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ZX Spectrum+ showing 16K of RAMHello again, as the title says my ZX Spectrum+ is showing only 16K of RAM instead of 48K when running a memory check. [url="http://www.1000bit.it/su…
... + is showing only 16K of RAM instead of 48K when running ... how to identify the faulty RAM chip, but I seriously have ... -
Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... the 4114 RAM chip at IC8 was getting extremely hot. Almost enough ... anyone thinks that this shorted RAM could possibly be dragging the ... -
How can I fix a problematic Retroleum Smart Card. I did not do anything "WRONG " with it but I did but it on a flexible cable and this seems to have "upset" it .Since then It does not perform the …
... does not perform the main ram rest and just displays back ... also seems to get very hot . Is it "knackered" or can ... -
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…
... 1 spare lower ram, and 1 spare upper ram IC's you ... -
Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…
... seemed to indicate a lower RAM issue. It hadn't been ... -
Third-party ZX81 RAM packsOne of the things that's previously held me back from fishing for a ZX81 on eBay - other than "will the ULA on this machine sold as 'untested' be com…
... getting hold of a 16K RAM pack. Now, even back in ... of the existence of other RAM packs that weren't the ... (at least try to) eliminate RAM pack wobble, but then there ... time it had a working RAM pack I was [i]five ... -
MGT Sam Coupe BIG JOBLOT!!! 22 Disks, 3 manuals, 1MB Ram Expansion + Midi Cable!Direclty from my personal Sinclair collection that never end... ...MGT Sam Coupe BIG JOBLOT!!! 22 Disks, 3 manuals, 1MB Ram Expansion + Midi Cable…
Direclty from my personal Sinclair collection that never end...
...MGT Sam Coupe BIG JOBLOT!!! 22 Disks, 3 manuals, 1MB Ram Expansion + Midi Cable!
https://www.ebay.co.uk/itm/173022113295
Have a nice bid ;) -
Testing ram memory of DivIDE / DivMMCHere is new utility for testing DivXXX ram memory: [url="http://velesoft.speccy.cz/zx/divide/software/divramka.zip"]velesoft.speccy.cz/zx/divide/sof…
Here is new utility for testing DivXXX ram memory:
[url="http://velesoft.speccy.cz/zx/divide/software/divramka.zip"]velesoft.speccy.cz/zx/divide/software/divramka.zip[/url] -
sam coupe with external 1mb ramvelesofts site has snaper disks: https://velesoft.speccy.cz/sam_zx128.htm when you use masterdos to detect the external 1mb of ram interface th…
... detect the external 1mb of ram interface then the snaper emulator ... lets you select the fast ram and the zx spectrum game ... uses this ram above 32768 this gives you ... -
Sinclair 16k Ram pAck Issue3 schematicsHi guys, I am willing to repair a 16k ram pack for the ZX81 but I cannot find any schematic of the ISSUE 3 ram pack. I could only find a schematic…
... willing to repair a 16k ram pack for the ZX81 but ... schematic of the ISSUE 3 ram pack. I could only find ... and replace them with 8118 ram which requires only +5V. Problem ... desoldering one of the 4116 ram, I lifted the tiny little ... -
48K Issue 2 RAM issuesI have 48K issue 2 board (I've checked, the upper memory is present!). It's not very well. I've not attempted to diagnose one before, so please bear …
... are only in the upper RAM as it will actually boot ... -
Help request for an injured Issue 4A spectrumHi folks, I'm hoping to resurrect an issue 4A spectrum that has been in my hoard for a couple of decades since buying it for spares. Someone ha…
... 4 of the 8 lower RAM banks were nackered.
ram, but not inserted it yet ... as i'm still hot happy with the power - it ... require 12v aside from lower ram was the LM1889 - should I ... -
The Complete List Of The Causes Of Lower Ram Failure?Well the aim is to get a comprehensive list.I ask this because I know very little about it . I know that failure of "power supply" related capacitors…
Well the aim is to get a comprehensive list.I ask this because I know very little about it . I know that failure of "power supply" related capacitors can do this . But I suspect there are loads of other ways to damage lower RAM ICs? Any ideas? -
upper ram tacks / TR4 socket...[url="https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7"]https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7[/url] you can only replace that pesky TR4 so many t…
... would just fry the lower ram again .. this is one board ... like somebody attacked the upper ram with a black and decker ... sugestions for replacing the upper ram tracks ? -
zx spectrum display corruption .. with lower ram module installed[img]https://photos.app.goo.gl/Gu6rjC5v21sZxwTX9[/img] [img]https://photos.app.goo.gl/FznVw8SkbbhWn5mh7[/img] another specie question : i have …
... video corruption, it has lower ram module fitted.. can get it ... it shows lower ram as good and upper ram not detected although ... start digging at the upper ram, or the 4 logic chips ... that drive the upper ram.. i am presuming that one ... -
Paging for 64Kb of Video Ram??? What is the best way to page this?Hi all, I'm just putting together a concept card for a "Loki" style of video card, which supports shadow ( so it fits a normal Speccy ) and also t…
... single 48K video page with RAM relocated to the ROM space ... -
Using a thermal camera to fix speccy's.Hi All, Thought I'd share another repair... Got a board that collapsed the bench supply straight away ( I run a bench supply and give it just enou…
... right is the 16 K ram chips. The ULA can be ... spot isn't all that hot in reality ( I can't ... 8 4116 IC's are hot. That's what's dropping ... I pull one of the hot ones out, and sure enough ... -
Built a ZX Spectrum that works, but can't get the upper RAM to work?Like the title says I finished my Spectrum 3B board, and it boots, but it doesn't see the upper 32k of RAM. When it boots, the lower 16k works f…
... see the upper 32k of RAM.
When it boots ... programs and even run a RAM diagnostic. Basically, tells me that ... all the associated logic, and RAM chips, with no effect. I ... direct connections between the upper RAM and associated logic, and I ... -
Max RAM for ZX Spectrum gamesHow much RAM can be used for single level/whole game? On tape writing.
How much RAM can be used for single level/whole game?
On tape writing. -
Can somebody help me with this?One of my "friends" shoved a piece of metal into the back of my spectrum (48k RAM) and now whenever I try to use it theres nothing but weird lines an…
... all, save for getting excessively hot - about the only touch test ... is on the 8 lower RAM ICs.
other than ... -
Broken ZX Spectrum + (48k)Hi! I just got a ZX Spectrum + from a friend. He said it was working around 8 years ago when he put it into the cellar. It was in great condition - …
... suggested a faulty lower 16k RAM ... and that I should first ... check the voltages (since those ram's use 2 different ones ... one of them is running hot - if that fails try and ... -
Why does my computer reset when downloading torrents?I have tried various torrent downloaders, ran virus and spyware scanners but still it does it. When I am not downloading torrents my system runs fine…
... occasions it's been really hot weather...
I can ... CPU, 128Mb GeForce, and 256Mb RAM
with a 120 ... -
Why does my computer reset when downloading torrents?I have tried various torrent downloaders, ran virus and spyware scanners but still it does it. When I am not downloading torrents my system runs fine…
... occasions it's been really hot weather...
I can ... CPU, 128Mb GeForce, and 256Mb RAM
with a 120 ... /> It could also be your RAM failing. I had the same ... my friend suggested changing the RAM.
So I borrowed ... -
OT: PC boot solution anyone?A long shot I know, but what the hell! The thing is this: My Asus K8V SE Deluxe mobo seems to be suffering from a problem. Specifically with the BIO…
... fan as processor wont be hot enough to give an error ... system, if not, test your RAM! -
Speccy MTBFHi, Looking at the old (issue 1-2) PCBs, they do look like someone knocked them up in an etching bath/with a soldering iron in their shed but has th…
... most reliable 8 bit computer. RAM death is all too common ... these failures too. The extra hot regulator heatsink literally burned through ... +2s were pretty bad for RAM death too. The redesigned +2A ... -
Dead Spectrum diagnosis and desolderingI have two dead Spectrums - one I'm pretty sure is caused by bad memory, and the other - well, perhaps a bad ROM, perhaps a bad CPU (it gets halfway …
... sold with special nozzles directing hot air only to selected part ... />
BTW, as to dead RAM, you can search russian sites ... least low part of your RAM (6K screen area) and your ... -
Dead Spectrum diagnosis and desolderingI have two dead Spectrums - one I'm pretty sure is caused by bad memory, and the other - well, perhaps a bad ROM, perhaps a bad CPU (it gets halfway …
... will have to get a hot air blower, I used one ... , it depends on some display RAM working. It's very clever ... if you have some bad RAM, it'll show which chips ... a very nice little replacement RAM also, available on the same ... -
Nooooo my speccy died!??!!Hi! I am quite sad. :( Tonight I got a kempston interface so I rushed home to try it on my spectrum+ The edge connector of the interface was narrower…
... br />
4116 lower RAM block 90% likely
... 4164 upper RAM block 50% likely
... find one or two getting hot - replace these. Not ... all broken chips will get hot though, in fact, ... />
Then check upper RAM, then the Z80 and then ... -
MultifaceOne Vs Multiface128Is there any advantages to having a Multiface128 as opposed to a MultifaceOne for the 48k rubber speccy? Currently I have the M1 and sometimes get s…
... and while it is still hot and liquid, i sweep it ... all to familiar with zx81 ram pack wobble woahs I figured ...
