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Faulty 48+Hi I picked up a pile of Spectrum kit including a boxed "untested" 48k+ The Speccy boots to this screen... [IMG]http://www.scotek.net/zx spectrum/…
... look rather like a typical lower RAM fault. Are all the power ... -
48k Missing D15Got a 48k here that is missing D15 (just below right molex connector), someone removed it in the past, only just noticed it was gone after replacing …
... indicate that most of the lower RAM is toast (I could reproduce ... -
48k Missing D15Got a 48k here that is missing D15 (just below right molex connector), someone removed it in the past, only just noticed it was gone after replacing …
... 't necessary mean that all lower RAM chips are broken. I've ... -
48k Missing D15Got a 48k here that is missing D15 (just below right molex connector), someone removed it in the past, only just noticed it was gone after replacing …
... 't necessary mean that all lower RAM chips are broken. I've ... -
Looking for list of ZX game release dates.Bit of a long shot, but does anyone know where they might be a list of Spectrum games in order of release date (to the nearest month rather than year…
Cheers, I'm not sure how to do it exactly. I can download the files and browse through them, but I'm not seeing release dates on any games. I can see some issues of Crash, but I think Crash started in early '84 or so? -
Calling people with Diagboards.....and who have toastracks or grey +2's with all socketed memory :) I'm finishing off modifications to the Diagboard firmware to expand its testing c…
... of test on the available RAM:
[LIST]
[*]Random fill test (exercises the RAM RAS/CAS circuitry)
[/LIST ... updated firmware does this for lower RAM, then depending on model does ... for the upper 32K of RAM
[*]128K - pages in ... -
Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... /> Go with Zorn's advice, lower RAM is suspect number 1 - check ... -
Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... , my second suspect after the lower RAM and its power supply would ... be an upper RAM IC interfering on the data ... -
Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... /> Voltages at Regulator and all lower RAM chips are present and correct ... -
Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... ]Voltages at Regulator and all lower RAM chips are present and correct ... -
Defective +2 grey with only random coloured screen while powering onHi, so the story goes: After buying myself an divIDE and a grey +2, this runs well for a few days. But while playing a game the picture stucks and …
... defective Speccy with two Hardware-RAM-Testers.
Here are ... 48k-Test) shows defect in lower RAM, but doesn?t suggest which ... chip.
RAM Tester 2 suggestion with steady ... buy me 1-2 spare RAM chips and post the results ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... issue or did you replace lower RAM also?
Just that ... how that would influence the RAM faults!
B -
Fuse 1.1.1 releasedOn behalf of the Fuse team, I am pleased to announce the 1.1.1 release of Fuse. The changes from the recent 1.1.0 are relatively minor, mostly correc…
... no peripherals.[/QUOTE]
Not just you. I managed to ... of copy-protection that's not seeing the value it wants at ... -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
some will argue with me, and they would be right, there are other things you could try first.
However, go see a forum member, Zorn - get one of his lower RAM modules and fit it. I'm 98% sure your problems will vanish.
:) -
Fuse 1.1.1 releasedOn behalf of the Fuse team, I am pleased to announce the 1.1.1 release of Fuse. The changes from the recent 1.1.0 are relatively minor, mostly correc…
[QUOTE=aowen;765031]Not just you. I managed to ... of copy-protection that's not seeing the value it wants at ... was just missing a trick! Not to worry, the TAP version ... /> Are we going to be seeing a new Fuse release any ... -
Weird output...Last week I found my old ZX Spectrum 48k and I tried to connect it to my tv... After tuning it (at 583MHz - C35, it's the only one with signal) it s…
... looks very much like the lower RAM in the computer has had ... have caused the other (shorted lower ram can kill TR4, or a ... supply failure can kill the RAM)
On the plus ... -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... , Zorn - get one of his lower RAM modules and fit it. I ... -
Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…
...
Make: RAM
Edge conn: ZX81 size ... Notes: /RD not decoded
Make: RAM
Edge ...
Notes: /RD not decoded, no pull-up resisters ...
Notes: /RD not decoded, no pull-up resisters ... -
Jet Set Willy OnlineAnyone playing this at the moment? I'm aiming to be online rest the next hour
[QUOTE=Graz;765985]Works perfectly! Hurrah.[/QUOTE]
Hmm, I'm not seeing any games :( -
48k black paper white borderI recently sold a speccy to a guy, unfortunately the power supply didnt survive the trip, so on replacing for him it seems neither did the speccy! H…
... ive put him onto Zorns lower ram module for ease of use ... -
48k black paper white borderI recently sold a speccy to a guy, unfortunately the power supply didnt survive the trip, so on replacing for him it seems neither did the speccy! H…
... 't see it causing a lower RAM failure as there wouldn't ... causes knock on effects to RAM voltages etc.
I ... day then suffer an upper RAM failure!
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The Cassette Comeback?[url="http://gizmodo.com/sony-crams-3-700-blu-rays-worth-of-storage-in-a-single-1571508568?utm_campaign=socialflow_gizmodo_facebook&utm_source=gizmod…
... ![/QUOTE]
I'm not attempting to be unfriendly or ... be quite acceptable, but not the lower priced sub 100 pounds ones ... , that one day I might not be able to get the ... -
FREL Comcon Programmable Joystick Interface not working on 128k but on 48kAnother day, another problem :-) My FREL Comcon Programmable Joystick Interface [url]http://www.worldofspectrum.org/infoseekid.cgi?id=1000070[/url]…
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... :
1. (With 4116 RAM installed): Speccy sends a low ... symptom (2.) appears when the lower RAM replacement module is being supplied ... effect of making the 4116 RAM only just readable.
Spectrum Plus display issueHi, does anyone know if this is fixable at all by someone with no experience? From looking on a similar post on World of Spectrum forum they mention…
... circuitry and at least one lower RAM chip are faulty here (a ... further guess is that the RAM failure is interfering with the ...Spectrum Plus display issueHi, does anyone know if this is fixable at all by someone with no experience? From looking on a similar post on World of Spectrum forum they mention…
... of a machine with no lower RAM and working CPU - you'd ...Upgrade ZX Spectrum 128,+2,+2a/b,+3[B]1. Debugging RD #7FFD ZX Spectrum 128,+2:[/B] [url]http://zx.clan.su/forum/8-121-1#795[/url]
... ports in one byte is not meaningful, because for use .sna ... the status of a port, not a compilation of bits of ... Profi Interface (PI), for us, not having various clones, this hw ... , PI offers reading of not only linear RAM page number 0- 63 ...New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
... posted can be caused by lower RAM failure, or by a CPU ...Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... little more Zorn sells replacement lower RAM boards which replace all 8 ...Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... on screen, the rest of lower RAM might be OK.
lower RAM replacement module from here: [URL ...
