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UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.
The 4464 works "as is" in the black +2a/b/+3. :)
Oh, and you can use a 4164 chip in place of thse TMS (etc) and ignore the strapping links. -
+2B ram chips?Hi all, I have got 2 Plus2B`s and 1 Plus2 gray case. Ok the one Plus2B don`t work, so I tried to see if I could pin down the problem. I changed the …
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The grey +2 uses 4164 RAM should you ever need ... -
Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…
Just had a look at the old style C64 diagram the RAM chips in those are 4164. -
Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…
[QUOTE=swift240;202206]Just had a look at the old style C64 diagram the RAM chips in those are 4164.[/QUOTE]
You can use those in the UPPER memory block. -
Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…
... 3N. If you already have 4164's you may be interested ... just done is disconnected the 4164's unused pin (top left ... -
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…
... use 4464 chips instead of 4164 for the upper RAM block ... little more available than the 4164. Winston? Piters??
TIA ... -bit data buses of the 4164/4532s and the 4116s, so ... -
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…
4164 is not obsolete quite yet. But not all suppliers offers them. Shop around a little, and I'm pretty sure you'll find them. I can get them here in Norway without hazzle, so it should be even easier to find them in UK. -
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…
... -bit data buses of the 4164/4532s and the 4116s, so ... the other half of the 4164 chip, thus having an 80K ... -
Wtf??I won this NZ auction earlier this week [url]http://www.trademe.co.nz/Browse/Listing.aspx?id=116509561[/url] and have been to collect the hardware th…
... - compare that to the 4116/4164/ROM/Z80CPU chips I've ... -
Wtf??I won this NZ auction earlier this week [url]http://www.trademe.co.nz/Browse/Listing.aspx?id=116509561[/url] and have been to collect the hardware th…
... - compare that to the 4116/4164/ROM/Z80CPU chips I've ... -
Broken SpectrumsChaps ( & Mrs Death ), I was looking at getting some dynamic ram chips for the next phase of the Harlequin stuff, and I started thinking...... I've…
... . It's possible to use 4164 in place of the 4116 ... -
Broken SpectrumsChaps ( & Mrs Death ), I was looking at getting some dynamic ram chips for the next phase of the Harlequin stuff, and I started thinking...... I've…
... . It's possible to use 4164 in place of the 4116 ... -
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…
... means a memory speed of 150ns, the rest after that usually ... -
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…
... all went wrong.
24 4164 chips and 8 4116 (for ... -
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 ... -
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…
... when replacing OKI chips with 4164?
In D4164C -3 ... -
DRAM (:baffled:)Hi, Can someone explain to me the definitive rules on DRAM access times in terms of suitability for a particular speed of processor? Specifically, …
... remember a toast 128K with 4164-20 that it didn't ... start if you put 4164-12 ( I changed all the ... -
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 …
... /> 3720-20 and 4164 chips. if you put 4164 chip, you don ... / etc 32Kx1 ram chips were 4164 chips with a broken 32K ... ( 4532 H).
Like 4164 is 64kx1 chips, it'll ... -
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 …
... stupid test. Remove all the 4164 ram and switch on the ... -
Anyone after 4164s...If anyone's after 4164 RAM... ... I'm in Houston at the moment, and EPO has some 4164 RAM in the shop, 100, 150 and 200ns variety, for $1 each. If …
... ;246135]If anyone's after 4164 RAM...
... I'm in ... moment, and EPO has some 4164 RAM in the shop, 100 ... -
Upgrading to 48kI picked up a 16k Issue 2 Spectrum over the weekend, and I'd like to upgrade it to 48k. I've scanned an old [URL="http://www.drumfu.com/SinclairZXSp…
The 4164 / 4564 memory seems to be quite difficult to get hold of... any suggestions of alternatives?
cheers -
Upgrading to 48kI picked up a 16k Issue 2 Spectrum over the weekend, and I'd like to upgrade it to 48k. I've scanned an old [URL="http://www.drumfu.com/SinclairZXSp…
[quote=jp;285017]The 4164 / 4564 memory seems to be ... -
A 64K Spectrum?? Is this real?I have seen avertised on Ebay today two boxed ZX Spetrum Rubber Keys. One 16K and the other a 64K upgraded model?? Is this for real??? [url]http://…
Well, I repaired a Issue 2 Speccy putting 4164 chips on the upper memory, so I have a 80K RAM Speccy ;-) -
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... the upper 32K for the 4164 (or whatever your particular machine ... -
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…
you can use 41256 chips in place of the 4164. Wasteful, but if needs must..... -
New Guy Wants Speccy - SWAP !Hi, I`m new here so here is a little background info ! I always had a C64 when I was in my teens in the 80`s, my friends had Spectrums, so it was alw…
...
4116 RAM chips, 4164 upper RAM chips, any of ... -
Help with faulty +2ahi everyone I'm Nuno from Portugal I think I made poopoo with a 128k +2a motherboard I had spare for testing purposes This motherboard has always …
... parts :) .
They still have 4164 dram?s for the 48k ...
