Search found 266 matches

by prime
Tue Jun 08, 2021 11:44 am
Forum: Discuss This Site
Topic: Dragon Quicks
Replies: 8
Views: 15683

Re: Dragon Quicks

Cheers all that seems to be helpfull.

I have found that adding -timeout 30 is handy for games like "Screaming Abdabs" that don't turn off the tape once they finish loading!

Cheers.

Phill.
by prime
Tue Jun 08, 2021 10:16 am
Forum: Dragon General
Topic: xroar rompath
Replies: 1
Views: 3662

xroar rompath

Hi all, I'm having problems getting the rompath command line parameter to work.... I have the windows version of xroar (and thge roms) installled in : G:\Emulate\xroar\xroar-0.36.2-w64 If I change to that directory and run xroar (either from windows explorer, or from a cmd window), everything works ...
by prime
Mon Jun 07, 2021 11:28 pm
Forum: Discuss This Site
Topic: Dragon Quicks
Replies: 8
Views: 15683

Dragon Quicks

Hi all,

Is there a version of the Dragon quickstart archive that contains the same content as the Android phone / wav archive but in *CAS* format. This would be idela for DragonMMC as it can fastload CAS files.

Failing that is there an automated way to convert WAV->CAS?

Cheers.

Phill.
by prime
Sun May 30, 2021 10:55 pm
Forum: Dragon Hardware
Topic: Dragon expansions - FF00 page ports
Replies: 8
Views: 8592

Re: Dragon expansions - FF00 page ports

DragonMMC used locations All in $FF50-$FF5F $FF50 D_CMD_REG Command / Result $FF51 D_LATCH_REG Latch (single byte parameters). $FF52 D_READ_DATA_REG Read data $FF53 D_WRITE_DATA_REG Write data $FF54 D_STATUS_REG AVR status $FF55 D_PIA_MAP PIA redirect (write only) $FF56 D_RAM_CTRL RAM / ROM control ...
by prime
Tue May 18, 2021 11:00 pm
Forum: Dragon Hardware
Topic: Dragon to CoCo
Replies: 10
Views: 10628

Re: Dragon to CoCo

To clarify on DragonMMC : On the Dragon (or DraCo in Dragon mode). Load Dragon basic file however you want to load it (From real tape, cas file, disk file etc). Convert from Dragon to CoCo Tokens : MRETOKC Save the converted basic program direct to the SD card : MSAVE"filename" The move the DragonMM...
by prime
Sun May 09, 2021 9:32 pm
Forum: Dragon General
Topic: DRAM data retention time
Replies: 20
Views: 44651

Re: DRAM data retention time

I keep wondering about using SRAM for a memory upgrade after all 512K RAMs can be had pretty cheap nowadays, and you don't have the problem with refresh. However you would have to demux the Z0..Z7 lines from the SAM, and cope with the fact that the Dragon & CoCo designs rely on the fact that general...
by prime
Fri Jan 29, 2021 10:22 am
Forum: Dragon General
Topic: OS9
Replies: 0
Views: 9027

OS9

Hi all, Was the disk with the modules that would allow a custom OS-9 install ever released? What I'm looking to do is build a custom OS-9 boot disk with some updated / changed modules (specifically disk and clock). Yes I know about Nitros9, but I'd also like to backport my work to "official" Dragon ...
by prime
Sat Dec 19, 2020 10:50 am
Forum: Dragon Hardware
Topic: Dragon Beta
Replies: 7
Views: 9874

Re: Dragon Beta

Are both CPU's really running code from the ROM at the same time? Wouldn't that cause conflicts on the data bus? Is CPU#1 ever HALTed? The current code has a comment saying FIRQ goes to both processors, confirmed by your notes, but the old working emulation never seemed to do this. I'll see if I ca...
by prime
Thu Dec 17, 2020 6:16 pm
Forum: Dragon General
Topic: Comparison of Dragon mass storage options
Replies: 16
Views: 25238

Re: Comparison of Dragon mass storage options

Does the Dragon MMC come with a case ever, or will I have to make one from Lego? I've uploaded the source for the DragonMMC firmware to my github repository here : https://github.com/prime6809/DragonMMC There is a folder with the FreeCAD source and generated STL files that will allow you to 3d prin...
by prime
Thu Dec 17, 2020 6:06 pm
Forum: Dragon Hardware
Topic: Dragon Beta
Replies: 7
Views: 9874

Re: Dragon Beta

The emulation of the Beta last worked in MESS 0.138, which was 10 years ago! The MAME framework has advanced significantly since then but the Beta driver has been left to rot. I'd really like to get the Beta emulation working again, but will require more or less a rewrite to make use of the latest ...