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Update 15.cpp 

changes in accordance to the reverse-engineered mapper schematics:
- changed bank mode 1 mapping CPU $C000-$DFFF from "fixed to last bank" to "B OR 7" to support multiple 128KiB UNROM games in one cart
- latch D.7 bit ignored outside bank mode 2
- fixed latch D.6 bit interpreted as bank number bit
This commit is contained in:
norill 2019-10-02 18:30:36 +02:00 committed by GitHub
parent 8b1c405d95
commit 5ca7f608f7
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1 changed files with 5 additions and 5 deletions
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10
src/boards/15.cpp
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@ -38,20 +38,20 @@ static void Sync(void) {
switch (latchea & 3) {
case 0:
for (i = 0; i < 4; i++)
setprg8(0x8000 + (i << 13), (((latched & 0x7F) << 1) + i) ^ (latched >> 7));
setprg8(0x8000 + (i << 13), ((latched & 0x3F) << 1) + i);
break;
case 2:
for (i = 0; i < 4; i++)
setprg8(0x8000 + (i << 13), ((latched & 0x7F) << 1) + (latched >> 7));
setprg8(0x8000 + (i << 13), ((latched & 0x3F) << 1) + (latched >> 7));
break;
case 1:
case 3:
for (i = 0; i < 4; i++) {
unsigned int b;
b = latched & 0x7F;
b = latched & 0x3F;
if (i >= 2 && !(latchea & 0x2))
b = 0x7F;
setprg8(0x8000 + (i << 13), (i & 1) + ((b << 1) ^ (latched >> 7)));
b = b | 0x07;
setprg8(0x8000 + (i << 13), (i & 1) + (b << 1));
}
break;
}