Baffa-2 Pageable ROM
Pageable ROM for Baffa-2. This allows the computer to load the CP/M Bios and boot. The original CP/M Bios was written by Grant Searle.
The schematic is based on desing from "RC2014 Pageable ROM Module" by Spencer Owen.
Boards compatible with Default Roms:
Boards compatible with Default Roms:
- Baffa-2 Bios Rom
- Grant Searle Bios/Monitor
- Small Computer Monitor
Pageable ROM
Pageable ROMRelated Files:
Firmware:
- Baffa-2 ROM (Binary)
Settings
Ports: 30h (Reset page) / 38h (Enable Page)| PAGE ADDR | Disable (0 x) | Enable (x 1) |
|---|---|---|
| pin1 0400h | =o | o= |
| pin2 0800h | =o | o= |
| pin3 1000h | =o | o= |
| pin4 2000h | =o | o= |
| pin5 4000h | =o | o= |
| pin6 8000h | =o | o= |
| ROM SIZE | =o (1-2) | 2-3 |
| JP_10 | 0400h (1K) | - |
| JP_11 | 0800h (2K) | - |
| JP_12 | 1000h (4K) | - |
| JP_13 | 2000h (8K) | - |
| JP_14 | 4000h (16K) | - |
| Ports | ||
|---|---|---|
| pin1 | 28h | |
| pin2 | 20h | |
| pin3 | 18h | |
| pin4 | 10h | |
| pin5 | 08h | |
| pin6 | 00h | |
| Page | ||
| pin1 | GND | |
| pin2 | VCC | |
| pin3 | PAGE | |
| pin4 | /PAGE | |
Default Settings:
- PAGE_ADDR
1 ooo
2 ooo
3 ooo
4 =0 (disable)
5 0= (enable)
6 0= (enable)
- JP_10 =0 (1-2)
- JP_11 =0 (1-2
- JP_12 =0 (1-2)
- JP_13 0= (2-3)
- JP_14 0= (2-3)
Related Datasheets:
Related Projects:
Related Revisions:
- Nov/2021 Prototype