MarsMan2020
Experienced Member
Hello VCF DEC group!
Recently I've been working on a project to take the SBC6120 design/source files provided by Robert Armstrong on the Spare Time Gizmos website and create a new version of the board.
I'm calling this the 'SBC6120-RetoBrew Computers Edition' and there is a wiki page for the board here on the RBC wiki
We've gone through 2 versions of prototypes - 6 of us built rev 0.99 prototype boards and I've built 1 rev 1.00 board - and final testing of the 1.00 prototype board with a STG FP6120 will be getting underway soon.
Notable differences from the original STG boards include:
-Routed as a 2-layer PCB
-SRAM changed to Qty 2 128k x 8-bit AS6C1008's
-LED display footprint updated to allow use of square LEDs + resistors, or the original integrated display unit + wire jumpers
-Reset switch changed to a slight more available part/different footprint
-Added jumpers to allow either 27C256 EPROM or 28C256 EEPROMs
-Added a jumper, fuse, and capacitor to allow power to be supplied to Pin 20 of J20, which can power some IDE->CF adapters
-Changed TP1 into a 2-pin jumper with a ground pin, allowing an external reset switch to be connected
The complete KiCAD and Gerber files are available on the Wiki under the GNU FDL/GPL licenses for anyone who would like to take a look or have some boards made. Thanks to Robert Armstrong for making his designs available!
In addition to the Gerber files, I am going to make a run of the final Rev 1.10 boards soon, as well as put together some IC kits with the HD6120, HD6402, 2 EEPROMs, and 3 GALs. PCBs will be $20, and parts kits will be between $75-$90 depending on how much interest there is & the final cost of parts.
If anyone is interested in getting a few of these boards or a parts kit, you can fill in your information into this Google form - and I'll order parts accordingly and contact you when I have hardware in hand. Since I don't intent to collect any funds until I have hardware in hand and ready to ship - please only put down serious interest! I should be able to get ICs for about 14 more kits - I'll do first come first serve in the order people fill out the form if there is more interest than that & update the form to be PCBs-only accordingly. My plan is to keep the form open until Friday the 28th.
I'll also note that this is strictly a hobby project of mine, with no official association with Spare Time Gizmos - I just thought this group might contain a few interested people. I know there was a thread a while back where a few people bought HD6120 chips.
Andrew B.
Recently I've been working on a project to take the SBC6120 design/source files provided by Robert Armstrong on the Spare Time Gizmos website and create a new version of the board.
I'm calling this the 'SBC6120-RetoBrew Computers Edition' and there is a wiki page for the board here on the RBC wiki
We've gone through 2 versions of prototypes - 6 of us built rev 0.99 prototype boards and I've built 1 rev 1.00 board - and final testing of the 1.00 prototype board with a STG FP6120 will be getting underway soon.
Notable differences from the original STG boards include:
-Routed as a 2-layer PCB
-SRAM changed to Qty 2 128k x 8-bit AS6C1008's
-LED display footprint updated to allow use of square LEDs + resistors, or the original integrated display unit + wire jumpers
-Reset switch changed to a slight more available part/different footprint
-Added jumpers to allow either 27C256 EPROM or 28C256 EEPROMs
-Added a jumper, fuse, and capacitor to allow power to be supplied to Pin 20 of J20, which can power some IDE->CF adapters
-Changed TP1 into a 2-pin jumper with a ground pin, allowing an external reset switch to be connected
The complete KiCAD and Gerber files are available on the Wiki under the GNU FDL/GPL licenses for anyone who would like to take a look or have some boards made. Thanks to Robert Armstrong for making his designs available!
In addition to the Gerber files, I am going to make a run of the final Rev 1.10 boards soon, as well as put together some IC kits with the HD6120, HD6402, 2 EEPROMs, and 3 GALs. PCBs will be $20, and parts kits will be between $75-$90 depending on how much interest there is & the final cost of parts.
If anyone is interested in getting a few of these boards or a parts kit, you can fill in your information into this Google form - and I'll order parts accordingly and contact you when I have hardware in hand. Since I don't intent to collect any funds until I have hardware in hand and ready to ship - please only put down serious interest! I should be able to get ICs for about 14 more kits - I'll do first come first serve in the order people fill out the form if there is more interest than that & update the form to be PCBs-only accordingly. My plan is to keep the form open until Friday the 28th.
I'll also note that this is strictly a hobby project of mine, with no official association with Spare Time Gizmos - I just thought this group might contain a few interested people. I know there was a thread a while back where a few people bought HD6120 chips.
Andrew B.
