This project contains Schematics and PCBs for the ReA4091 board, which is a reimplementation of the Commodore A4091 SCSI controller for the A4000 and A3000.
In the easyeda/ directory you will find the PCB and schematics files in
EasyEDA's json format. You can load these files into your EasyEDA instance to
work on them.
| Filename | Explanation |
|---|---|
| ReA4091_RevX_YYYY-MM-DD_PCB.json | PCB |
| ReA4091_RevX_YYYY-MM-DD_SCH.json | Schematics |
The BOM is available as a CSV file exported by EasyEDA. You can also check out the Interactive BOM.
Upload the Gerber Zip file to the manufacturing house of your choice. NOTE: You will most likely see the price increase after a manual review of the design because the integrated active SCSI-2 terminator is considered a second design.
When ordering PCBs, the following values are suggested.
- PCB thickness: 1.6mm
- Layers: 4
- L1 (Top layer):
Gerber_TopLayer.GTL - L2 (Inner layer 1):
Gerber_InnerLayer1.G1 - L3 (Inner layer 2):
Gerber_InnerLayer2.G2 - L4 (Bottom layer):
Gerber_BottomLayer.GBL
- L1 (Top layer):
- Different Designs: 2
- Surface finish: ENIG
- Gold Fingers: Yes
- 45 degree finger chamfered: Yes
- Material Type: FR-4 TG155
- Remove Order Number: Yes
- High-definition Exposure Silkscreen
There are three variants of PickAndPlace files in this repository:
- ReA4091_RevX_YYYY-MM-DD_PickAndPlace.csv
- ReA4091_RevX_YYYY-MM-DD_PickAndPlace_panelized_coordinates.csv
- ReA4091_RevX_YYYY-MM-DD_PickAndPlace_panelized_coordinates_mirror.csv Please discuss with your fab house which one to use.
The schematics/ directory contains the latest schematics in PDF format.
NOTE: The design has two footprints for a polyfuse: F309A is a through-hole footprint and is the same as what Commodore and DKB used in their original boards (the big yellow coin). If you prefer a sleeker look, it is recommended to go with an SMD polyfuse on F309B instead. Do not stuff both.
For the ROM using a Winbond W27C512 is highly recommended as it is an EEPROM version that can be erased without an ultraviolet light box.
For the GALs, we have used ATF22V10-10 parts for all parts except for U306 and U205. If you use Atmel GALs for those two parts, the card will NOT work correctly.
- U306 should be a Lattice 22V10-5 or 22V10-6 (-10 will work in many instances).
- U205 should be a Lattice 22V10-15 part.
If you are familiar with WinCUPL and/or the Zorro III bus protocol, and can help us debug why Atmel parts don't work in these positions, please contact us
The hardware files in this repository are released under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
