Baffa-2 64KB RAM
64KB RAM for Baffa-2. The schematic is based on desing from "RC2014 64KB RAM Module" by Spencer Owen.
64KB RAM
64KB RAMRelated Files:
Settings
Default: starts on 4000h + page (sets start to 0h)CP/M Setup:
- S1 ooo
- S2 ooo
- S3 o= 2-3 (gnd - ignore S1 and S2)
- S4 o= 2-3 (S3 | A15 | !PAGE)
- PAGE 2 -- CS_RAM
| S1 | ||
|---|---|---|
| =o | A12 + A13 (starts on 1000h | 4KB-64KB) | |
| o= | A13 only (starts on 2000h | 8KB-64KB) | |
| S2 | ||
| =o | S1 + A14 (starts on S1) | |
| o= | A14 only (starts on 4000h | 16KB-64KB) | |
| S3 | ||
| =o | mem conf (S1 / S2) | |
| o= | mem conf off (mem starts on 0000h) | |
| S4 | ||
| =o | mem conf only | |
| o= | mem conf + page | |
| PAGE | ||
|---|---|---|
| pin1 | vcc | |
| pin2 | PAGE | |
| pin3 | gnd | |
| =o | page always on | |
| o= | page always off | |