search

AgonConsole8 / agon-mos

Official AGON QUARK Firmware for Console8: eZ80 MOS
MIT License
25 stars 10 forks source link

fread and fwrite works only with ADL pointers #66

Open nihirash opened 4 months ago

nihirash commented 4 months ago

I can open file by 16 bit pointer in legacy cpu mode but when I'll try read or write to buffer from non-ADL mode I'm getting failure - cause API works only with full ADL pointers.

As current workaround I'm using prefixed LD command(LD.LIL) but best solution will be making API consistent and allow use fread and fwrite with non-ADL pointers(when MB isn't equal zero).

calc84maniac commented 4 months ago

I'd also like to add to this that ffs_api_fread and ffs_api_fwrite unnecessarily destroy a shadow register which isn't really noted in the API (and no other APIs, or anything in MOS in general, seem to do this).

This code sequence:

            EXX     
            LD  HL, _scratchpad
            PUSH    HL
            EXX

Could be replaced with this sequence, which is also smaller:

            PUSH    HL
            LD  HL, _scratchpad
            EX  (SP), HL