I began to emulate different Dragon machines and software with Xroar. With pleasure.
When I saw that it was possible to emulate DragonPlus on MAME, I tried it with Windows 10 . After some difficulties, I saw the 80 columns screen appear. Super !
I'd like to go further with EDIT 128, flex and OS9 but I meet some problems with MAME.
First about the keyboard. There are two modes
- in "natural" mode my french keybords are well emulated, except the arrows. So I can't use EDIT128 without arrows
- in "emulated" mode, I have the arrows and can also in theory affect each key but it's impossible to have a complete french keyboard by that way.
So my question is : why arrows don't be emulated in natural mode for Dragon 32, DRAGON 64 and DRAGON 64 PLUS but are for CoCo ?
MAME Emulation
Re: MAME Emulation
Sounds like an oversight, I'll take a look next week when I'm back from vacation.
If you have any other problems/suggestions then let me know.
Re: MAME Emulation
Nigel, can you make the Dragons PAL machines by default?
Right now I think they are NTSC, when only the TANO Dragon was it.
I know that remaining TANO motherboards were used on regular Dragons sold to schools and learning centres, and were supplied with monitors instead of TVs.
Cheers,
Rob
Right now I think they are NTSC, when only the TANO Dragon was it.
I know that remaining TANO motherboards were used on regular Dragons sold to schools and learning centres, and were supplied with monitors instead of TVs.
Cheers,
Rob
Re: MAME Emulation
Well, you get the orange-blue ntsc artifacting, which does not occur on pal systems.
It would be nice to try the pal color artifacting too.
Games like Ola Eldoy’s Tetris use it.
It would be nice to try the pal color artifacting too.
Games like Ola Eldoy’s Tetris use it.
Re: MAME Emulation
Refresh rate last I checked is definitely off too (I can tell, because Dunjnuz measures it to determine whether to start up in artifacting PMODE 4 or colour PMODE 3).
Re: MAME Emulation
Ok, as I'm not a Dragon user wasn't aware of the orange-blue artifacting issue. Let me know of further test cases and expected behaviour and I'll get on to it.
Unlikely to make next week's release though. Also need to update the softlists with the latest archive additions.
Unlikely to make next week's release though. Also need to update the softlists with the latest archive additions.
Re: MAME Emulation
Just tried the Dunjunz dsk image and it crashes in dragon32 (works in dragon64), the loading screen says 'Loading (64K)' which is probably a clue. What does it check to determine 32K or 64K?
Re: MAME Emulation
The code I use is:
Code: Select all
reg_sam_tyc equ $ffde
reg_sam_tys equ $ffdf
; test for 64K
sta reg_sam_tys
lda $0062
ldb $8063
coma ; a != [$0062]
comb ; b != [$8063]
std $8062
cmpd $8062
bne no_64k ; didn't write
cmpd $0062
beq no_64k ; *did* shadow write
; ... 64K code ...
no_64k sta reg_sam_tyc
Edit: Also, wow! It doesn't just crash, it crashes. As in MAME segfaults (tested with 0.194 and 0.206 - I'll update my git repo and see what the latest does).
Further edit: same on 0.208
Re: MAME Emulation
Out of interest, I was trying the same thing with CoCo emulations in MAME (same deal with 32K - not working), but I couldn't see how to launch a PAL CoCo2. Any ideas? I can see the PAL CoCo3 in the list...