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Yes, there are different editions of the Sinclair BASIC programming manual. But apart from corrections to mistakes, I don’t think there are any significant changes like programs being dropped. This is a HTML copy of the second edition manual http://www.worldofspectrum.org/ZX81BasicProgramming/ I hav...
Last night there were plenty of fireworks being launched in and around my home town. In my part of the world, we have more than just fireworks. We have large winter illuminated carnivals. These are known as the Somerset County Guy Fawkes Carnivals https://www.somersetcountycarnivals.com http://www.s...
Hi Andy That’s an impressive set of computers :D I also have rather a lot (although I don’t know how many, as I gave up counting them a while ago :oops:). Mine include: Acorn Atom Acorn BBC Model B Acorn BBC Model B+ Acorn BBC Master 128 Acorn BBC Master Compact Acorn Electron Acorn A3010 (needs att...
- Mon Nov 04, 2019 10:01 am
- Forum: Hardware
- Topic: Trap a sound signal on the Zx81 BUS.
- Replies: 6
- Views: 282
Hi XavSnap I’m not sure what you are asking? For loading from cassette tape, the ULA acts as a simple level shifter and input port. When the Z80 CPU reads from I/O port 0xFE, bit 7 is set or reset (high or low) depending on the voltage level on the ULA input pin (tape in, connected to the Ear jack s...
I would like:
I would like:
- 96K RAMpack + AY DIY kit inclining nearly all parts except 628126 IC and the edge connector - 1 set for 12.50GBP
- Video output buffer PCB - 1 unit for 3.00GBP