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by Alastair
Thu Oct 03, 2013 11:20 pm
Forum: Hints and Tips
Topic: Howto try small machine code programs in BASIC ?
Replies: 53
Views: 26778

Re: Howto try small machine code programs in BASIC ?

Code: Select all

LDA #$12
LDB #$34
STA $600
STB $601
LDD $600
JSR 38266
Works in DASM too.
by Alastair
Thu Oct 03, 2013 10:47 pm
Forum: Dragon General
Topic: Comparison of Dragon Assemblers?
Replies: 14
Views: 8013

Re: Comparison of Dragon Assemblers?

jedie wrote:btw. must a assembler be "Dragon" specific or must it only 6809 specific?
If it runs on a Dragon it better not be CoCo specific :D (though it is possible to have assemblers that run on both the Dragon and CoCo).
by Alastair
Thu Oct 03, 2013 10:10 pm
Forum: Dragon General
Topic: Comparison of Dragon Assemblers?
Replies: 14
Views: 8013

Comparison of Dragon Assemblers?

Were any articles published that compared the various Dragon assembler packages? And if so, where were they published?
by Alastair
Tue Oct 01, 2013 11:38 pm
Forum: Hints and Tips
Topic: Howto try small machine code programs in BASIC ?
Replies: 53
Views: 26778

Re: Howto try small machine code programs in BASIC ?

The text screen starts at address $400 and ends at address $5FF, so any STA instruction to any address within that range (inclusive) will print the contents A to the screen. Try the following which should output all 256 text mode characters near the middle of the screen, you may omit the delay loop ...
by Alastair
Mon Sep 30, 2013 11:58 pm
Forum: Dragon General
Topic: Dragon Mythbusters: The Dragon 200E!
Replies: 61
Views: 26367

Re: Dragon Mythbusters: The Dragon 200E!

robcfg wrote:It's possible that the 200E PCB scans appear black, that is because of an issue with the thumbnail renderer.
I have not tested this but could this be due to the images being progressive jpegs?
by Alastair
Mon Sep 30, 2013 11:56 pm
Forum: Dragon General
Topic: XRoar 0.30 released
Replies: 47
Views: 22386

Re: XRoar 0.30 released

jedie wrote:Now, i first see XRoar under linux. It has a menu! Cool. Didn't see it until yet.
What a pity that's not available on windows.
The GTK+ version does, though you will also need the GTK+ libraries.
by Alastair
Sat Sep 21, 2013 10:52 pm
Forum: Dragon General
Topic: XRoar 0.30 released
Replies: 47
Views: 22386

Re: XRoar 0.30 released

The LLIST bug still pops up. When I get the time I will do some more thorough testing to find out when it occurs as it isn't obvious as to what actions are causing it. I think I found it - the way BUSY was being updated wasn't surviving across machine reconfigurations. Pushed out version 0.30.2! Th...
by Alastair
Fri Sep 20, 2013 11:41 pm
Forum: Hints and Tips
Topic: 6809 opcode missmatch...
Replies: 9
Views: 5955

Re: 6809 opcode missmatch...

If you don't have a copy of the "MC6809 Microprocessor Instruction Set Summary" card (where it's shown as "60 NEG INDEXED 6 2") you can download a copy from the forum.
by Alastair
Fri Sep 20, 2013 11:41 pm
Forum: Dragon General
Topic: XRoar 0.30 released
Replies: 47
Views: 22386

Re: XRoar 0.30 released

The LLIST bug still pops up. When I get the time I will do some more thorough testing to find out when it occurs as it isn't obvious as to what actions are causing it.
by Alastair
Thu Sep 19, 2013 11:56 pm
Forum: Software Requests
Topic: Quickbeam 6809 Express?
Replies: 5
Views: 5933

Re: Quickbeam 6809 Express?

tormod wrote:However these sites require you [...], to register and what not.
Just in case people don't know, BugMeNot may be of use in these cases... :geek: