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
| VARESET'
|
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
| ?
|
9
| ?
|
11
| ?
|
13
| 5V (this is the output to indicate LDP is not present)
|
14
| 5V (WRESET')
|