Eshs
From DaphneWiki
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(→Z80 Port Map) |
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|Out | |Out | ||
|Misc value? | |Misc value? | ||
| + | |- | ||
| + | |0xF8 | ||
| + | |Out | ||
| + | |0 disables start button lamp. 1 enables. | ||
| + | |- | ||
| + | |0xFA | ||
| + | |Out | ||
| + | |0 disables action button lamp. 1 enables. | ||
| + | |- | ||
| + | |0xF8 | ||
| + | |Out | ||
| + | |0 disables joystick lamp. 1 enables. | ||
|- | |- | ||
|0xFE | |0xFE | ||
|Out | |Out | ||
| - | |0 | + | |0 forces IRQ' line to be high (disabled). 1 allows IRQs to be triggered normally. |
|- | |- | ||
|0xFF | |0xFF | ||
|Out | |Out | ||
| - | |0 | + | |0 forces NMI' line to be high (disabled). 1 allows NMIs to be triggered normally. |
|- | |- | ||
Revision as of 21:17, 16 August 2020
Contents |
Esh's Aurunmilla
Memory Map
| Address Range | Description |
| 0x0000-0x1FFF | ROM H8 |
| 0x2000-0x3FFF | ROM F8 |
| 0x4000-053FFF | ROM E8 |
| 0x6000-073FFF | ROM D8 |
| 0x8000-0x9FFF | ROM C8 |
| 0xE000-0xE7FF | CPU RAM |
| 0xF000-0xF7FF | Unknown (Daphne says that this is video hardware) |
Z80 Port Map
| Address Range | Direction | Description |
| 0xF0 | In | Control panel input. Only lower 6 data bits are used. |
| 0xF1 | In | Control panel input. Only lower 6 data bits are used. |
| 0xF2 | In | Control panel input. Only lower 6 data bits are used. |
| 0xF3 | In | Control panel input. Only lower 6 data bits are used. |
| 0xF4 | In/Out | LD-V1000 data. Writing queues a command to be sent on the next command strobe. Reading reads the most recent byte received during last the status strobe. |
| 0xF5 | Out | Misc value? |
| 0xF8 | Out | 0 disables start button lamp. 1 enables. |
| 0xFA | Out | 0 disables action button lamp. 1 enables. |
| 0xF8 | Out | 0 disables joystick lamp. 1 enables. |
| 0xFE | Out | 0 forces IRQ' line to be high (disabled). 1 allows IRQs to be triggered normally. |
| 0xFF | Out | 0 forces NMI' line to be high (disabled). 1 allows NMIs to be triggered normally. |
Interrupts
NMI: Caused by LD-V1000 status strobe going low (becoming active)
IRQ: Caused by D2 output (pin 10) on vertical PROM (C6) transitioning from 0 to 1.
