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JAQ's Blog - Electronics, Microcontrollers, DEC Minicomputers, Raspberry Pi, Airplanes and other stuff....
Total: 45 results found.
Page 1 of 3
TRS-80 Model 1 Keyboard Repair
... This happened to me recently with a TRS-8
Model 1. In the time I have had the machine it has been very reliable. I pulled it out of storage after 6 months to do some testing with the ...
SD-Systems SBC-200 Testing - Part 2
In the earlier post I wrote about testing an SD-Systems SBC-2
single board computer for the S-1
bus using my Northstar Horizon mainframe. The end result of that testing was that the board seemed ...
SD-Systems SBC-200 Testing - Part 1
. The SBC-2
is a Z-8
based single board computer for the S-1
bus as is described on www.s1
computers.com Philip had spent a couple of months trying to get either of his ...
Living Computer Museum - VAX 11/780
Living Computer Museum - DEC TU56 and RK05
Living Computer Museum - Altair 8800
Living Computer Museum - DEC SYSTEM 20
Living Computer Museum - DEC Rainbow 100
Replacing 2708 EPROM with 28C16 EEPROM
... is a very good chance that neither will write (or even read) older parts even if the "supported parts list" suggests they will. I ran into this problem with the 27
8 EPROM on the Northstar ZPB Z8
Living Computer Museum - Control Data Corporation 6600
DECUS NOPSIG Posters
The following DECUS NOPSIG posters were produced around 199
. 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 2
15 I was lucky enough to acquire a Northstar Horizon computer from a fellow collector who was disposing of his equipment. After seeing my father work with MDL (MicroProcessor ...
TRS-80 Model 1 FreHD Expansion Interface
Fred Vecoven's FreHD Hard Disk emulator has been a very popular upgrade for TRS-8
Model 3 and 4 users since its launch in 2
14. If you have a Model 1 with a Radio Shack expansion interface ...
MS11-JP MOS Memory SN#1958348/78
The MS11-JP (M7847-DJ) is a MOS memory board for Unibus PDP11's. In the PDP11/
4 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.....
... KayPlus ROM worked but there were a few odd behaviours running some CP/M applications that needed further investigation. In May 2
14 a Kaypro II was purchased from eBay by phorgen on the Vintage Computer ...
GPS Connection to Hans Summers Ultimate 3 QRSS Kit
A few years back I built a QRSS transmitter (for slow morse and WSPR) based on a recycled DLink DSL-5
2T router running OpenWRT and connected to an Si57
DDS module. (http://www.quicktrip.co.nz/jaqblog/home/44-si57
TRS80 Model 4P FreHD Installation
Following on from the post about the Model 4 FreHD installation, here are a few pictures showing the installation of a FreHD Hard Disk Emulator in my TRS-8
Model 4P. The mounting chassis is the ...
TRS80 Model 4 Internal FreHD Install
A few pictures showing the installation of a FreHD Hard Disk Emulator in one of my TRS-8
Model 4's. The mounting chassis is the frame from a dead Seagate ST4766N hard drive. I picked ...
Computer Specialists Ltd - CS-16/64 Single Board Computer
A while back I was given a Z8
single board computer by Keith (ZL1BQE) when he found out that I really liked the Z8
microprocessor. The board was made in New Zealand by Computer Specialists Ltd ...
1 is a ROM/Terminator board for Unibus PDP11's. In the PDP11/
4 the PROMs on this board provide the boot loader and programmers console code. The PROMs are mapped into two address ...
PDP8 SBC6120 FP6120
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