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Remove two-op checks

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This commit is contained in:
Peter Evans 2018-04-20 16:47:51 -05:00
parent 9ac85cb30b
commit be82a23061
1 changed files with 10 additions and 20 deletions
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30
src/apple2/bank.c
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@ -17,6 +17,8 @@
#include "apple2/bank.h"
#include "apple2/mem.h"
#include "objstore.h"
#include "vm_di.h"
#include "vm_event.h"
/*
* These are the addresses that need to be mapped to the
@ -169,22 +171,16 @@ SEGMENT_READER(apple2_bank_switch_read)
return 0x80;
case 0xC081:
if (last_addr == addr) {
apple2_set_bank_switch(mach, BANK_WRITE | BANK_RAM2);
return 0x80;
}
return 0x00;
apple2_set_bank_switch(mach, BANK_WRITE | BANK_RAM2);
return 0x80;
case 0xC082:
apple2_set_bank_switch(mach, BANK_RAM2);
return 0x80;
case 0xC083:
if (last_addr == addr) {
apple2_set_bank_switch(mach, BANK_RAM | BANK_WRITE | BANK_RAM2);
return 0x80;
}
return 0x00;
apple2_set_bank_switch(mach, BANK_RAM | BANK_WRITE | BANK_RAM2);
return 0x80;
// Conversely, the $C088 - $C08B range control memory access
// while using bank 1 RAM.
@ -193,22 +189,16 @@ SEGMENT_READER(apple2_bank_switch_read)
return 0x80;
case 0xC089:
if (last_addr == addr) {
apple2_set_bank_switch(mach, BANK_WRITE);
return 0x80;
}
return 0x00;
apple2_set_bank_switch(mach, BANK_WRITE);
return 0x80;
case 0xC08A:
apple2_set_bank_switch(mach, BANK_DEFAULT);
return 0x80;
case 0xC08B:
if (last_addr == addr) {
apple2_set_bank_switch(mach, BANK_RAM | BANK_WRITE);
return 0x80;
}
return 0x00;
apple2_set_bank_switch(mach, BANK_RAM | BANK_WRITE);
return 0x80;
// Return high on the 7th bit if we're using bank 2 memory
case 0xC011: