Sinclair Research
@sinclairresearch.bsky.social
Customer support for your ZX80, ZX81 and other classic hardware. We’re sorry to tell you that your warranty has expired.
Spent most of Boxing Day building this but didn't have a battery to put in it. Thankfully the shops are open today *
* In a parallel universe
* In a parallel universe
December 27, 2025 at 3:46 PM
Spent most of Boxing Day building this but didn't have a battery to put in it. Thankfully the shops are open today *
* In a parallel universe
* In a parallel universe
Happy Christmas!
December 25, 2025 at 9:19 PM
Happy Christmas!
Reposted by Sinclair Research
If you need some more festive decorations for Christmas, why not power up your #JupiterAce/ #Minstrel4th and run AceSnow (inspired by Xsnow which adorned my Unix workstation in December for much of the 1990s). #retrogaming github.com/markgbeckett...
December 24, 2025 at 6:18 PM
If you need some more festive decorations for Christmas, why not power up your #JupiterAce/ #Minstrel4th and run AceSnow (inspired by Xsnow which adorned my Unix workstation in December for much of the 1990s). #retrogaming github.com/markgbeckett...
Reposted by Sinclair Research
1982 - ZX81 with a wobbly 16K ram pack.
My life changed forever. 😍
My life changed forever. 😍
December 22, 2025 at 6:08 PM
1982 - ZX81 with a wobbly 16K ram pack.
My life changed forever. 😍
My life changed forever. 😍
Reposted by Sinclair Research
New blog post: Faster isn't always better - A Cautionary Tale.
blog.tynemouthsoftware.co.uk/2025/12/fast...
An unexpectedly seasonal post, the red and green in the first photo looking very festive, piles of presents, and the feature charts from Microchip looking like they got them out of a cracker.
blog.tynemouthsoftware.co.uk/2025/12/fast...
An unexpectedly seasonal post, the red and green in the first photo looking very festive, piles of presents, and the feature charts from Microchip looking like they got them out of a cracker.
December 21, 2025 at 1:38 PM
New blog post: Faster isn't always better - A Cautionary Tale.
blog.tynemouthsoftware.co.uk/2025/12/fast...
An unexpectedly seasonal post, the red and green in the first photo looking very festive, piles of presents, and the feature charts from Microchip looking like they got them out of a cracker.
blog.tynemouthsoftware.co.uk/2025/12/fast...
An unexpectedly seasonal post, the red and green in the first photo looking very festive, piles of presents, and the feature charts from Microchip looking like they got them out of a cracker.
Reposted by Sinclair Research
Did you know that the first instruction in the ZX Spectrum ROM is DI - Disable Interrupts. Quite a dramatic entrance. The DI instruction was not used in the ZX80 and ZX81.
Here is my ZX80 assembly listing from 2002. I tried to use the Logan O’Hara labels when apt.
web.archive.org/web/20150501...
Here is my ZX80 assembly listing from 2002. I tried to use the Logan O’Hara labels when apt.
web.archive.org/web/20150501...
Assembly Listing of the Operating System of the Sinclair ZX80.
web.archive.org
December 20, 2025 at 2:22 AM
Did you know that the first instruction in the ZX Spectrum ROM is DI - Disable Interrupts. Quite a dramatic entrance. The DI instruction was not used in the ZX80 and ZX81.
Here is my ZX80 assembly listing from 2002. I tried to use the Logan O’Hara labels when apt.
web.archive.org/web/20150501...
Here is my ZX80 assembly listing from 2002. I tried to use the Logan O’Hara labels when apt.
web.archive.org/web/20150501...
Reposted by Sinclair Research
Surprisingly (well surprising to me anyway) it was only dissolved in October this year. I'd've thought they'd've done than when he passed, but maybe there was a lot of stuff to deal with before it could be wound up? find-and-update.company-information.service.gov.uk/company/0113...
SINCLAIR RESEARCH LIMITED overview - Find and update company information - GOV.UK
SINCLAIR RESEARCH LIMITED - Free company information from Companies House including registered office address, filing history, accounts, annual return, officers, charges, business activity
find-and-update.company-information.service.gov.uk
December 19, 2025 at 8:57 PM
Surprisingly (well surprising to me anyway) it was only dissolved in October this year. I'd've thought they'd've done than when he passed, but maybe there was a lot of stuff to deal with before it could be wound up? find-and-update.company-information.service.gov.uk/company/0113...
Sinclair Research Year in Review
New computers released: 0
Annual sales income: £0
Outgoings: £0
New computers released: 0
Annual sales income: £0
Outgoings: £0
December 19, 2025 at 8:45 PM
Sinclair Research Year in Review
New computers released: 0
Annual sales income: £0
Outgoings: £0
New computers released: 0
Annual sales income: £0
Outgoings: £0
It's now too late to look through the Grattans catalogue and let Santa know what you'ld like them to pay off in monthly instalments.
December 18, 2025 at 6:36 PM
It's now too late to look through the Grattans catalogue and let Santa know what you'ld like them to pay off in monthly instalments.
If you had a ZX81, I bet you had Scalextric too. Right?
December 16, 2025 at 10:39 PM
If you had a ZX81, I bet you had Scalextric too. Right?
Flight sim at home.
December 16, 2025 at 4:52 PM
Flight sim at home.
Reposted by Sinclair Research
ZX History - December 1980: The 1K ZX80 gets its 16K RAM Pack.
READ: https://archive.org/details/PersonalComputerWorld1981-01/page/118/mode/2up?view=theater #zxspectrum #retrogaming
READ: https://archive.org/details/PersonalComputerWorld1981-01/page/118/mode/2up?view=theater #zxspectrum #retrogaming
December 9, 2025 at 8:05 PM
ZX History - December 1980: The 1K ZX80 gets its 16K RAM Pack.
READ: https://archive.org/details/PersonalComputerWorld1981-01/page/118/mode/2up?view=theater #zxspectrum #retrogaming
READ: https://archive.org/details/PersonalComputerWorld1981-01/page/118/mode/2up?view=theater #zxspectrum #retrogaming
Reposted by Sinclair Research
Reposted by Sinclair Research
Hmm.. Looking at the calendar, I guess now is the time to say..
If you want something from www.tfw8b.com/shop/ to be delivered before #xmas, you should probably order your #8bit thing via express shipping NOW!
#Commodore64 #CommodoreVIC20 #SinclairSpectrum #AndMore
If you want something from www.tfw8b.com/shop/ to be delivered before #xmas, you should probably order your #8bit thing via express shipping NOW!
#Commodore64 #CommodoreVIC20 #SinclairSpectrum #AndMore
December 10, 2025 at 10:34 AM
Hmm.. Looking at the calendar, I guess now is the time to say..
If you want something from www.tfw8b.com/shop/ to be delivered before #xmas, you should probably order your #8bit thing via express shipping NOW!
#Commodore64 #CommodoreVIC20 #SinclairSpectrum #AndMore
If you want something from www.tfw8b.com/shop/ to be delivered before #xmas, you should probably order your #8bit thing via express shipping NOW!
#Commodore64 #CommodoreVIC20 #SinclairSpectrum #AndMore
Reposted by Sinclair Research
New blog post, that moment when it goes from "Yay! I sold one" to "Oh, now I have to write the documentation"
blog.tynemouthsoftware.co.uk/2025/12/i-so...
Or, how many times do I need to redraw this schematic until I am happy with it?
blog.tynemouthsoftware.co.uk/2025/12/i-so...
Or, how many times do I need to redraw this schematic until I am happy with it?
December 14, 2025 at 12:34 PM
New blog post, that moment when it goes from "Yay! I sold one" to "Oh, now I have to write the documentation"
blog.tynemouthsoftware.co.uk/2025/12/i-so...
Or, how many times do I need to redraw this schematic until I am happy with it?
blog.tynemouthsoftware.co.uk/2025/12/i-so...
Or, how many times do I need to redraw this schematic until I am happy with it?
The Computer History Museum wrote to tell me that details on the ZX Spectrum have been corrected. If you're at the CHM in California in the near future, you can check that the price is no longer $750!
December 12, 2025 at 4:15 PM
The Computer History Museum wrote to tell me that details on the ZX Spectrum have been corrected. If you're at the CHM in California in the near future, you can check that the price is no longer $750!
Reposted by Sinclair Research
Módem wifi para TS 2068 - versión 3 😎
Creado por Jorge Castillo, el módem se conecta a cualquiera de los puertos de joystick y requiere 4 transistores y un módulo ESP8266 con firmware zimodem.
#ts2068 #timex #8bit #homecomputer #retrogamer #retrocomputacion #sinclair #timexsinclair #retrocomputing
Creado por Jorge Castillo, el módem se conecta a cualquiera de los puertos de joystick y requiere 4 transistores y un módulo ESP8266 con firmware zimodem.
#ts2068 #timex #8bit #homecomputer #retrogamer #retrocomputacion #sinclair #timexsinclair #retrocomputing
May 31, 2025 at 9:20 PM
Módem wifi para TS 2068 - versión 3 😎
Creado por Jorge Castillo, el módem se conecta a cualquiera de los puertos de joystick y requiere 4 transistores y un módulo ESP8266 con firmware zimodem.
#ts2068 #timex #8bit #homecomputer #retrogamer #retrocomputacion #sinclair #timexsinclair #retrocomputing
Creado por Jorge Castillo, el módem se conecta a cualquiera de los puertos de joystick y requiere 4 transistores y un módulo ESP8266 con firmware zimodem.
#ts2068 #timex #8bit #homecomputer #retrogamer #retrocomputacion #sinclair #timexsinclair #retrocomputing
Reposted by Sinclair Research
I had a Timex Sinclair 1500 (around 1983?). I bought the upgrade over the TS1000 because it had those rubber keys and a full 16k of memory. I remember ordering games that came on cassettes. You could see the whole program once you loaded the game and making mods was how I got started with coding.
December 1, 2025 at 4:34 AM
I had a Timex Sinclair 1500 (around 1983?). I bought the upgrade over the TS1000 because it had those rubber keys and a full 16k of memory. I remember ordering games that came on cassettes. You could see the whole program once you loaded the game and making mods was how I got started with coding.
Reposted by Sinclair Research
OpenSpand – an expansion board for Sinclair ZX81, Timex Sinclair 1000, or clone « Adafruit Industries – Makers, hackers, artists, designers and engineers! blog.adafruit.com/2025/12/08/o...
blog.adafruit.com
December 9, 2025 at 3:52 PM
OpenSpand – an expansion board for Sinclair ZX81, Timex Sinclair 1000, or clone « Adafruit Industries – Makers, hackers, artists, designers and engineers! blog.adafruit.com/2025/12/08/o...
Reposted by Sinclair Research
Reposted by Sinclair Research
Catacombs (1982) was a dungeon crawling RPG with roguelike elements for the Sinclaire ZX81. Players explored a random dungeon autobattling monsters, constantly losing strength (health), and tried not to insta-die in traps that tested how lucky you were with number guessing. (a hungry quest thread)
December 11, 2025 at 12:00 AM
Catacombs (1982) was a dungeon crawling RPG with roguelike elements for the Sinclaire ZX81. Players explored a random dungeon autobattling monsters, constantly losing strength (health), and tried not to insta-die in traps that tested how lucky you were with number guessing. (a hungry quest thread)
Reposted by Sinclair Research
