ZX Spectrum T-shirts!
ZX81 T-shirts!
Ready prompt T-shirts!
Spiral program T-shirts!
Arcade cherry T-shirts!
Atari joystick T-shirts!
Battle Zone T-shirts!
Vectrex ship T-shirts!
Elite spaceship t-shirt T-shirts!
Competition Pro Joystick T-shirts!
Atari ST bombs T-shirts!
Moon Lander T-shirts!
C64 maze generator T-shirts!
Pak Pak Monster T-shirts!
BASIC code T-shirts!
Pixel adventure T-shirts!
Vector ship T-shirts!
Breakout T-shirts!
|
|
The Sinclair ZX Spectrum was one of the most popular European computers of the 80's. Two models were launched: one with 16 kb RAM and one with 48 kb RAM.
One of its most "interesting" characteristics is its keyboard! Some keys have more than five (!) functions! It is impossible to type BASIC keywords letter by letter, instead you have to use function keys. A lot of peripherals and programs were developed for this computer. It seems that several models of this computers were launched (at least 3), but I've no technical details about them. It was replaced in 1984 by the Spectrum + and in 1985 by the Spectrum 128.
Alan Wilson reports to us :
The 16K version of the computer had only the 16K ram chips loaded, while the 48K version had both banks full.
To keep the prices down Sinclair used faulty 64K chips (internally 2 X 32K). All the chips in the 32K bank of RAM had to have the same half of the 64K chips working. A link was fitted on the pcb in order to choose the first half or the second half.
It was possible with a few logic chips for the experimenter to have access to the faulty 32K bank.
|
 |
Please consider donating your old computer / videogame system to Old-Computers.com or one of our partners. |
 |
Mon expérience sur ZX Spectrum
https://riri-linventeur.wixsite.com/les-debrouillards/zx-spectrum
| | Friday 27th November 2020 | Riri (France) | | |
| |
Hi! I''ve stumbled across a couple of real beauties online, an Issue One 16K Spectrum which looks like its in a condition I''ve never seen as good as before. The same seller seems to have unearthed a couple of real gems in terms of collectability value, including original Sinclair literature which I''ve not come across before. Take a look , see wht you think :
https://www.ebay.co.uk/itm/223084601634?ssPageName$STRK:MESELX:IT$_trksid$p3984.m1558.l2649
https://www.ebay.co.uk/itm/223079077190
| | Wednesday 1st August 2018 | mrfluffybrown (UK) | | |
| |
Hello - my first ZX Spectrum was a self-made which means, all of the functions of the ULA were substituted with logic chips from the 74-series. The first version didn''t have a coloured version, just black/white. Later, a piggy-back board was made. After reunification of Germany, I bought a used ZX Spectrum and added the following modules
- Betadisc Interface, 2 Floppy Disk Drives attached
- Printer Interface
- Kempston Joystick Interface
To attach all these modules at once, I also had to make a bus extender with industrial connectors.
The power was supplied by an PC power module, so I had enough 5V / 12V / -12V . It was a quite funny system and I was surprised how you can easily program with that machine even all key have multiple meanings depends on situation and keys pressed.
| | Monday 11th December 2017 | Ronald (Dresden) | | |
| |
|
|
(France, 1983) - 48k: 365 
