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by zephyr
Mon Jun 09, 2014 4:32 pm
Forum: Uploads
Topic: Bin2Cas for Windows
Replies: 8
Views: 5668

Bin2Cas for Windows

Here's a Windows compile of Ciaran's bin2cas utility. Enter "bin2cas --help" to view the following text from the command line. usage: bin2cas OPTION... input-file bin2cas --blocks TYPE:LENGTH[,TYPE:LENGTH]... input-file Generate a cassette image from binary input. -D input file is a DragonDOS binary...
by zephyr
Sun Jun 08, 2014 1:17 pm
Forum: Dragon General
Topic: Dragon 64 repair - a little help?
Replies: 15
Views: 11056

Re: Dragon 64 repair - a little help?

Both SAM and CPU chips are currently available via eBay. http://www.ebay.co.uk/itm/MC6883P-Integrated-Circuit-x-1-pieces-/160937653305?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2578a1b439 http://www.ebay.co.uk/itm/68B09EP-Integrated-Circuit-x-1-pieces-/400360829436?pt=UK_BOI_Electrical_Co...
by zephyr
Sun Jun 08, 2014 11:41 am
Forum: Dragon General
Topic: Dragon 64 repair - a little help?
Replies: 15
Views: 11056

Re: Dragon 64 repair - a little help?

I don't know of anyone who could repair it for you. I can only suggest that you try changing the SAM (MC6883/SN74LS783) chip, followed by the CPU (MC6809E) and VDG (MC6847) chips if SAM chip swap doesn't fix the problem. The SAM and CPU chips should be quite easy to replace because they are usually ...
by zephyr
Sat Jun 07, 2014 2:44 pm
Forum: Hints and Tips
Topic: File Formats
Replies: 21
Views: 16869

Re: File Formats

Done it...

Code: Select all

drbincas testraw.bin testraw 16384 16384

DrBinCas v0.4b | Program for converting binary files to .CAS files by Robcfg
----------------------------------------------------------------------------

Code: Select all

cas2wav testraw.cas testraw.wav
by zephyr
Sat Jun 07, 2014 2:28 pm
Forum: Hints and Tips
Topic: File Formats
Replies: 21
Views: 16869

Re: File Formats

Bosco wrote:Can you make a working CAS from my raw file?
What are the START and EXEC addresses of your Dragon program?
by zephyr
Sat Jun 07, 2014 12:49 pm
Forum: Hints and Tips
Topic: File Formats
Replies: 21
Views: 16869

Re: File Formats

You can convert raw binaries to CAS files with robcfg's DrBinCas utility.
viewtopic.php?f=8&t=348&hilit=drbincas

Convert CAS files to Wave files with Ciaran's (sixxie) cas2wav utility.
viewtopic.php?f=7&t=354
by zephyr
Sat Jun 07, 2014 11:00 am
Forum: Hints and Tips
Topic: Loading another BASIC in RAM (MAP1)
Replies: 9
Views: 7009

Re: Loading another BASIC in RAM (MAP1)

tormod wrote:Maybe the Woolham's enhanced BASIC has other code at this location, but I don't know anything about that.
Its exactly the same code.
by zephyr
Sat Jun 07, 2014 10:47 am
Forum: Hints and Tips
Topic: Loading another BASIC in RAM (MAP1)
Replies: 9
Views: 7009

Re: Loading another BASIC in RAM (MAP1)

I will try to understand it tomorrow ... I knew about $B3CA because I used it, after an Steve's advice to go back to ROM mode from RAM where another different D.O.S. had been installed. But I didn't know that trick on $BB72. On enhanced Basic, this change produces JMP <$A7 to the charget routine, b...
by zephyr
Fri Jun 06, 2014 11:58 pm
Forum: Hints and Tips
Topic: Loading another BASIC in RAM (MAP1)
Replies: 9
Views: 7009

Re: Loading another BASIC in RAM (MAP1)

Try the following code. ORG $1800 PUT $1800 * ORCC #$50 STA $FFDF LDX #$2000 LDU #$8000 LOOP1 LDD ,X++ STD ,U++ CMPX #$7FFF BLO LOOP1 LDA #$0E STA $BB72 LDX #$B3CA LDD #$120C LOOP2 STA ,X+ DECB BNE LOOP2 LDA #$8E STA ,X+ LDD #$7FFE STD ,X CLR <$71 JMP $B3B4
by zephyr
Fri Jun 06, 2014 2:49 pm
Forum: Dragon General
Topic: DIY: 80 column WordPak board (CRT9128)
Replies: 50
Views: 37749

Re: DIY: 80 column WordPak board (CRT9128)

By now it uses 2 bytes for the controller address, one for the TV signal type and one for the cursor, so 4 bytes. In the event we add two more for the margins, we could use 6 bytes in the range $F7-$FF despite I am sure that many programmers do the same when fixed ram bytes are needed. Those bytes ...

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