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JAQ's Blog - Electronics, Microcontrollers, DEC Minicomputers, Raspberry Pi, Airplanes and other stuff....
Total: 40 results found.
Page 1 of 2
TRS-80 Model 1 Keyboard Repair
If you have been involved with retro
s for any time, the chances are very high that a machine that worked perfectly when last used has now developed a new fault (or two or more.....). ...
SD-Systems SBC-200 Testing - Part 2
In the earlier post I wrote about testing an SD-Systems SBC-200 single board
for the S-100 bus using my Northstar Horizon mainframe. The end result of that testing was that the board seemed ...
SD-Systems SBC-200 Testing - Part 1
One of the challenges with retro-computing is knowing which of the many new/untested components you are trying is causing the headache. My friend Philip was having just this problem with his SD-Systems ...
Living Computer Museum - VAX 11/780
Living Computer Museum - DEC PDP-12
Living Computer Museum - Data General Nova
Living Computer Museum - DEC TU56 and RK05
Living Computer Museum - Altair 8800
Living Computer Museum - DEC PDP-8e
Living Computer Museum - DEC SYSTEM 20
Living Computer Museum - DEC Rainbow 100
Replacing 2708 EPROM with 28C16 EEPROM
s is sure to mean dealing with old EPROMs. Many restorers have a modern EPROM programmer (i.e it was cheap, made in China and I got it on eBay) or two but there ...
Living Computer Museum - Control Data Corporation 6600
Living Computer Museum - DEC PDP-11
DECUS NOPSIG Posters
The following DECUS NOPSIG posters were produced around 1990. I was recent given copies in perfect condition so have uploaded them to archive.org as TIFF files suitable for reprinting. Click ...
Northstar Horizon Repair
In mid 2015 I was lucky enough to acquire a Northstar Horizon
from a fellow collector who was disposing of his equipment. After seeing my father work with MDL (MicroProcessor ...
IOT for the Small Block - Part 1
There has been much written about IOT (Internet of Things..... devices that we wouldn't initially think of as
s connected to the internet.... smart thermometers, refrigerators, coffee machines, ...
MS11-JP MOS Memory SN#1958348/78
The MS11-JP (M7847-DJ) is a MOS memory board for Unibus PDP11's. In the PDP11/04 I am restoring there are two fully populated boards, each with 32K words of dynamic memory.... and neither board works ...
Kaypro 4/83 Floppy Disk Woes.....
I have written in earlier posts of my project to interface the FreHD hard disk emulator to my Kaypro 4/83. The standard Kaypro ROM does not include hard disk support so a third party ROM ...
Computer Specialists Ltd - CS-16/64 Single Board Computer
A while back I was given a Z80 single board
by Keith (ZL1BQE) when he found out that I really liked the Z80 microprocessor. The board was made in New Zealand by
Specialists Ltd ...
PDP8 SBC6120 FP6120
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