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Only zero page and stack should be affected by ALTZP

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This commit is contained in:
Peter Evans 2018-03-21 15:09:40 -05:00
parent 5ea10d8a98
commit 443f9d1a01
1 changed files with 6 additions and 2 deletions
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8
src/apple2.bank.c
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@ -58,7 +58,9 @@ SEGMENT_READER(apple2_bank_read)
// arbitrator; if it's on, we have to use aux, and if not, we have
// to use main. Whatever the segment was that was passed in will
// turn out to be immaterial.
segment = (mach->bank_switch & BANK_ALTZP) ? mach->aux : mach->main;
if ((mach->bank_switch & BANK_ALTZP) && addr < 0x200) {
segment = mach->aux;
}
if (~mach->bank_switch & BANK_RAM) {
// We need to account for the difference in address location
@ -97,7 +99,9 @@ SEGMENT_WRITER(apple2_bank_write)
}
// See my spiel in the read bank mapper; the same applies here.
segment = (mach->bank_switch & BANK_ALTZP) ? mach->aux : mach->main;
if ((mach->bank_switch & BANK_ALTZP) && addr < 0x200) {
segment = mach->aux;
}
// You will note, if we've gotten here, that it's possible to write
// to the bank-switch addresses even if the ROM flag is 1. It's