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Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... uncontended video RAM and a Z80 CPU, so could have he. It ... -
Z80 new old stockHi. I found this on eBay but ... is there a way we could know they don't hav a faulty M1 line? [url]http://www.ebay.com/itm/Zilog-Z80-CPU-Z0840004PS…
... the card. Putting the original CPU back onto its place got ... also stock a range of Z80 CPU's (again from 4MHz to ... -
Spritual successor to the Speccy1988-1995 - Atari ST/STe/Falcon 1995-2000 - ? hmmm ? 2000-2006 - Playstation 2 with a keyboard 2007- ?
... the US, it uses a z80 cpu, it is more colourful than ... -
I want to upgrade 16k to 48k - need help.I recently purchased a lovely little 16k machine (Issue 2) but I'd like to upgrade it to 48k. I'd rather not use a Ram pack as I think they are ugly…
... ic's then turning the power on, no soldering?[/QUOTE]
on the type of chips ... a different way depending on DRAM chips were manufactured ... TI. This was changed on later revisions, where ... jumpers at designated places on board.
With ... -
SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... www.z80.info/zip/z80-documented.pdf"]The Undocumented Z80 Documented ... esoteric register of the ZiLOG Z80 CPU[/URL]
[URL=" ... /> [URL="http://www.z80.info/z80arki.htm"]Z80 CPU architecture[/URL]
... how accurate Z80 emulation is. If a Z80 emulator passes ... -
Video generation using a CPUWe know it is possible to generate a video signal using a CPU, and this technique was often used on low-end computers in the early 1980's (for exampl…
... using a CPU, and this technique was often used on low-end ... is only a special-purpose CPU built with this task in ... GPU works like the CPU generated display on a ZX81, though - the ... to the Spectrum - a (G)CPU rendering to a frame buffer ... -
ZX Spectrum 48K help and Hello :)Hello out there I am a long time admirer of the ZX Spectrum range of computers my first go at one was in the early 1980s with my dads ZX 80 now its …
... info I will check the power on the pcb as for the ... the time when its powered on. I am currently trying to ... -
Which first (if either)?As can be seen by my recent posts, I'm kind of enthusiastic about my new +3 :) I'll set up a sig in due course, but at present here's what I've got …
... read the comments about +5V on the adaptor; see
[URL ... running a wire to supply power on the +5V to the card ... -
Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... />
You have a faulty Z80 cpu (M1 line), replace it and ... -
CF card to IDE adaptor - modificationI bought a few bits and pieces recently to get my +3 reading from a CF card, but the cheapest CF card I bought (Sandisk 4GB) needs power that current…
... only reason not to provide power on pin 20 of an IDE ... 't put a pin 20 on my interfaces reasoning that if ... 5v (at least it is on the simple 8-bit interface ...
