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Transcribe all missing registers.

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This commit is contained in:
Thomas Harte 2023-01-16 20:26:27 -05:00
parent bfe94eb268
commit 32b29bd63b
1 changed files with 85 additions and 28 deletions
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113
Components/RP5C01/RP5C01.cpp
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@ -91,43 +91,100 @@ void RP5C01::run_for(HalfCycles cycles) {
}
}
namespace {
constexpr int Reg(int mode, int address) {
return address | mode << 4;
}
}
/// Performs a write of @c value to @c address.
void RP5C01::write(int address, uint8_t value) {
address &= 0xf;
value &= 0xf;
// Registers D–F don't depend on the mode.
if(address >= 0xd) {
switch(address) {
default: break;
case 0xd:
timer_enabled_ = value & 0x8;
alarm_enabled_ = value & 0x4;
mode_ = value & 0x3;
break;
case 0xe:
// Test register; unclear what is supposed to happen.
break;
case 0xf:
one_hz_on_ = !(value & 0x8);
sixteen_hz_on_ = !(value & 0x4);
// TODO: timer reset on bit 1, alarm reset on bit 0
break;
}
// Handle potential RAM accesses.
if(address < 0xd && mode_ >= 2) {
address += mode_ == 3 ? 13 : 0;
ram_[size_t(address)] = value & 0xf;
return;
}
switch(mode_) {
case 3:
address += 13;
[[fallthrough]];
case 2:
ram_[size_t(address)] = value & 0xf;
return;
switch(Reg(mode_, address)) {
default: break;
// Seconds.
case Reg(0, 0x00):
seconds_ = seconds_ - (seconds_ % 10) + (value % 10);
break;
case Reg(0, 0x01):
seconds_ = (seconds_ % 10) + ((value % 6) * 10);
break;
// TODO: minutes.
case Reg(0, 0x02):
case Reg(0, 0x03): break;
// TODO: hours.
case Reg(0, 0x04):
case Reg(0, 0x05): break;
// TODO: day-of-the-week counter.
case Reg(0, 0x06): break;
// TODO: day counter.
case Reg(0, 0x07):
case Reg(0, 0x08): break;
// TODO: month counter.
case Reg(0, 0x09):
case Reg(0, 0x0a): break;
// TODO: year counter.
case Reg(0, 0x0b):
case Reg(0, 0x0c): break;
// TODO: alarm minutes.
case Reg(1, 0x02):
case Reg(1, 0x03): break;
// TODO: alarm hours.
case Reg(1, 0x04):
case Reg(1, 0x05): break;
// TODO: alarm day-of-the-week.
case Reg(1, 0x06): break;
// TODO: alarm day.
case Reg(1, 0x07):
case Reg(1, 0x08): break;
// TODO: 12/24 hour select.
case Reg(1, 0x0a): break;
// TODO: leap-year counter.
case Reg(1, 0x0b): break;
//
// Registers D–F don't depend on the mode.
//
case Reg(0, 0xd): case Reg(1, 0xd): case Reg(2, 0xd): case Reg(3, 0xd):
timer_enabled_ = value & 0x8;
alarm_enabled_ = value & 0x4;
mode_ = value & 0x3;
break;
case Reg(0, 0xe): case Reg(1, 0xe): case Reg(2, 0xe): case Reg(3, 0xe):
// Test register; unclear what is supposed to happen.
break;
case Reg(0, 0xf): case Reg(1, 0xf): case Reg(2, 0xf): case Reg(3, 0xf):
one_hz_on_ = !(value & 0x8);
sixteen_hz_on_ = !(value & 0x4);
// TODO: b0 = alarm reset; b1 = timer reset.
break;
}
// TODO.
printf("RP-5C01 write of %d to %d in mode %d\n", value, address & 0xf, mode_);
}
uint8_t RP5C01::read(int address) {