Sinclair Research

@sinclairresearch.bsky.social

2514 Followers 2062 Following

Customer support for your ZX80, ZX81 and other classic hardware. We’re sorry to tell you that your warranty has expired.

ZX Spectrum screen showing: Manic Miner was coded in six weeks by a 17-year-old. Matthew Smith didn't need a game engine, a Discord se
ZX81 screen showing: The ZX81 had 1KB of RAM. Not 1MB. Not 1GB. One thousand and twenty-four bytes. And people wrote ch
ZX81 screen showing: Sinclair Research Troubleshooting Guide: Symptom: Screen displays garbage after 20 minutes. Cause: Overheating.
ZX Spectrum screen showing: Sinclair Research Troubleshooting Guide: Symptom: Screen displays garbage after 20 minutes. Cau
ZX Spectrum screen showing: Sinclair Research Troubleshooting Guide: Symptom: Screen displays garbage after 20 minutes. Cause: Overh
ZX81 screen showing: Has anyone else noticed that the ZX81 manual casually introduces arrays, FOR-NEXT loops, and conditional branching
ZX81 screen showing: Has anyone else noticed that the ZX81 manual casually introduces arrays, FOR-NEXT loops, and conditional br
ZX Spectrum screen showing: Sinclair Research Internal Memo, 1982: RE: Customer complaint about colour bleed
ZX81 screen showing: The ZX81 had no moving parts. No fan. No disk drive. No mechanical keyboard. It was, in engineering terms, a warm sla
ZX Spectrum screen showing: The Spectrum came with a coiled cable that connected it to the TV via an RF modulator. Over time, th
RAND USR 16514
ZX Spectrum screen showing: Who remembers discovering that PEEK and POKE could read and write directly to memory? One moment you w
ZX81 screen showing: The ZX81 had a FAST mode and a SLOW mode. FAST mode turned off the display to run programs quicker. SLOW
ZX Spectrum screen showing: Sinclair Research Inter-Office Memo, 1983: Re: The ZX Microdrive wafer cartridges. Engineering reports
ZX Spectrum screen showing: The Spectrum had 6,912 bytes of screen memory. Every byte was mapped to a fixed location on the dis
ZX81 screen showing: Fun fact: The ZX81 television output was so unstable that pressing a key could make the picture roll. You had to
ZX Spectrum screen showing: Who else learned what "syntax error" meant before they learned what "syntax" meant? The Spectrum taught
ZX Spectrum screen showing: The Spectrum +3 had a built-in 3-inch floppy drive. Not 3.5-inch, like everyone else. Three inches.
ZX Spectrum screen showing: The ZX Spectrum manual had a chapter on binary arithmetic. It explained AND, OR, and NOT to children who had
ZX Spectrum screen showing: There were people who typed in 3,000-line BASIC programs from magazines without understanding a single line of code. They did no
ZX Spectrum screen showing: Fun fact: The ZX81 Z80 processor ran at 3.25 MHz, but spent most of its time generating the
ZX Spectrum screen showing: Sinclair Research Product Clarification: The ZX Spectrum is not waterproof. We mention this
ZX Spectrum screen showing: In 1982, the fastest way to share a program with a friend was to hand them a cassette tape. If they lived
ZX Spectrum screen showing: The ZX81 motherboard had exactly four chips in the original design. Four. The Z80 CPU, a ROM
ZX Spectrum screen showing: Who else had a Spectrum program they were genuinely proud of but never showed anyone because explaining
ZX Spectrum screen showing: Sinclair Research Internal Memo, 1983: Re: Customer request for a backlit screen. The ZX Spec
ZX Spectrum screen showing: The ZX Spectrum cassette port operated at 1500 baud. That is roughly 187 bytes per second. A modern fibre
ZX Spectrum screen showing: Sinclair sold computers by mail order. You posted a cheque to Cambridge and waited six to eight weeks. Someti
You can get so many programs in this bad boy - car salesman meme with a ZX81
Scrolling TGIF
ZX Spectrum screen showing: The ZX81 character set included block graphics - 11 characters made of quarter-block combinations. Wi
ZX Spectrum screen showing: Who else copied games by connecting two tape recorders with a cable from Tandy? And who else then
ZX Spectrum screen showing: The ZX Spectrum ran at 3.5 MHz. Three and a half million cycles per second. Your phone runs at thr
ZX Spectrum screen showing: Sinclair Research Warranty Department: Your warranty claim has been received. Unfortu
ZX Spectrum screen showing: Crash magazine rated games out of 100. A score of 90 meant a classic. A score of 40 meant the reviewer had
ZX Spectrum screen showing: The Kempston joystick interface read from port 31. Every Spectrum game asked "Kempston, Sinclair, or Ke
An image of an ice cream cone loads
ZX Spectrum screen showing: Sinclair BASIC had no ELSE statement. Every IF-THEN was a leap of faith with no safety net. If the condition was
ZX Spectrum screen showing three lines of white text on blue background: Dragon 32 had better BASIC. Oric-1 had a real sound chip. Spectrum outsold them both.
In ZX81 font “ back in 1982 my social media was a monthly copy of your Computer magazine”