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Luxor ABC802 System Memory Map
Normal memory space is available, when computer is
running in ordinary mode. There is also an additional data
memory available that overlaps the system ROMs.
Memory management is performed via functions available in the Options ROM and the Cassette/MEM: ROM. The
data memory is available for Basic thru the special MEM: device.
Generic memory layout
| Normal | | Graphics |
|---|
| Start address | Block size | Description | Description | Block size | Start address |
|---|
| 0000h | 24k | Basic ROM | Data memory (RAM) | 32k | 0000h |
| 6000h | 4k | DOS ROM |
| 7000h | 2k | Options ROM |
| 7800h | 2k | Display memory | Cassette/MEM: ROM
Overlaps RAM when necessary | 2k | 7800h |
| 8000h | 32k | Work memory area (RAM) | | | |
| Start address | Block size | Description |
|---|
| 8000h | 29k | Available for BASIC |
| FD00h | 1k | CASBUF1 |
| FE00h | 1k | CASBUF2 and MEM:BUF |
| FF00h | 1k | Basic variables |
Work area in detail when disk drive is connected
| Start address | Block size | Description |
|---|
| 8000h | 21k | Available for BASIC |
| F500h | 1k | DOSBUF0 |
| F600h | 1k | DOSBUF1 |
| F700h | 1k | DOSBUF2 |
| F800h | 1k | DOSBUF3 |
| F900h | 1k | DOSBUF4 |
| FA00h | 1k | DOSBUF5 |
| FB00h | 1k | DOSBUF6 and CASBUF1 |
| FC00h | 1k | DOSBUF7, CASBUF2 and MEM:BUF |
| FD00h | 1k | System variables |
| FE00h | 1k | Unused memory region |
| FF00h | 1k | Basic variables |