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s68k-side Silpheed hack (needed for EU version)

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@748 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-08-12 22:46:36 +00:00
parent ef090115c8
commit 07ceafdb04
4 changed files with 22 additions and 5 deletions
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9
pico/cd/memory.c
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@ -315,10 +315,13 @@ void s68k_reg_write8(u32 a, u32 d)
wram_1M_to_2M(Pico_mcd->word_ram2M);
PicoMemResetCD(d);
}
else
d |= dold&1;
// s68k can only set RET, writing 0 has no effect
if (d&1) d &= ~2; // return word RAM to m68k in 2M mode
else if ((dold ^ d) & d & 1) { // RET being set
SekEndRunS68k(20+16+10+12+16); // see DMNA case
} else
d |= dold & 1;
if (d & 1)
d &= ~2; // DMNA clears
}
break;
}