From DaphneWiki
Halcyon
Hardware
Notable components
- Z80A CPU (main game logic)
- MC6803P 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
Troubleshooting log
U44
Pin 3 and 11 both output 4 MHz (confirmed).
U7
| Pin
| Note
|
| 1
| 5V, VARESET'. Always not being pulled to GND as long as 12V and 5V_U10 are both present (which I can't see how they ever wouldn't be since 5V_U10 depends on 12V)
|
| 2
| Not Connected
|
| 3
| 5V
|
| 4
| GND
|
| 6,8,10
| 2.5V
|
| 7
| 4.1V
|
| 12
| GND
|
When LDP is not present:
| Pin
| Note
|
| 5
| 0V
|
| 9
| 0.4V
|
| 11
| 0V (this is the LDP 11V input)
|
| 13
| 0V (this is the output to indicate LDP is not present)
|
| 14
| 0V (WRESET')
|
When LDP is present:
| Pin
| Note
|
| 5
| 0V
|
| 9
| 5V
|
| 11
| 8.47V (10V going through CR3 diode)
|
| 13
| 5V (this is the output to indicate LDP is not present)
|
| 14
| 5V (WRESET')
|
