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+2a datacorder problemsHelloooo, how's it going? Reason I'm posting is that 1) I'm a massive speccy fan, it was the first range of computers I ever owned 2) I'm having rea…
... border. The cause is a faulty ULA chip
Also ... cause of this is a faulty ULA chip – these are usually ... shop. On some models the chips are not soldered onto the ... -
+2a datacorder problemsHelloooo, how's it going? Reason I'm posting is that 1) I'm a massive speccy fan, it was the first range of computers I ever owned 2) I'm having rea…
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Definitely leaning towards a faulty chip....(in that regard, thanks ... I start attempting to pull chips from the board (I cant ... -
Problem upgrading 16K SpectrumHello Spec-chums, I've been a long time Commodore user, but also a long-time Speccy admirer (and emulator user). I've recently got hold of a Issue 2…
... number of chips - it still says that chip is faulty and still ... -
Problem upgrading 16K SpectrumHello Spec-chums, I've been a long time Commodore user, but also a long-time Speccy admirer (and emulator user). I've recently got hold of a Issue 2…
... the chip in IC17 was faulty. I've replaced it, but ... just replacing all the RAM chips? -
Another badly behaved RAM upgradeI have a 48K issue 4A board (yellow it is) that was a 48K machine from new, but only reports 16K working with the Sinclair ZX Test ROM in an Int2. H…
... of how you rearrange the chips is most likely to be ... , since then all the chips would look faulty during a random fill ... -
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 …
... Z80 writes to all 8 chips simultaneously because they are 1 ... bit chips, not 8 bit chips. So you have ... user exactly which chip is faulty - look for which bit is ... correct, and that's your faulty chip. You'll need to ... -
Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…
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On board is original 48 ula + Z80 cpu + 32kB rom ... file + JEDec files for gal chips (gal 16v8 is used as ... -
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 …
... chips (4464) are easy to damage, and indeed, they could be faulty ... , but swopping the ROM chips isn't likely ... , the notches of all the chips face TOWARD the edge connector ... /> If you change your RAM chips, use sockets ;) They cost only ... -
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... it's lower RAM going faulty. This seems to be the ... the low-hanging fruit - swap chips that are socketed to test ... -
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... 's lower RAM going faulty.
.... swap chips that are socketed to ... -
Component count/modern replacementsThere is a thread/project for replacing the old memory with simms There is also the ULA replacement. There's DEATH's composite replacement. What els…
... have been produced than 4116 chips and with failure rate I ... the composite replacement in 16/48, people are already having problems ... -
Component count/modern replacementsThere is a thread/project for replacing the old memory with simms There is also the ULA replacement. There's DEATH's composite replacement. What els…
... had a number of standard chips replaced by an ULA. IMHO ... have been produced than 4116 chips and with failure rate I ... the composite replacement in 16/48, people are already having problems ... -
Spectrum+ - multiple issuesHi all Yesterday I picked up a Spectrum+ (via eBay) to add to my collection. Now, before any of the names I recognise from the last few months of l…
... tests to find out which chips are faulty depending on the failure ... likely pick up the failed chips easiest. Remember Spectrum RAM is ... byte actually comes from 8 chips. The bit position that's ... -
Spectrum+ - multiple issuesHi all Yesterday I picked up a Spectrum+ (via eBay) to add to my collection. Now, before any of the names I recognise from the last few months of l…
... .[/quote]
Sadly, the chips are soldered in - but you ... source a new set of chips, put them in (with new ... take a look at the faulty one with my Dad next ... mention it before but the faulty board is an Issue 2 ... -
upgrades what you looking for?i start working for upgrades for ZX, but i'm Atari specialist and i don't know exactly what you need for ZX. On the moment i have DIVIDE in stock, an…
... ram adapter card to replace faulty ram ic's with some ... of (16K x 1) DRAM chips. To reach that goal, more ... -
divide plus back to life , preorderI have green light form authors to made DIVIDE PLUS, anybody interested? Promise from me , fully asembled and tested DIVIDE PLUS in plastic case. Qua…
... looking for cheap zx +3 (faulty no problem, no floppy no ... units. I have few zx 48, ZX plus, zx plus 2black ... -
Free to good homeHi all Just been given a faulty +2A, I need the AY but the Z80 and a copuple of other chips are socketed, so if anyone needs them or whats left of t…
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Just been given a faulty +2A, I need the AY ... and a copuple of other chips are socketed, so if anyone ... -
Spectrum Serial Numbers Wanted!![b]This post updated Sept. 26, 2013[/b] As far as I know, the serial numbering system for the Spectrum has never been fully worked out. For the p…
... 8213 Modulator 8226, NEC memory chips with no datecode 240808 ?177 ... 48 1 5C102E 8223 Z80A 8213 Mod 8226,NEC memory chips ... 151008 ?21
001-019392 48 160908 ?13.50
001 ... ?41
001-032532 48
001-032740 Green 290808 ... -
dead issue 6a boardI've just been back to the uk and found my old 48K + there - and bought it back with me to singapore - it's giving white border and red bars. From wh…
... step is checking for bad chips. If you have some hardware ... missing bit and hece, the faulty chip:
[img]http://www ... the first division.
A faulty DRAM chip has often its ... -
+3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…
... functions that lied on separate chips were integrated into the ULA ... , an Amstrad CPC464 with a faulty 4164. -
+3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…
What happens if you swap memory chips around? There might be only one faulty chip. Faster memory is not a problem. -
+3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…
[QUOTE=Fraser;383451]What happens if you swap memory chips around? There might be only one faulty chip. Faster memory is not a problem.[/QUOTE]
The chips are still soldered, I m going to buy the sockets these days and will desolder them. -
Remembering games master.Sure it was hosted my the massiveley anoying domonic diamond and made patrick moore look like a total arse,but we all loved it. So here we are with a…
... site moderators]
Bounty: 48.94 GB
Only ... /> h**p://tv-vault.org/kb.php?id=35
[QUOTE ... -
Yet another Wii threadI think I'm getting a Wii on Saturday, er that's about it really I think! Don't really need to ask too many questions or about online play or Mii's …
... TV with your fish n' chips.
Whilst I eat ... Mignon in front of my 48' Plasma Screen Tv in my ... -
Yet another Wii threadI think I'm getting a Wii on Saturday, er that's about it really I think! Don't really need to ask too many questions or about online play or Mii's …
... TV with your fish n' chips.
Whilst I eat ... Mignon in front of my 48' Plasma Screen Tv in my ... -
Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …
... of the first three RAM chips (presumably they go up in ... up pattern mean that more chips could be faulty? -
Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …
[QUOTE=guesser;398177]no, each chip is one bit wide, the 8 chips make up one byte[/QUOTE]
Notice I said Kb, not KB - there is a difference.
Are you sure? Where would the other 15KB of an unexpanded spectrum go then? -
Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …
... working OK (and perhaps a faulty chip is just loading it ... on all the 4116 RAM chips. If -5v is missing, ... the chips will be toast; it's ... correct.
The chips are one bit wide (for ... every 4116 - all 8 chips get selected for a single ... -
faulty zxspectrum +hi all i just bought a speccy 48k+ off ebay it worked for like 15 mins now it is stuck on the reset screen. I fear this is something major maybe fau…
... this is something major maybe faulty ram or the ULA. Does ... inside, maybe one of the chips is moved from it's ...
