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Require STOP in order to stop.

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This commit is contained in:
Thomas Harte 2023-01-26 22:08:36 -05:00
parent 9a65fffe16
commit 1e5f751bc0
1 changed files with 14 additions and 9 deletions
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23
Components/9918/Implementation/9918.cpp
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@ -839,17 +839,23 @@ void Base<personality>::commit_register(int reg, uint8_t value) {
break;
case 46:
LOG("TODO: Yamaha command; " << PADHEX(2) << +value);
// b0–b3: LO0–LO3 (???)
// b4–b7: CM0-CM3 (???)
// b0–b3: LO0–LO3 (i.e. operation to apply if this is a logical command)
// b4–b7: CM0-CM3 (i.e. command to perform)
// If a command is already ongoing and this is not a stop, ignore it.
if(Storage<personality>::command_ && (value >> 4) != 0b0000) {
break;
}
#define Begin(x) Storage<personality>::command_ = std::make_unique<Commands::x>(Storage<personality>::command_context_);
switch(value >> 4) {
// All codes not listed below are invalid; just abandon
// whatever's going on, if anything.
default: Storage<personality>::command_ = nullptr;
//
// There's also no need to list STOP below as it was
// handled above.
default: break;
case 0b0000: break; // TODO: stop.
case 0b0100: break; // TODO: point.
case 0b0101: Begin(PointSet); break;
case 0b0110: break; // TODO: srch.
@ -875,8 +881,7 @@ void Base<personality>::commit_register(int reg, uint8_t value) {
// that minimum_access_column_ works properly. Why doesn't it
// ever end up out of bounds?
// TODO: undo temporary assumption of Graphics Mode 5.
// TODO: undo temporary assumption of Graphics Mode 5 and of logical operation.
uint8_t packed_colour = Storage<personality>::command_context_.colour & 3;
packed_colour |= packed_colour << 2;
packed_colour |= packed_colour << 4;
@ -896,9 +901,9 @@ void Base<personality>::commit_register(int reg, uint8_t value) {
}
Storage<personality>::command_ = nullptr;
} else {
LOG("TODO: Yamaha command " << PADHEX(2) << +value);
}
// TODO: record logical mode.
break;
}
}