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.
Reposted by Sinclair Research
We currently offer over 28 vintage systems for free remote guest access featuring historic operating systems, programming languages and games. BOOTSTRAP members may request personal accounts on these machines. Thank you for supporting icm.museum
#vintagecomputing #retrogaming #retrocomputing
#vintagecomputing #retrogaming #retrocomputing
February 10, 2026 at 5:37 PM
We currently offer over 28 vintage systems for free remote guest access featuring historic operating systems, programming languages and games. BOOTSTRAP members may request personal accounts on these machines. Thank you for supporting icm.museum
#vintagecomputing #retrogaming #retrocomputing
#vintagecomputing #retrogaming #retrocomputing
Reposted by Sinclair Research
"A modern-day concentration camp ... People have been killed by the staff here." Irish citizen Seamus Culleton has been in ICE detention since September, despite having a valid work permit and his own business in the US.
February 10, 2026 at 10:09 AM
"A modern-day concentration camp ... People have been killed by the staff here." Irish citizen Seamus Culleton has been in ICE detention since September, despite having a valid work permit and his own business in the US.
Reposted by Sinclair Research
Age verification?
My first computer:
My first computer:
February 10, 2026 at 5:08 PM
Age verification?
My first computer:
My first computer:
Reposted by Sinclair Research
Sweet! I managed to get this move a sprite using interrupts example working with my own Z80 assembler (needed some slight code upgrades)...I'm very happy! I'll now try something similar with my Pascal -> Z80 cross-compiler!
www.youtube.com/watch?v=V2El...
www.youtube.com/watch?v=V2El...
Interrupts: Z80 Assembly Language for the ZX Spectrum, Episode 12
YouTube video by The Retro Desk
www.youtube.com
February 10, 2026 at 1:48 AM
Sweet! I managed to get this move a sprite using interrupts example working with my own Z80 assembler (needed some slight code upgrades)...I'm very happy! I'll now try something similar with my Pascal -> Z80 cross-compiler!
www.youtube.com/watch?v=V2El...
www.youtube.com/watch?v=V2El...
If you can get the keypresses right on your first try to get CIRCLE on a ZX Spectrum you’re probably old enough for anything.
February 10, 2026 at 3:47 PM
If you can get the keypresses right on your first try to get CIRCLE on a ZX Spectrum you’re probably old enough for anything.
Reposted by Sinclair Research
Age verification?
I've still got my Spectrum ZX81, with 16k ram pack and the games on cassette that only occasionally loaded after 20 minutes of waiting
I've still got my Spectrum ZX81, with 16k ram pack and the games on cassette that only occasionally loaded after 20 minutes of waiting
February 10, 2026 at 2:13 PM
Age verification?
I've still got my Spectrum ZX81, with 16k ram pack and the games on cassette that only occasionally loaded after 20 minutes of waiting
I've still got my Spectrum ZX81, with 16k ram pack and the games on cassette that only occasionally loaded after 20 minutes of waiting
Reposted by Sinclair Research
ZX81 KEYBOARD Subroutine—Commentary https://lobste.rs/s/uxkpk1 ##retrocomputing
ZX81 KEYBOARD Subroutine—Commentary
drj11.github.io
February 10, 2026 at 3:20 PM
ZX81 KEYBOARD Subroutine—Commentary https://lobste.rs/s/uxkpk1 ##retrocomputing
Reposted by Sinclair Research
Age verification?
I used to plug a 16K RAMpack into a ZX81 to get my game on.
I used to plug a 16K RAMpack into a ZX81 to get my game on.
Age verification?
I had to restart Windows ME ten times a day!
I had to restart Windows ME ten times a day!
Age verification?
I had to manually configure my SoundBlaster.
I had to manually configure my SoundBlaster.
February 10, 2026 at 3:32 PM
Age verification?
I used to plug a 16K RAMpack into a ZX81 to get my game on.
I used to plug a 16K RAMpack into a ZX81 to get my game on.
That’s a lot of RAM!
February 9, 2026 at 11:29 PM
That’s a lot of RAM!
Reposted by Sinclair Research
Sinclair Spectrum +2A (Amstrad) (1987)
Untested, Dirty & smashed in the post, but that's my kind of challenge, especially on my current 8-bit kick at the moment
❌Case is broken
❌Tape belt stretched
🤷♂️No idea if it works
❌No PSU
❌No Video Cable
❌No Joystick
LET'S 🫧🪛 IT!🧵👇
Untested, Dirty & smashed in the post, but that's my kind of challenge, especially on my current 8-bit kick at the moment
❌Case is broken
❌Tape belt stretched
🤷♂️No idea if it works
❌No PSU
❌No Video Cable
❌No Joystick
LET'S 🫧🪛 IT!🧵👇
February 6, 2026 at 5:05 PM
Sinclair Spectrum +2A (Amstrad) (1987)
Untested, Dirty & smashed in the post, but that's my kind of challenge, especially on my current 8-bit kick at the moment
❌Case is broken
❌Tape belt stretched
🤷♂️No idea if it works
❌No PSU
❌No Video Cable
❌No Joystick
LET'S 🫧🪛 IT!🧵👇
Untested, Dirty & smashed in the post, but that's my kind of challenge, especially on my current 8-bit kick at the moment
❌Case is broken
❌Tape belt stretched
🤷♂️No idea if it works
❌No PSU
❌No Video Cable
❌No Joystick
LET'S 🫧🪛 IT!🧵👇
I do! My micro professor needs MOAR.
Fancy tricking out your 6502 or MC6400 trainer, Micro-Professor, or Heathkit? Michael Wessel's board is for you.
Michael Wessel's PicoRAM Ultimate Vintage SBC Expansion Doubles Its RAM Emulation to a Generous 4kB
Fancy tricking out your 6502 or MC6400 trainer, Micro-Professor, or Heathkit? Here's the board for you.
www.hackster.io
February 9, 2026 at 5:02 PM
I do! My micro professor needs MOAR.
Reposted by Sinclair Research
36. Skool Daze (Microsphere) - ZX Spectrum
Did anyone actually have an original copy of this game? It blew my mind when I found out that it wasn't just a school simulator and you actually had to DO stuff to win! Not that I could of course - those shields were just too hard to hit.
#SkoolDaze
Did anyone actually have an original copy of this game? It blew my mind when I found out that it wasn't just a school simulator and you actually had to DO stuff to win! Not that I could of course - those shields were just too hard to hit.
#SkoolDaze
February 9, 2026 at 2:33 PM
36. Skool Daze (Microsphere) - ZX Spectrum
Did anyone actually have an original copy of this game? It blew my mind when I found out that it wasn't just a school simulator and you actually had to DO stuff to win! Not that I could of course - those shields were just too hard to hit.
#SkoolDaze
Did anyone actually have an original copy of this game? It blew my mind when I found out that it wasn't just a school simulator and you actually had to DO stuff to win! Not that I could of course - those shields were just too hard to hit.
#SkoolDaze
Reposted by Sinclair Research
Still pretty cool.
February 9, 2026 at 2:03 AM
Still pretty cool.
Ladies, find yourself a man that looks at you like I look at a ZX80.
February 7, 2026 at 4:13 PM
Ladies, find yourself a man that looks at you like I look at a ZX80.
Reposted by Sinclair Research
Rocket Command - on the ZX Spectrum 48K !! with Commentary
- It’s Defender, but puts me in a kind of Red Dwarf mood 🤔 🕹️
#retrogaming #zxspectrum #gaming #games #njenkin
youtu.be/uTDEEUCqSg0?...
- It’s Defender, but puts me in a kind of Red Dwarf mood 🤔 🕹️
#retrogaming #zxspectrum #gaming #games #njenkin
youtu.be/uTDEEUCqSg0?...
Rocket Command - on the ZX Spectrum 48K !! with Commentary
YouTube video by Njenkin
youtu.be
February 7, 2026 at 10:05 AM
Rocket Command - on the ZX Spectrum 48K !! with Commentary
- It’s Defender, but puts me in a kind of Red Dwarf mood 🤔 🕹️
#retrogaming #zxspectrum #gaming #games #njenkin
youtu.be/uTDEEUCqSg0?...
- It’s Defender, but puts me in a kind of Red Dwarf mood 🤔 🕹️
#retrogaming #zxspectrum #gaming #games #njenkin
youtu.be/uTDEEUCqSg0?...
Reposted by Sinclair Research
Rocket Command
ZX Spectrum 48K
Published by Spectrum Games Ltd in 1983
Designed for 16K. Based on the arcade coin-op, DEFENDER, from Williams Electronics in 1981.
Missing the scanner, but does its stuff. Cost £5.50 though! 🤔🕹️
#retrogaming #zxspectrum #gaming #games #njenkin
ZX Spectrum 48K
Published by Spectrum Games Ltd in 1983
Designed for 16K. Based on the arcade coin-op, DEFENDER, from Williams Electronics in 1981.
Missing the scanner, but does its stuff. Cost £5.50 though! 🤔🕹️
#retrogaming #zxspectrum #gaming #games #njenkin
February 7, 2026 at 10:24 AM
Rocket Command
ZX Spectrum 48K
Published by Spectrum Games Ltd in 1983
Designed for 16K. Based on the arcade coin-op, DEFENDER, from Williams Electronics in 1981.
Missing the scanner, but does its stuff. Cost £5.50 though! 🤔🕹️
#retrogaming #zxspectrum #gaming #games #njenkin
ZX Spectrum 48K
Published by Spectrum Games Ltd in 1983
Designed for 16K. Based on the arcade coin-op, DEFENDER, from Williams Electronics in 1981.
Missing the scanner, but does its stuff. Cost £5.50 though! 🤔🕹️
#retrogaming #zxspectrum #gaming #games #njenkin
Reposted by Sinclair Research
Postie has just been and that's my Saturday morning bog reading sorted!
February 7, 2026 at 11:42 AM
Postie has just been and that's my Saturday morning bog reading sorted!
After playing 3D Monster Maze, what other game could possibly compare?
February 7, 2026 at 3:51 PM
After playing 3D Monster Maze, what other game could possibly compare?
In machine code I bet you could
February 7, 2026 at 3:50 PM
In machine code I bet you could
Reposted by Sinclair Research
Reposted by Sinclair Research
The question I had in mind was: Could you make a real time graphic spectrum thing on a zx81.
Ya know like the bars that move up and down on a cheap hifi.
So an 8bit adc chip that you can sample as often as you can. 3.5mhz z80. 32x24 column B&W display.
Ya know like the bars that move up and down on a cheap hifi.
So an 8bit adc chip that you can sample as often as you can. 3.5mhz z80. 32x24 column B&W display.
February 7, 2026 at 9:00 AM
The question I had in mind was: Could you make a real time graphic spectrum thing on a zx81.
Ya know like the bars that move up and down on a cheap hifi.
So an 8bit adc chip that you can sample as often as you can. 3.5mhz z80. 32x24 column B&W display.
Ya know like the bars that move up and down on a cheap hifi.
So an 8bit adc chip that you can sample as often as you can. 3.5mhz z80. 32x24 column B&W display.
Darn straight
February 6, 2026 at 9:40 PM
Darn straight
You mean it was completely silent?
February 6, 2026 at 9:40 PM
You mean it was completely silent?