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Implements multidrive support.

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This commit is contained in:
Thomas Harte 2020-02-12 23:32:01 -05:00
parent 9f32fa7f5b
commit e01c66fd65
1 changed files with 12 additions and 0 deletions
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12
Machines/Oric/BD500.cpp
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@ -24,6 +24,18 @@ void BD500::write(int address, uint8_t value) {
// if(address == 0x320) printf("Command %02x\n", value);
WD::WD1770::write(address, value);
}
if(address == 0x031a) {
// Drive select; kudos to iss of Oricutron for figuring this one out;
// cf. http://forum.defence-force.org/viewtopic.php?f=25&p=21409#p21393
switch(value & 0xe0) {
default: set_drive(0); break;
case 0x20: set_drive(1); break;
case 0x40: set_drive(2); break;
case 0x80: set_drive(4); break;
case 0xc0: set_drive(8); break;
}
}
}
uint8_t BD500::read(int address) {