HalcyonNotes
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Contents |
Halcyon
Hardware
Notable components
Z80A CPU (main game logic) MC6809P MCU (speech recognition logic) COP421 MCU (keyboard logic) SSI263 (speech generation)
Memory Map
| Address Range | Description |
| 0x0000-0x7FFF | ROM U33 (27256) |
| 0x8000-0x9FFF | ROM U32 (2764) |
| 0xA000-0xBFFF | RAM U31 (2187A) |
| 0xC000-0xDFFF | Cartridge ROM #1 (2764) |
| 0xE000-0xFFFF | Cartridge ROM #2 (2764) |
Z80 Port Map
| Address Range | Direction | Description |
| 0x | In/Out | Speech synth registers |
| 2x | Out | Data output latch 1 |
| 4x | Out | Data output latch 2 |
| 6x | In/Out | Speech recognition data |
| 8x | In/Out | I/O timer data |
| Ax | Out? | Clear timer interrupt |
| Cx | Out? | Clear IOT data ready interrupt |
| Ex | Out? | Clear speech recognition interrupt |
Z80 Interrupts
NMI: TODO
IRQ: TODO
