicaiton, it sounds like all these mappings can be changed as needed, but for this discussion I'm just assuming that DRIVE 0 through DRIVE 255 on the coco are mapped in the same order into a corresponding file on the server side.

This is basically all you need to know about drivewire to access data from your PC... When I have a little more time, I'll try to list the commands for some of the more common things people do with Drivewire.

Dragon 32/64 Drivewire Adapter

2013-08-26T18:54:08Z

Kenh:

File:Drivewire.jpg

2013-08-26T18:52:12Z

Kenh: tormod's Drivewire adapter

tormod's Drivewire adapter

Dragon 32/64 Drivewire Adapter

2013-08-26T13:52:39Z

Kenh: Created page with 'See DIY instructions [http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=5&t=781 in this post] or buy a [http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=6&t=4270 to...'

See DIY instructions [http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=5&t=781 in this post]

or buy a [http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=6&t=4270 tormod's Drivewire Adapter]

DIY Projects

2013-08-26T13:47:37Z

Kenh: /* Adapters & Cables */