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@penguin42@mastodon.org.uk
2026-08-08 14:23:20

Added a heatsink to my Beeb's video ULA as well as the CPU and 245. And here's Frenzy running from Replica now that I sorted that double stepper out.
#retrocomputing

A BBC B motherboard showing various chips; on top of the CPU, the 74LS245 and Video ULA are bodged heatsinks held on by a wiretie, some glue and a dab of compound.
A blurry screen shot of the game 'frenzy' on a modern LCD monitor; it's blurry because the monitor doesn't like interlace. The play area is a rectangle and you draw boxes to try and trap a moving line;  it's basically a clone of QIX.
@jamie@boothcomputing.social
2026-09-06 22:25:37

Got my digitizer setup on my 486 and it's working in Microstation. Lot of nostalgia for this particular config.
#retrocomputing
#microstation
#cad

picture of an LCD with a black screen and the  handmade words "Hi, Mastodon".  below that is a 1990's gateway 2000 keyboard and a large Summagraphics II digitizer board.  a hand is holding the 4-button pointer.  some other retro systems are visible to each side.
@penguin42@mastodon.org.uk
2026-09-06 13:34:41

Got one of my Sun3's open - no life yet - but they don't look too bad; look at that BBC Engineering sticker; and they're neighbouring serial numbers on the machines - these are siblings! Few fun board bodges.
#retrocomputing #suntember

A Sun3 mainboard - at the back there are 24 SIMM slots, 20 of them are filled with 1MB simms  It's big - it drawfs the 68020 in the middle.  To the bottom right is the graphics card.
A PAL with one of it's pins obviously cut
The back showing the serial numbers
The other side of hte back showing the video sockets an unusual huge (68pin?) D scsi, and a 'BBC Engineering chiswick - Audio section' sticker.
@trezzer@social.linux.pizza
2026-08-31 21:02:44

Anyone know of a source for A1078 Powerbook batteries? All links I've followed have been dead/OOS and my G4 won't power on at all any more. It's a NoPowerbook :( #retrocomputing

@stsquad@mastodon.org.uk
2026-07-01 19:58:25

You know it's serious #history when you get a blue plaque. #edsac #retrocomputing
BBC News - Blue plaque awarded for Cambridge computer creation:

Blue plaque celebrating EDSAC on the 6th May 1949
@kcase@mastodon.social
2026-09-08 18:30:53

This was my NeXT Mail avatar at that time, back in 1992. (64x64 pixels with 4 bits of each color channel per pixel (444 RGB) felt like a pretty high quality image in that era!)
The self-photo was taken in NeXT's sales office at Carillon Point in Kirkland, where Omni's founders were working as consultants (across the lake from Seattle), by hooking up a camcorder's video output to the video input on a NeXTdimension board.
#NeXTSTEP #retrocomputing

@penguin42@mastodon.org.uk
2026-09-05 13:01:45

I've just extracted my #suntember projects from the bottom of the pile. A pair of Sun 3/60's. They weigh 12kg each - I guess the case was designed to withstand the weight of the monitors.
#retrocomputing

A stack of old Unix workstations on a trolly.  From top to bottom; an SGI Indy, a Sun Ultra 1, an HP 9000/735 and two Sun 3/60's.  In front is the corner of a Sun3 optical mouse mat and keyboard.  They're sitting on a black dolly.
@thomasfuchs@hachyderm.io
2026-06-15 15:04:04

Anyone familiar with DOSBox and crashes of Windows 3.11 apps?
This app installed fine but it's throwing this. I tried a few different CPU settings in DOSBox but it happens regardless if it's a 486 or Pentium or whatever.
#retrocomputing

@mikejolley@social.linux.pizza
2026-06-15 15:35:33

Been working on a Toshiba Satellite T1910 (vintage laptop) which had a dodgy floppy drive. 2 drives and 2 goteks later I've worked out the issue was the flat ribbon cable I was using! 🤦‍♂️ Needs to be the twisted type; pins are reversed. Will defo write this up for other poor souls when I'm done! #retrocomputing

@penguin42@mastodon.org.uk
2026-06-28 11:30:56

Screenshots of my beeb series 7 yesterday booting off my restored Cumana floppy drive. The last one, the Teletext editor is I think by my high school Maths Teacher at the time.
#retrocomputing

A 'Clares Replica' menu screen on a LCD monitor, showing classic Beeb games like Monsters, Snapper, Rocket Raid, and a few others.
Acornsoft Snapper loading page in Teletext mode showing the Acornsoft logo in red/green/yellow/blue.
Teletext Pages editor (c) Barry E Allen with F keys to run/help etc
@jamie@boothcomputing.social
2026-08-15 23:38:03

Today my CAD digitizer arrived. I'm going to pair that with my 486 running Microstation 5.0.
Then, unexpectedly, I went to my #retrocomputing meetup and somebody just dropped a gift for my PS/2 model 30 286 in my lap - a 386 upgrade RAM expansion card. I had no idea what it was, but it was like new and had all the manuals and disks.
[edit: actually add the pictures…

a SummaGraphics SummaSketch II Professional Plus with 4-button pointer, serial cable and power adapter sit on a black rolling chair.
an Intel PowerPack i386sx upgrade for 286 machines.  this one is for a PS/2 Model 30 286.
@penguin42@mastodon.org.uk
2026-08-25 17:53:21

Found him! The master mouse was hiding at the back of a shelf and still works in GEM (which is pretty grim running off floppies here). This mouse plugs into the Master's User port.
#retrocomputing

A BBC Master mouse; a small beige mouse with two  long brown/black eyes.
A GEM Write window with a line of text.
@jamie@boothcomputing.social
2026-06-13 23:09:52

Watch me clear off my dining room table and reassemble a Toshiba Satellite T2130CT from 1993.
#retrocomputing

@penguin42@mastodon.org.uk
2026-08-24 12:47:42

Good; my Master is now a Master 512 again - it can see the copro OK, now I just need to find where I put the boot floppies last century. (Hmm and I wonder if we still have the mouse?)
Bonus: Interword running from the cartridge slot.
#retrocomputing

A screen shot showing 'Acorn TUBE 80186 512K' 'BASIC' and then a Disc error
A screenshot showing the working screen of 'Interword' - it's a black and white screen with a line at the top, then a ruler marking out text columns, then text ''This is Interword!' which I typed and then a fill at the bottom.
@thomasfuchs@hachyderm.io
2026-06-29 12:20:34

who did it best?
#retrocomputing

@penguin42@mastodon.org.uk
2026-08-22 13:17:00

With the RIFAs replaced, next is the Master 512's battery pack; hmmmm - luckily the battery pack kept it away from the PCB
#retrocomputing

A 3 cell battery pack sits on a bench attached to a bracket with some yellow tape.  There's white furry deposits around it, one of the contacts is very green. They were Duracell batteries.
@enriquericos@mastoart.social
2026-08-06 19:44:36

I had forgotten I had The Oldschool PC Font Resource installed and now I want to use every single font:
#typography #fonts #retrocomputing #graphicDesign

@penguin42@mastodon.org.uk
2026-08-21 17:13:02

Oh hello there, you're going to be forcefully replaced:
#retrocomputing

A cracked dodgy looking RIFA capacitor on a BBC Master PSU surrounded by some other components.  You can tell it's worried about it's future.
@thomasfuchs@hachyderm.io
2026-06-28 21:00:27

Lazy Sunday (Commodore 64-style)
made with @…
#retrocomputing

@penguin42@mastodon.org.uk
2026-08-11 14:12:37

Ooh, found my dad's slide rule; I guess I have to learn how to use it now!
#retrocomputing

A slide rule, with my dads name written on the inside of the slide.
It's got various scales on (including x^2 and 1/x) and has a nice red box for it to go in.
@penguin42@mastodon.org.uk
2026-07-12 13:38:47

My beeb series 7 was having heat problems, so I bodged some heatsinks onto the CPU and onto the infamous 245 next to it (which was getting well over 50c in a few mins)
The series 7 case has the back vent mostly covered to stop junk going in.
Hmm the wire ties aren't really satisfactory.
#retrocomputing

A photo of the CPU socket in a BBC B - a 40 pin DIP, under which is the easter-egg 'Bob's board'
A picture of my Beeb now with bodged bent mettle heatsinks on the 6502 and neighbouring 245.  Held on vaguely by wireties.
@thomasfuchs@hachyderm.io
2026-07-27 02:45:17

Did you know? IBM stands for “Itty Bitty Machines”
#retrocomputing

@losttourist@social.chatty.monster
2026-07-27 08:02:18

I also lust after the Commodore-64 version of the keyboard. Absolutely identical to the others, but that colour scheme and font!
#8bit #RetroComputing #C64 #Commodore64

@penguin42@mastodon.org.uk
2026-08-20 13:47:40

My Acorn BBC Master 512; that's a BBC Master with an added 80186 copro (which is the board in the middle).
Hmm first time I've had the top off in ages, I guess I should check it's batteries and PSU; there doesn't seem to be any crud around the batteries.
It's got a little board from CJE which I think lets you switch in the extra EPROM sockets vs extra RAM.
#retrocomputing

A BBC Master 512 computer - beige case, BBC keyboard with the Red function keys, (but with the arrow keys in a different orientation to a Model B) and a numeric keypad.  Two cartridge slots on the right are empty.   It has two small added switches on the back right.  On top are the 'Welcome Guide' (for a base Master 128) and 'Master 512 user guide'
The top off the BBC Master 512 - in addition to the dust, we have the Master PSU, the CMOS battery pack, the Master 512 copro in the middle, fly leads going off to the switches, the speaker and cartridge slots, and some EPROMs.
@thomasfuchs@hachyderm.io
2026-07-25 03:32:04

I’d pour one out for VARTA today, but they’re doing that by themselves
#iykyk #retrocomputing

@penguin42@mastodon.org.uk
2026-07-15 14:02:17

Just typed in a RAM test program on my Series 7 BBC Model B - it passes clean; hmm - doesn't explain the instability then.
Also, I don't seem to be able to (reliably?) write to a floppy - hmm. save file, *. and find it's nto there. Hmm. Tried formatting and it's verifying bad. So some more debug todo.
(Also, hth did I type so much on a Model B keyboard, the keys are HARD)

@thomasfuchs@hachyderm.io
2026-08-22 14:39:07

Does anyone (in US) have a spare SCSI HDI-30 (male) to DB-25 (female) adapter or cable lying around? I'd be happy to pay postage.
It's to connect a BlueSCSI to 1990s-era PowerBooks.
(eBay sellers want fantasy prices.)
#retrocomputing #powerbook

@losttourist@social.chatty.monster
2026-07-27 08:00:57

I've just learned that #8bitdo have released an #IBM #ModelM edition of their fabulous range of retro keyboards and I am definitely here for it!
#RetroComputing

@losttourist@social.chatty.monster
2026-06-16 17:06:05

This prediction from The Micro User magazine in January 1985 about where home computers might go, and how computer-touchers might still have different attitudes than the rest of the population, turns out to not actually be a thousand miles short of the mark.
#Retrocomputing #BBCmicro #futurism #TheMicroUser