Multiface 2 programming

[Ast]

Hello everybody...

Is it possible to execute a rom code using the ram plage (#2000-#37ff) in the multiface 2 interface?
(Direct jump, of course!)


The code will use the rst#18 to run a rom proggy.




Thanks for reply.

[arnoldemu]

Hello everybody...

Is it possible to execute a rom code using the ram plage (#2000-#37ff) in the multiface 2 interface?
(Direct jump, of course!)


The code will use the rst#18 to run a rom proggy.




Thanks for reply.

Execute in another ROM?

Yes if you jump direct (out df00 and jump to rom), no if you use rst#18.

You will need to go to ram first and disable the mf2 ram/rom before the rst#18.

[Ast]

Is this like that ?

Code Select Expand


Di
Ld bc,#fee8 ; enable multiface 2
Out (c ),c
....
Ld bc,#feea ; disable multiface 2
Out (c),c
Ei
Ret


[arnoldemu]

Is this like that ?

Code Select Expand


Di
Ld bc,#fee8 ; enable multiface 2
Out (c ),c
....
Ld bc,#feea ; disable multiface 2
Out (c),c
Ei
Ret


Yes, but it depends on what you need to do.

Are you calling mf2 rom, or another rom?

if your code is in mf2 ram, and you want to call another rom then do this:

Code Select Expand


org &2000
ld hl,call_rom
ld de,&be00
ld bc,end_call_rom-call_rom
ldir
call &be00
ret

call_rom:
di
ld bc,&feea
out (c),c
ei
rst 18
defw rst_addr
di
ld bc,&fee8
out (c),c
ei
ret


[Ast]

if your code is in mf2 ram, and you want to call another rom then do this:

Code Select Expand


org &2000
ld hl,call_rom
ld de,&be00
ld bc,end_call_rom-call_rom
ldir
call &be00
ret

call_rom:
di
ld bc,&feea
out (c),c
ei
rst 18
defw rst_addr
di
ld bc,&fee8
out (c),c
ei
ret


Thanks Kevin. That's exactly how i do. I'll post soon my final code.