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Experiment with dialogue.

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This commit is contained in:
Thomas Harte 2025-03-07 14:24:08 -05:00
parent d7b46ee03c
commit 8caa1a9664
1 changed files with 51 additions and 16 deletions
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67
Machines/PCCompatible/KeyboardController.hpp
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@ -121,13 +121,14 @@ public:
}
template <typename IntT>
void write(const uint16_t port,const IntT value) {
void write(const uint16_t port, const IntT value) {
switch(port) {
default:
log_.error().append("Unimplemented AT keyboard write: %04x to %04x", value, port);
break;
case 0x0060:
log_.error().append("Keyboard parameter set to: ", value);
parameter_ = value;
break;
@ -140,17 +141,9 @@ public:
break;
case 0x0064:
switch(value) {
default:
log_.error().append("Unimplemented AT keyboard command %04x", value);
break;
case 0xaa: // Self-test; 0x55 => no issues found.
is_tested_ = true;
parameter_ = 0x55;
has_input_ = true;
break;
}
has_output_ = true;
is_command_ = true;
parameter_ = value;
break;
}
}
@ -163,6 +156,8 @@ public:
break;
case 0x0060:
log_.error().append("Read keyboard parameter of %02x", parameter_);
has_input_ = false;
return parameter_;
case 0x0061:
@ -174,7 +169,7 @@ public:
log_.info().append("AT keyboard: %02x from %04x", refresh_toggle_, port);
return refresh_toggle_;
case 0x0064:
case 0x0064: {
// Status:
// b7 = 1 => parity error on transmission;
// b6 = 1 => receive timeout;
@ -184,9 +179,15 @@ public:
// b2 = 1 = selftest OK; 0 = just powered up or reset;
// b1 = 1 => input buffer has data;
// b0 = 1 => output data is full.
return
(is_tested_ ? 0x4 : 0x0) |
(has_input_ ? 0x2 : 0x0);
const uint8_t status =
(is_command_ ? 0x08 : 0x00) |
(is_tested_ ? 0x04 : 0x00) |
(has_input_ ? 0x02 : 0x00) |
(has_output_ ? 0x01 : 0x00);
log_.error().append("Reading status: %02x", status);
perform_command();
return status;
}
}
return IntT(~0);
}
@ -194,13 +195,47 @@ public:
private:
Log::Logger<Log::Source::PCCompatible> log_;
void perform_command() {
if(!is_command_) {
return;
}
has_output_ = false;
is_command_ = false;
const auto set_input = [&](const uint8_t input) {
parameter_ = input;
has_input_ = true;
is_command_ = false;
};
auto info = log_.info();
info.append("AT keyboard command %04x", command_);
switch(command_) {
default:
info.append("; unimplemented");
break;
case 0xaa: // Self-test; 0x55 => no issues found.
log_.error().append("Keyboard self-test");
is_tested_ = true;
set_input(0x55);
break;
case 0xd1: // Set output byte. b0 = the A20 gate.
break;
}
}
PICs<model> &pics_;
Speaker &speaker_;
uint8_t refresh_toggle_ = 0;
bool is_tested_ = false;
bool has_input_ = false;
bool has_output_ = false;
bool is_command_ = false;
uint8_t parameter_;
uint8_t command_;
};
}