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This commit is contained in:
Thomas Harte 2024-03-25 21:31:59 -04:00
parent d2776071e4
commit a2d95cb982
1 changed files with 30 additions and 26 deletions
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56
Machines/Acorn/Archimedes/InputOutputController.hpp
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@ -167,7 +167,7 @@ struct InputOutputController {
value = control_ | 0xc0;
value &= ~(i2c_.clock() ? 2 : 0);
value &= ~(i2c_.data() ? 1 : 0);
logger.error().append("IOC control read: C:%d D:%d", !(value & 2), !(value & 1));
// logger.error().append("IOC control read: C:%d D:%d", !(value & 2), !(value & 1));
break;
case 0x04:
@ -352,12 +352,33 @@ struct InputOutputController {
break;
case 0x18:
// TODO, per the A500 documentation:
//
// Latch B:
// b0: ?
// b1: double/single density; 0 = double.
// b2: ?
// b3: floppy drive reset; 0 = reset.
// b4: printer strobe
// b5: ?
// b6: ?
// b7: HS3?
logger.error().append("TODO: latch B write; %02x", byte(bus_value));
break;
case 0x40: {
// TODO, per the A500 documentation:
//
// Latch A:
// b0, b1, b2, b3 = drive selects;
// b4 = side select;
// b5 = motor on/off
// b6 = floppy in use (i.e. LED?);
// b7 = "Not used."
const uint8_t value = byte(bus_value);
logger.error().append("TODO: latch A write; %02x", value);
// logger.error().append("TODO: latch A write; %02x", value);
// Set the floppy indicator on if any drive is selected,
// because this emulator is compressing them all into a
@ -370,34 +391,17 @@ struct InputOutputController {
} break;
case 0x48:
// TODO, per the A500 documentation:
//
// Latch C:
// (probably not present on earlier machines?)
// b2/b3: sync polarity [b3 = V polarity, b2 = H?]
// b0/b1: VIDC master clock; 00 = 24Mhz, 01 = 25.175Mhz; 10 = 36Mhz; 11 = reserved.
logger.error().append("TODO: latch C write; %02x", byte(bus_value));
break;
}
break;
// TODO, per the A500 documentation:
//
// Latch A:
// b0, b1, b2, b3 = drive selects;
// b4 = side select;
// b5 = motor on/off
// b6 = floppy in use (i.e. LED?);
// b7 = "Not used."
//
// Latch B:
// b0: ?
// b1: double/single density; 0 = double.
// b2: ?
// b3: floppy drive reset; 0 = reset.
// b4: printer strobe
// b5: ?
// b6: ?
// b7: HS3?
//
// Latch C:
// (probably not present on earlier machines?)
// b2/b3: sync polarity [b3 = V polarity, b2 = H?]
// b0/b1: VIDC master clock; 00 = 24Mhz, 01 = 25.175Mhz; 10 = 36Mhz; 11 = reserved.
}
break;
}