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Flip all eight bits for physically complemented Zorro registers

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This appears to be consistent with the way data is presented when reading nibbles from autoconf registers on a real Amiga.
This commit is contained in:
beeanyew 2020-12-09 15:07:24 +01:00
parent b82265a918
commit ffe8d91bbd
1 changed files with 4 additions and 3 deletions
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7
platforms/amiga/amiga-autoconf.c
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@ -132,7 +132,7 @@ unsigned int autoconfig_read_memory_z3_8(struct emulator_config *cfg, unsigned i
}
}
//printf("Read byte %d from Z3 autoconf for PIC %d (%.2X).\n", address, ac_z3_current_pic, val);
return (address & 0x100) ? (val << 4) ^ 0xF0 : (val & 0xF0) ^ 0xF0;
return (address & 0x100) ? (val << 4) ^ 0xFF : (val & 0xF0) ^ 0xFF;
}
int nib_latch = 0;
@ -169,6 +169,7 @@ void autoconfig_write_memory_z3_8(struct emulator_config *cfg, unsigned int addr
nib_latch = 1;
break;
case AC_Z3_REG_SHUTUP:
//printf("Write to Z3 shutup register for PIC %d.\n", ac_z3_current_pic);
done = 1;
break;
default:
@ -192,7 +193,6 @@ void autoconfig_write_memory_z3_16(struct emulator_config *cfg, unsigned int add
int index = ac_z3_index[ac_z3_current_pic];
unsigned short val = (unsigned short)value;
int done = 0;
//if (index || done || address || cfg || val || value) {}
switch(address & 0xFF) {
case AC_Z3_REG_WR_ADDR_HI:
@ -247,7 +247,7 @@ unsigned int autoconfig_read_memory_8(struct emulator_config *cfg, unsigned int
}
val <<= 4;
if (address != 0 && address != 2 && address != 40 && address != 42)
val ^= 0xf0;
val ^= 0xff;
return (unsigned int)val;
}
@ -285,6 +285,7 @@ void autoconfig_write_memory_8(struct emulator_config *cfg, unsigned int address
}
done = 1;
} else if (address == 0x4c) { // shut up
//printf("Write to Z2 shutup register for PIC %d.\n", ac_z2_current_pic);
done = 1;
}
}