Above shows the TV that was used for output. Below shows the keyboard, a Radio Shack kit that I modified.

2650 Mark I (continued)    Here are some photos taken in March 1979 of my personal computer derived from the Radio-Electronics article. I’m the one in the white shirt with my friend Geoffrey Barkham wearing a jacket. Geoffrey was also interested in electronics and computers.

I’m the one in the white shirt with my friend Geoffrey Barkham wearing a jacket. Geoffrey was also interested in electronics and computers.

Here are some photos taken in March 1979 of my personal computer.

Above is a photo of the front panel that I designed and constructed from scratch. It was the only input and output in the early days. It had 16 address switches and LEDs (Light Emitting Diodes), 8 data switches and LEDs and several control switches and LEDs.

Above centre is a photo of me operating the front panel. Notice the old stalwart Model 7 Universal AvoMeter keeping an eye on the power supply voltages. Having invested hundreds of dollars in chips, I was always worried that a power supply malfunction would sent it all up in smoke!

At right is an overhead photo of the computer. The power supply is on the right, the S-100 boards are the long ones towards the top of the photo and there are a couple of Radio Shack 4.25” boards in the foreground. The ribbon cables coming from one of them connect to the keyboard and to the cassette tape recorder.

Click on any photo to see a larger version.