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+2 Gray ProblemI'm trying to repair a +2 gray that behaves differently at every boot up. Some rare times I can get the selection window but pretty soon the characte…
Thank you so much balford for your trouble. I already ordered new old stock 4164 150ns chips and will replace it as soon as i get them :) -
Lower & upper ram IC's for an issue 3 please.Would any of you great folks have 1 spare lower ram, and 1 spare upper ram IC's you would be willing to sell. I'm fixing up a poorly Spectrum that is…
I'm sorted for the lower ram just need the upper ram IC.
Is there any drop-in replacements for the TMS 4532-15NL4? Would a Samsung 4164-150NS work? -
Lower & upper ram IC's for an issue 3 please.Would any of you great folks have 1 spare lower ram, and 1 spare upper ram IC's you would be willing to sell. I'm fixing up a poorly Spectrum that is…
... Retroleum had stock of Samsung 4164-150NS for drop-in replacement upper ... -
4116 and 4164 chipsI've just found the following supplier for 4116 and 4164 RAM chips. about $0.80 each.. not bad. [url]http://www.jameco.com/[/url] It's a US site. I…
... following supplier for 4116 and 4164 RAM chips.
about $0 ... -
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…
... loading. I tried other new 4164 chips (in case one of ... when replacing OKI chips with 4164?
In D4164C -3 ... -
4164 and 4864 ChipsI have a stock of 4164, 4864 memory chips and 7805 voltage regulators if anyone needs them. Cost would be ?1.50 each plus postage for anyone on here…
I have a stock of 4164, 4864 memory chips and 7805 voltage regulators if anyone needs them. Cost would be ?1.50 each plus postage for anyone on here!
They are mainly 20ns
Rich -
4164 memoryHi all, I'm looking for 4164 memory, probably 4 chips. If you have some you willing to part with for some cash, let me know how much you want for it…
Hi all,
I'm looking for 4164 memory, probably 4 chips. If you have some you willing to part with for some cash, let me know how much you want for it + postage.
Cheers. -
Anyone have any tms4532-15NL3 chipsHello all, I am looking for some tms4532-15nl3 chips, I don't mind used as long as you think/know they are working. I can swap some 4116 chips like …
Testing 4116 and 4164 chipsI have a stash of old 4116 and 4164 chips and wondered how best to test them to see if they work. I don't have a working spectrum to plug them into …
... stash of old 4116 and 4164 chips and wondered how best ...4164 refreshHi, I remember pondering the mystery of how 4164's seem to get properly refreshed when used as video memory, and half the answer has just popped up i…
... pondering the mystery of how 4164's seem to get properly ... there are two kinds of 4164's, one needing a 128 ... refresh.
It seems most 4164's were 128 cycle, same ... successfully refresh most varieties of 4164, Certainly the OKI, Hitachi, Motorola ...4116 and 4164 chip avaliableHi all, while clearing out lots of old odds and sods I have come across a fair number of old dram memory chips. I have 200+ 4164 from various manufa…
... chips.
I have 200+ 4164 from various manufactures
20 ...4116 replaced by 4164 - "Noisy" paper?After I replaced my 4116's with 4164's and hooked them up to +5V, disconnected -5V and +12V, I have what looks like vertical lines in the paper, like…
... replaced my 4116's with 4164's and hooked them up ... and +12V and replace the 4164's with 4116's, the ...New batches of 4164 chips arrivedI have received a lot of 4164 chips today, and will probably find more. So if you need some, come and get them. Prices are found on my website: [url…
... have received a lot of 4164 chips today, and will probably ... ]http://benophetinternet.nl/hobby/vanmezelf/4164.jpg[/IMG]Febuary offer - 4164 ram chips: 10pcs ?9, 20pcs ?16Special febuary offer: [B]10x 4164 chips[/B]: normally 12 GBP, now for [B]only 9 GBP (11 EUR)[/B] + postage. [B]20x 4164 chips[/B]: normally 24 GBP…
... offer:
[B]10x 4164 chips[/B]: normally 12 GBP ... )[/B] + postage.
[B]20x 4164 chips[/B]: normally 24 GBP ... ]http://benophetinternet.nl/hobby/vanmezelf/4164.jpg[/IMG]Difference between brands of 4164 chips?I have gotten my hands on a batch of several brands of 4164 chips. Examples are NEC D4164C-3 and Mitsubishi M5K4164ANP-15. Anyone knows if any type …
I have gotten my hands on a batch of several brands of 4164 chips.
Examples are NEC D4164C-3 and Mitsubishi M5K4164ANP-15.
Anyone knows if any type is preferred above the other?Repalce 4164 RAM by 41464Dear all, I have some amount of 41464 DRAM from old PC VGA card which are useless at the moment. I think to keep them as a spare for the upper 32k R…
... upper 32k Ram made of 4164.
My question: Did ...4116 4164 DRAM testersSaw this and thought it may be of interest. https://www.ebay.co.uk/itm/DRAM-TESTER-for-4116-ZX-Spectrum-48k-other-retro-computers/154054505831?_tr…
... .uk/itm/DRAM-TESTER-for-4164-ZX-Spectrum-C64/154057204149?_trkparms ...Wanted 10 - 4116 Ram ChipsHi Can any one help I am trying to get hold of 10 4116 RAM chips for a 48K Spectrum. Does any one know who might stock them. I can get a minimum of …
... /> "4116 - Dynamic RAM NMOS 16kx1 150nS 16-pin"
or ... />
They also have "4164" (Dynamic RAM NMOS 64kx1) in ...Wanted 10 - 4116 Ram ChipsHi Can any one help I am trying to get hold of 10 4116 RAM chips for a 48K Spectrum. Does any one know who might stock them. I can get a minimum of …
... /> "4116 - Dynamic RAM NMOS 16kx1 150nS 16-pin"
or ... />
They also have "4164" (Dynamic RAM NMOS 64kx1) in ...Snow on screen of 48K Speccyok you wizards I fixed up my 4116 ram issue as Winston and McLeod advised me before by replacing with 4164's.... all I could find here in Singapore (…
... only had 10 of the 4164's left so i took ... pins, some are 250ns, some 150ns, but the speccy is running ...Looking for some 48k RAM (upper 32k bank)Greetings, I was wondering where I could find some upper RAM for a 48k (issue 4A). It's the Texas Instruments TMS4532-20NL4 P8419 (or any compatib…
... where I could buy the 4164 DRAM chips?[/quote]
eBay ... are multiple speeds for the 4164 chips (100ns, 200ns, 300ns..) Wondering ... .[/quote]
Go for 100/150ns if possible. If not, 200ns ... ]
Those RAM are actually 4164 RAM's with a defective ...Spectrum hangs upWhat might be problem when my ZX Spectrum 48K (rubber keys) hangs up after few minutes play? It had memory problems but i changed (or an expert did i…
And about those upper memory chips: only text in chips are M5K4164ANP 54821X -15
For me it tells only that chips model is 4164 and they are 150ns(?)
Ippezx spectrum +2 troubleshootingHi There I am new here and I need some advise as to where to look for issues on my zx spectrum +2 it was working fine this morning .. then while pl…
Any 4164 memory, with 150ns or less, will do the job. You can also use 41256 chips, as they are pin-compatible. For the later, connect pin 1 to pin 16 (GND).Issue 3B only sees 16k (and RAMTOP NO GOOD on loading)A ZX+ with issue 3B board that i got recently, does not see anything more than 32768 (sometimes 37267..) on "PRINT PEEK 23732 + PEEK 23733 * 256 (Ent…
... etc.?[/quote]
Use 150ns or faster chips. Don't ... recommend to you to buy 150ns chips or faster. For ... low memory bank chips. 4164 chips don't have this ... part. They were damaged 4164 chips that had the failure ... chips were cheaper than the 4164, much in the line ...+2 Gray ProblemI'm trying to repair a +2 gray that behaves differently at every boot up. Some rare times I can get the selection window but pretty soon the characte…
... you just need some 4164 RAM that's 150ns rated or better ...Note to SpiranthoIan Whilst playing about with Frankenspec, I have discovered that the 41256 memory IC works as well as a 4164 (etc) in the upper RAM block of a 48K …
... works as well as a 4164 (etc) in the upper RAM ...Component Equivalents/substitutionsA while ago, I mentioned to somebody in a thread that we should have a list of component equivalents and substitutions so that it's easier to fix our…
... chips work in place of 4164 upper RAM chips
V53C256P80L ...problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…
... memory with standart 4116 and 4164 memory chips.
but i ... on my working sinclair with 4164)
can someone tell me ...Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…
Does anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more available than the 4164. Winston? Piters??
TIA
