LinuxJedi's /dev/null

The ramblings of a Linux Jedi

My Retro Collection

Current Working Machines

BBC Master 128

Acquired viaeBay (Cambridge Centre for Computing History)
Acquisition dateAugust 2020
Work doneCleanup
PSU recap
Current stateWorking!
Possible RAM issue in top 96KB
On loan to Sew Ready
Restoration blog postsBBC Master tag

This BBC Master 128 was acquired in an eBay auction which was to raise funds to keep the computer museum open due to Covid-19. It has a “BBC Radio” branding stamp on it, the history of which is unknown. It is speculated that the machine was used to communicate with broadcasters about incoming callers.

Amiga 500 Plus #1

Acquired viaGumtree
Acquisition dateAugust 2020
Work doneRemoved leaking battery (and cleanup)
Fixed keyboard membrane (caps lock LED)
Replaced rubber feet
Repaired external floppy drive
Replaced internal floppy drive with Gotek
Current stateWorking!
PSU to be rebuilt
UpgradesTerrible Fire TF536 Accelerator
SD Card IDE Interface
Micro SD extension cable
Internal Gotek
IDE LED Exposer board (custom design)
Flash Kickstart Relocator with my custom firmware
Kickstart 3.1.4
Restoration blog postsAmiga 500 Plus #1 tag

This Amiga 500 Plus came with hundreds of disks and many accessories. The accessories alone were worth what I paid for it. I know it had changed hands at least once before and person I had bought it from had never turned it on. It has been fully restored and is my main home Amiga.

Amiga 1200 #1

Acquired viaNorwich Amiga Group
Acquisition dateJanuary 2021
Work doneFloppy drive repaired
Current stateWorking!
UpgradesACA1221lc accelerator
SD to IDE with KA 47 for activity voltage correction
RTC module
Kickstart 3.1.4
Restoration blog postsComing soon!

This Amiga 1200 became available on the Norwich Amiga Group at the end of 2020 and arrived 2nd Jan 2021. It came as the bare unit with a PSU. The machine has yellowed at the front and on the keyboard, the floppy drive was also not working. Internally it is a revision 2B motherboard with Kickstart 3.0.

In-Restoration Machines

Amiga 500 #2

Acquired viaeBay
Acquisition dateSeptember 2020
Work doneRS232 port replaced
A501 shell removed (battery had broken itself off already), sold with A500 #1
RAM chips replaced (fixed yellow screen on boot)
RS232 line driver replaced (MC1488 IC)
74LS373 socketed, but turns out it was still good
Current stateAbout 1/3rd of the keyboard doesn’t work (bad membrane), donor keyboard donated by friend to repair it.
Metal parts are very rusty
Floppy drive faulty (sold off as faulty)
Restoration blog postsAmiga 500 #2 tag

I managed to acquire this Amiga 500 cheap in an eBay auction. It is machine only (no PSU) and appears to have an official trapdoor A501 memory card in it and is going to require a restoration job. It has a rev. 6a board with kickstart 1.3.

Amiga 500 Plus #2

Acquired viaeBay
Acquisition DateSeptember 2020
Work DoneBasic diagnostics
Removed leaking battery
Large corrosion cleanup
New Gary socket (was destroyed by corrosion)
New socket and chip for 74LS244 (damaged by corrosion)
Current stateBlack screen at power up
18 PCB tracks around the 74LS244 found broken
Some passives may need replacing
F-Key missing on keyboard
PSU, keyboard and floppy drive untested
A lot of cleanup needed
Restoration blogsAmiga 500 Plus #2 tag

I acquired this Amiga 500 Plus relatively cheaply on eBay (in fact I was the only bidder!), known faulty on purchase. It was still warranty sealed when I got it, had a 512KB memory card in it (working and now in my first Amiga 500 Plus). It also came with some disks including Workbench and Soccer Kid as well as a foot peddle game controller.

Atari 520 STe

Acquired viaFriend donation
Acquisition DateOctober 2020
Work DoneComing soon
Current StateHangs after a few minutes usage
Restoration BlogsComing soon

A local friend who is into the retro computing scene gave me this Atari 520 STe to repair along with an Amiga 500 shell and keyboard that had yellowed. The Amiga parts will be used for a future project.

I have been told that the Atari has had a 4MB upgrade and since then it hangs after a few minutes of usage. When the original RAM was put back it was still hanging.

Past Machines

Amiga 500 #1

Acquired viaeBay
Acquisition dateAugust 2020
Work doneRemove corroded trapdoor board
Cleanup board corrosion
Cleanup machine
Rebuilt PSU
Replaced damaged resistor
Repaired floppy drive
Replaced keyboard (bad membrane)
Break in PCB trace RST line wire patched
Replaced trapdoor connector
Corrosion removed from metal frame and spray painted primer & gunmetal
Current stateWorking!
Sold on eBay
Restoration blog postsAmiga 500 #1 tag

The Amiga 500 was acquired faulty and rather dirty to give me something to learn to repair Amigas with (and something to play on). It has proved a little bit of a challenge as there has been so many issues with it. But it has now been fully restored. It has a rev. 6a board with kickstart 1.3.

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