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HELP 4532 or 4864 RAM wanted !Hello My real spectrum fell off yesterday I know that one RAM memory chip is out of order There was 8 X HM4864P-2 but I saw in the Spectrum schemati…
... in the Spectrum schematics that 4532 could be OK (and that ... -
ahem!.. could I have a minute of everyones time please :)ok... here's the thing. I'm looking into sourcing some spare IC's for the whole range of Spectrums - mainly memory, as that's probably the weakest l…
... the ULA as well), 4116, 4532, 41464 etc etc, but also ... -
Spectrum repairsHello, does anybody here have experience with repairing defunct Spectrums? I have several of them at home, mostly 48K ones collected over time from …
On a 48K issue 6A......how can i isolate the 32K block? I want to test if there is any fault on the 4116's , leaving the 4532's out of the equation. Will removing the …
...how can i isolate the 32K block?
I want to test if there is any fault on the 4116's , leaving the 4532's out of the equation.
Will removing the logic (in this case one pcf1306p) do the job?
Thanks in advance.Three feet later...Three feet of solder wick later, that is, after clearing the holes where the 4532 (upper 32K) memory was on the issue 4B board I've finally got aroun…
... clearing the holes where the 4532 (upper 32K) memory was on ...Wanted: 4532 RAM chipAnyone got any of these that have not been soldered onto a board? I'm after one TMS4532-20NL3 to keep my Spectrum 48K authentic...
Anyone got any of these that have not been soldered onto a board? I'm after one TMS4532-20NL3 to keep my Spectrum 48K authentic...Lot's of ZX Spectrum parts: RAM chips, ULA's, etcI have new stock of 100% tested parts. I even got my hands on a bunch of ULA's!! [IMG]http://benophetinternet.nl/hobby/sales/parts/IMG_6068.JPG[/IMG…
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- Ram chips: 4164, 4532, 4116, etc
- Logic chips ...March offers: lot's of parts!!!I have PLENTY parts available like a lot of 4164 ram chips. I even got some rare spare parts like ZX Spectrum issue two ULA's. - Logic chips: 74LSXX…
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- Ram chips: 4164, 4532, 4116, etc
[B]1 ...ZX Spectrum upper RAM module (4532/4164 replacement)Following the [URL="http://zx.zigg.net/LRR/"]lower RAM replacement module[/URL], there have been quite a lot of requests for something similar for th…
Following the [URL="http://zx.zigg.net/LRR/"]lower RAM replacement module[/URL], there have been quite a lot of requests for something similar for the upper 32K RAM in a Spectrum.
I am pleased to be able to offer such a thing for sale. I haven ...Understanding DRAMI think I am going slightly mad. My hardware knowledge has got more rusty than it should have done, and I am going to have to turn to the experts to…
... /> Now I know that the 4532 is a failed 64k chip ...I've had better nights...So I got a broken issue 2 today, case in good nick but the diags board showing multiple failures in both lower/upper RAM. Never mind, good as a spare…
... 4116's and 1 good 4532 :x plus the 5C112E-2 ...Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…
... machine, I then removed all 4532 and associated decoding chips (nice ...Upper Memory LinksI've got an 1982 Issue Two Spectrum 48k with an upper RAM fault. I've narrowed down the faulty IC and I'm in the process of removing the 8 IC's, sock…
... board before replacing with some 4532 chips I've salvaged from ...ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
... - checked, ROM - checked, PCF1306P - checked, 4532 - checked, LM1889 - checked, SN74LS04N - checked ...Upper memory issueZX Spectrum 48K, issue 2, boots fine. Lower RAM OK. When tested with the new test ROM in the Diagboard, for all upper RAM tests "FAIL" is shown. I…
... voltages could be related, the 4532 uses the 5V rail only ... P8401, where the non-socketed 4532's have P8231. I'd ...OopsToday is a sad day :confused: Poor old rubber keys has gone t**s up. :( All i get is a black screen with a white border. Any body got any ideas …
new release of winTZXHi all I released winTZX 0.4drc1 (04/02/2005) + Added CSW file support + Added block selection (replay and save) + Added reverse output + Added direc…
... , the 8 chip RAM are 4532 this mean (32K * 1 bit ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... /-4) enabled version of the 4532. You're much better off ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... /-4) enabled version of the 4532. You're much better off ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... ).
[/quote]
The 4532 chips are actually 4164s with ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... ).
[/quote]
The 4532 chips are actually 4164s with ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... ).
[/quote]
The 4532 chips are actually 4164s with ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... just for the half-dead 4532 chips - if you're using ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... just for the half-dead 4532 chips - if you're using ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... high/low halves of the 4532 were selected using different jumpers ... remember one set for the 4532 selection, and another for the ...Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... can only be mixed with 4532 type chips (Suffix 4 which ...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 …
... for anything more than a 4532 as that jumper just selects ...RAM chips are 4164s and 4564s interchangeableI paid for some 4164s online, for upgrading my Spectrum 16K to 48K, and I've been given 4564s. I've tried these along with the correct logic ICs and …
The schematics usually show 4532 chips, but AFAICT they would ...Spectrum RAM Paks...This jogged my memory (excuse the pun!!) : [url]http://cgi.ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX-SPECTRUM_W0QQitemZ150057889352QQihZ005QQ…
... place of the half-working 4532 chips, you can select what ...
