The FileStore E01E Backplane is similar to the Acorn System Backplane using 64-way DIN41612 a/b connectors, four in total.
This backplane works fine if only 1" wide front panels are used however if a 2" panel is used for the FDC board i.e. with a GOTEK display then the fourth slot cannot be used, an oversight on my part ! I will have a 5-slot Backplane available in the near future.
Signal allocations on Side A are the same as the System backplane whilst Side B carries mainly FileStore E01E specific signals:
| Pin Number | Side A Signal | Side B Signal |
| 1 | +5V | |
| 2 | A15 | |
| 3 | A14 | |
| 4 | WE | |
| 5 | RD | |
| 6 | RESET | |
| 7 | A8 | |
| 8 | A7 | |
| 9 | A6 | |
| 10 | A5 | |
| 11 | A4 | |
| 12 | A3 | |
| 13 | A2 | |
| 14 | A1 | |
| 15 | A0 | |
| 16 | D7 | |
| 17 | D6 | Drive 4 (Left) Select |
| 18 | D5 | Drive 5 (Right) Select |
| 19 | D4 | FSMode Switch |
| 20 | D3 | FSMode LED |
| 21 | D2 | Econet Clock Status LED |
| 22 | D1 | Econet Clock Status |
| 23 | D0 | Econet Interrupt Enable |
| 24 | A13 | FDC Latch Write ($FC08) |
| 25 | A12 | FDC Latch Enable ($FC0C-$FC23) |
| 26 | A11 | Econet Enable ($FC20-$FC23) |
| 27 | A10 | SCSI Enable ($FC3x) |
| 28 | A9 | IRQ |
| 29 | O2 | NMI |
| 30 | R/W | SYNC |
| 31 | ||
| 32 | 0V | 0V |
The Backplane also has connections for off board mounted LED's and switches if you don't want to mount them on front panels.
I have also included a Logic Analyser port which I used with my Diligent Discovery 2 during the early stages of the project to see if it was working, otherwise difficult with no user interface.
Connections to the Logic Analyser Port are as follows:
| 0V | 0V |
| A4 | A0 |
| A5 | A1 |
| A6 | A2 |
| A7 | A3 |
| 0V | 0V |
| A12 | A8 |
| A13 | A9 |
| A14 | A10 |
| A15 | A11 |
| 0V | 0V |
| D4 | D0 |
| D5 | D1 |
| D6 | D2 |
| D7 | D3 |
| 0V | 0V |
Schematic
Bill Of Materials
PCB
