Building New Retirement Homes for Vintage Chips
All boards on the Bits of the Golden Age site are open source projects with the build files available for download. We encourage people to submit the build files directly to their favorite PCB job shop and then share the extra boards with local enthusiasts. To make sure that you are building the latest version, here is the status of the various circuit boards. Before submitting the build files to your PCB house, please check the version number to make sure you are submitting the intended version.
I am getting a number of purchases from overseas buyers that want in on the SBC-85 system,......
Not too long ago I came across a couple of unbuilt Solid State Music CB1A, 8080 based,......
I have populated and have nearly completed my testing of the intellec 8 imm8-82 8008 CPU board,......
Now that the companion imm6-26 PROM board is tested, it is time to move onto testing the......
After the SIM4 and SIM8, Intel began introducing the intellec series of Microcomputer Development Support equipment, first......
I mentioned in an earlier post that the first 8085 system I ever created was the Intel......
It took me a while, but I finally got back to the STD-85 project and have completed......
I needed a STD bus pad-per-hole prototyping card and it seems useful enough to take the trouble......
A few months ago, my new buddy Will sent a couple of Mostek MK38P70 microcontrollers and suggested......
I have decided to port the SBC-85 8085 CPU board over to STD Bus. I am......
Charles in Tennessee was having trouble with his USB to RS232 adapters working with his version 2......
Version 1.0 of the Serial, Parallel I/O board features RS232 up to 19.2K, 24 pins of I/O......
Well, I really pulled a boner by not reading the RTC specification sheet for the SPIO board......
An easy derivative of the SPIO (Serial, Parallel I/O) board is a version that has an I2C......
Someone in the SBC-85 community came across the mother lode of quad flat pack 80C85 chips and......
The four channel memory expansion board is now available for download. It is also available on Tindie,......
The Digital I/O Port prototyping boards have arrived an they look good so I am releasing the......
The SBC-85 backplane prototyping board has been a hit and, at least from what moves through here,......
With every job at the PCB fab I like to include a prototype of a new design.......
UPDATE: The SBC-85 CPU v2 is now available. Those that do not have 21V programmers for the......
During assembly or development of a bubble memory system, it is safer and more convenient to use......
The 7110A 1Mbit bubble board is on Tindie for purchase. This board will also work with the......
Curious about the condition of bubbles that I have seen available for sale, I decided to take......
Hey-laaaaa. Day-laaaaaa. My bubble’s back A quick update on the 7110A bubble board that arrived from the......
Additional memory is always useful, so one of the next projects is a memory expansion board. It......
The first “real” version of the SBC-85 1 Mbit bubble board is about ready to go to......
Populating the SBC-85 1 megabit bubble memory board was straightforward, firing it up only slightly more complicated.......
As an undergraduate I was in a very small department where the students were very closely knit......
I have been having a great deal of fun building and now testing version 1.1b of the......
I just realized that I have not given an update on the Cassette Tape Interface board. The......
The SBC-85 100mm x 100mm pad-per-hole Protoboard v1.0b has been received, inspected, and its files are being......
One tool for a healthy hardware user group is the ability for the users to create,......
I have a standard set of confidence tests in assembly that I port over to different systems......
There is a key point regarding the data breakpoint that I have glossed over but it will......
I am getting more excited by the hour while building the SBC-85 Bus Monitor Board and so......
Update on version 1.1 of the SBC-85 CPU board that just arrived—- Rather than tease out the......
I have completed building the first Backplane-4 and happy to report that i have not found any......
The last mile of power lines, telephone lines, and other similar infrastructure is the most difficult to......
For those that can’t remember things like glass shampoo bottles and paper straws, the “100% Plastic” claim......
Version 1.0 of the SBC-85 CPU board has been uploaded to PCBWAY and OSHPARK as a shared......
I have been asked a number of times if I can recommend an EDA package for other......
Great news today when Dave Dunfield gave permission to port his MON85 code over to the SBC-85......
I have at least a dozen EPROM programmers but most of them are vintage and less than......
Hardware interrupts are simply signal inputs that are monitored by the CPU and when one (or more)......
You may question the need for the R8 and R9 pull-up resistors on the RD* and WR*......
When writing software, and even when developing hardware for systems like the 8085 based single board computer,......
As soon as a system is built, it seems that I will already will want to expand......
When compared to its predecessor , the Intel 8080, the 8085 is a powerful standalone system no......
While creating the schematic for the SBC-85 CPU board I sort of went too far when connecting......
From the time I wire-wrapped my first 8085 3-chip system (8085, 8155, 8755) I was hooked on......
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