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Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... was my issue 4A Spectrum (NEC) - the first one I reported ... -
Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…
... ) CPU are 4 Mhz ! and NEC D780C-2 are 6 Mhz ... .cpu-world.com/CPUs/Z80/NEC-D780C-2.html"]http://www ... .cpu-world.com/CPUs/Z80/NEC-D780C-2.html[/URL]
Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…
... ) CPU are 4 Mhz ! and NEC D780C-2 are 6 Mhz ... .cpu-world.com/CPUs/Z80/NEC-D780C-2.html"]http://www ... .cpu-world.com/CPUs/Z80/NEC-D780C-2.html[/URL]
Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…
... like the guy selling the NEC ones on ebay is still ...Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…
... like the guy selling the NEC ones on ebay is still ...Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…
[QUOTE=+2MAN;218518]I assume these can be used in all 48k speccys then? or only some issues?[/QUOTE]
I've see lots of Spectrums with NEC D780C-1 CPUs.
NEC D780C-1 = Z80A
NEC D780C-2 = Z80Bflu epidemic on its wayso beware of sneezy people.
... cos I off to the NEC to see Rush...flu epidemic on its wayso beware of sneezy people.
flu epidemic on its wayso beware of sneezy people.
flu epidemic on its wayso beware of sneezy people.
Oxford Speccy meetup, October 20th[b]Update:[/b] Date and venue decided - The Gloucester Arms, from 2pm, 20 October 2007. Full details: [url]http://matt.west.co.tt/spectrum/oxford-spe…
Anybody who sees this might do well to avoid the M42 round the NEC area. Just been down there and the westbound carrage way is very slow / stopped.
True at 11.15 Saturday morning.Look what I got!Look what I just got in the post: [url]http://www.alioth.net/tmp/W5100.jpg[/url] But, please... don't hold your breath :-) Coming to an edge connec…
... got my first batch of NEC Z80 CPUs through the post ...About letters "Z" and "X" in "ZX Spectrum"Who knows what does it mean? Is it an abbreviation or anything else?
... it's based on a NEC copy of the Z80 processor ...ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... manual which states that for NEC memories there is no need ...ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... manual which states that for NEC memories there is no need ... />
I was guessing that NEC was an issue... I'm ...divIDE woesHi y'all ! Last night I built my lovely divIDE ;-) I downloaded flasher and +divide.tap from [url]http://www.biehold.nl/rudy/+divide/index.htm[/url…
Incidentally, who made the Z80 in the faulty machine? Both the machines with bad M1 lines that I've encountered had Zilog rather than NEC parts.divIDE woesHi y'all ! Last night I built my lovely divIDE ;-) I downloaded flasher and +divide.tap from [url]http://www.biehold.nl/rudy/+divide/index.htm[/url…
... encountered had Zilog rather than NEC parts.[/quote]
Winston ...Problem with replacing all upper memory with 4164 chipsGuys, i have a problem with the high memory of a 4B issue. At first the board had OKI chips for high memory and one of them was faulty. Since its ea…
... /> No, Your solution was perfect. NEC 4164C-3 are 200ns chip ...Problem with replacing all upper memory with 4164 chipsGuys, i have a problem with the high memory of a 4B issue. At first the board had OKI chips for high memory and one of them was faulty. Since its ea…
... /> No, Your solution was perfect. NEC 4164C-3 are 200ns chip ...I have just seen Steve Jobs ( Apple ) 2008 keynote speechThe products his company comes up with are fantastic and each year they seem to make the products better with more features and easier to use. Thy do…
... away the competition, much like NEC did with it's PC ...sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …
... the system has, Hitachi or NEC (or possibly National Semiconductor... one ...DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... only with this particular z80 (NEC D708C-1) out of the ... one that was soldered, a NEC D708C-2 and a Zilog.DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... one case I had a NEC CPU which won't work ...DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... + only works with a specific NEC, too bad i don't ...DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... for the
problems. Especially NEC CPUs were responsible for this ... ?
In my case a NEC D780C-1 solved the problem ... , NEC D780C-2 (is this a ...DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... produced in the past, now NEC makes the D780C-2 i ... get along with perfectly good NEC Z80s (MB02+). Go figure....
DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... normal Zilog one to a NEC one that I got from ... screens, etc. The change to NEC made it all go away ...DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... working ok now with the NEC z80 (and as long as ... was somehow overcame by the NEC cpu. Not that the tight ...DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... working ok now with the NEC z80 (and as long as ... was somehow overcame by the NEC cpu. Not that the tight ...
