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IMHO, good to keep this thread alive. But you should send him a mail, too. See first post.

I have tried ALLDREAM and ", without success. I get always "FULL"

I looked into Dragondata_alldream_manual.pdf and it seems that's very complicated to use, isn't it?

I also tried DskDream for Dragon DOS, but can't LOAD or RUN in XRoar. The emulator hangs.

Yes, there is a routine to print the value of D. JSR 38266 outputs the decimal value of D register I get it: 10 ' MACHINE CODE LOADER 20 READ LA ' LA = LOAD ADDRESS (START OF PROGRAM) 30 READ EA ' EA = ADDRESS OF FIRST INSTRUCTION 40 PA = EA 'TO BE EXECUTED 50 READ HB$ ' HEX CONSTANTS 60 IF HB$="EN...

Sarah wrote:Use a debugger

Which one?

Great job! Is there any plans to add a visual debugger on it ? The debugger on MESS is what makes me stick with it. It is really useful to develop or port games using it. Well now, I don't really have plans to build a debugger into the main binary beyond "trace mode", but look: http://www.6809.org....

Rink wrote:Did you get this working then?

No. I tried a little bit, but no success, yet.

Rink wrote:Maybe we need a Wiki page on this topic?

Wiki pages with information is a general good idea

OK, here a programm thats print "X" via machine code: 10 ' MACHINE CODE LOADER 20 READ LA ' LA = LOAD ADDRESS (START OF PROGRAM) 30 READ EA ' EA = ADDRESS OF FIRST INSTRUCTION 40 PA = EA 'TO BE EXECUTED 50 READ HB$ ' HEX CONSTANTS 60 IF HB$="END" THEN 100 70 POKE PA,VAL("&H"+HB$) ' POKE VALUE INTO M...

next small steps done: BEW, BIT, BNE and "relative" addressing mode, done.

Debug output looks like: https://gist.github.com/jedie/6779646

commints: https://github.com/jedie/DragonPy/commits

I see that there is the commented assembler code in InsideTheDragon. I put all together: 170 DATA 34,12 ' SCRFL PSHS A,X ; Save registers A, X 180 DATA 86,00 ' LDA $0 ; First character 190 DATA 8E,04,00 ' NXTSC LDX $400 ; X = text screen start 200 DATA A7,80 ' PRCH STA ,X+ ; Store character 210 DATA...

OK, now it worked! :D code: 10 ' MACHINE CODE LOADER 20 READ LA ' LA = LOAD ADDRESS (START OF PROGRAM) 30 READ EA ' EA = ADDRESS OF FIRST INSTRUCTION 40 PA = EA 'TO BE EXECUTED 50 READ HB$ ' HEX CONSTANTS 60 IF HB$="END" THEN 100 70 POKE PA,VAL("&H"+HB$) ' POKE VALUE INTO MEMORY 80 PA = PA + 1 ' INC...