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Adds some notes to self.

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I think I'm starting to find enough information to handle tapes.
This commit is contained in:
Thomas Harte 2021-06-28 22:03:06 -04:00
parent 1119779c8b
commit 2c139ad931
1 changed files with 24 additions and 4 deletions
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28
Machines/Enterprise/Enterprise.cpp
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@ -359,10 +359,19 @@ template <bool has_disk_controller> class ConcreteMachine:
*cycle.value = 0xff;
}
break;
case 0xb6:
// TODO: joystick input.
case 0xb6: {
// TODO: selected keyboard row, 0 to 9, should return one bit of joystick
// input. That being the case:
//
// b0: joystick input
// b1, b2: unused (in theory read from control port, but not used by any hardware)
// b3: 0 = printer ready; 1 = not ready
// b4: serial, data in
// b5: serial, status in
// b6: tape input volume level, 0 = high, 1 = low
// b7: tape data input
*cycle.value = 0xff;
break;
} break;
}
break;
@ -414,11 +423,22 @@ template <bool has_disk_controller> class ConcreteMachine:
break;
case 0xb5:
active_key_line_ = *cycle.value & 0xf;
// TODO: printer strobe, type sound, REM switches.
// TODO:
//
// b4: strobe output for printer
// b5: tape sound control (?)
// b6: tape motor control 1, 1 = on
// b7: tape motor control 2, 1 = on
break;
case 0xb6:
// Just 8 bits of printer data.
printf("TODO: printer output %02x\n", *cycle.value);
break;
case 0xb7:
// b0 = serial data out
// b1 = serial status out
printf("TODO: serial output %02x\n", *cycle.value);
break;
case 0xbf:
// TODO: onboard RAM, Dave 8/12Mhz select.
switch((*cycle.value >> 2)&3) {