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Use detection for play button; allow computer to set motor.

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This commit is contained in:
Thomas Harte 2025-01-04 22:54:13 -05:00
parent 74db978b81
commit f0711a9fbc
1 changed files with 7 additions and 8 deletions
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15
Machines/Commodore/Plus4/Plus4.cpp
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@ -249,13 +249,11 @@ public:
}
const auto output = io_output_ | ~io_direction_;
// tape_player_->set_motor_control(~output & 0x08);
tape_player_->set_motor_control(~output & 0x08);
serial_port_.set_output(Serial::Line::Data, Serial::LineLevel(~output & 0x01));
serial_port_.set_output(Serial::Line::Clock, Serial::LineLevel(~output & 0x02));
serial_port_.set_output(Serial::Line::Attention, Serial::LineLevel(~output & 0x04));
}
// printf("%04x: %02x %c\n", address, *value, isReadOperation(operation) ? 'r' : 'w');
} else if(address < 0xfd00 || address >= 0xff40) {
if(isReadOperation(operation)) {
*value = map_.read(address);
@ -269,9 +267,9 @@ public:
if((address & 0xfff0) == 0xfd10) {
// 6529 parallel port, about which I know only what I've found in kernel ROM disassemblies.
// If tape motor is not currently running and this read is immediately followed by
// an AND 4, turn the tape motor on.
if(!tape_player_->motor_control()) {
// If play button is not currently pressed and this read is immediately followed by
// an AND 4, press it. The kernel will deal with motor control subsequently.
if(!play_button_) {
const uint16_t pc = m6502_.value_of(CPU::MOS6502::Register::ProgramCounter);
const uint8_t next[] = {
map_.read(pc+0),
@ -283,11 +281,11 @@ public:
// TODO: boil this down to a PC check. It's currently in this form as I'm unclear what
// diversity of kernels exist.
if(next[0] == 0x29 && next[1] == 0x04 && next[2] == 0xd0 && next[3] == 0xf4) {
tape_player_->set_motor_control(true); // TODO: match to tape motor IO state.
play_button_ = true;
}
}
*value = 0xff ^ (tape_player_->motor_control() ? 0x4 :0x0);
*value = 0xff ^ (play_button_ ? 0x4 :0x0);
} else {
*value = 0xff;
}
@ -568,6 +566,7 @@ private:
SerialPort serial_port_;
std::unique_ptr<Storage::Tape::BinaryTapePlayer> tape_player_;
bool play_button_ = false;
uint8_t io_direction_ = 0x00, io_output_ = 0x00;
};
}