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Adapters like the Interface IIBack in the day, I had an old joystick inerface that also had a ROM card slot, just like the official Interface II, but mine wasn't official. I used …
... have all 3 , the s2 , ram turbo , kempston 3 port.. it ... have a cart with the diagnostics on ... and a microdrive emulation ... -
Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…
... 4164 and since the upper RAM was socketed, I replaced ... out one of the upper RAM chips, and with some ... going on with the upper RAM now! To cut the ... the sockets for the upper RAM were the cheap kind and ... out of their sockets for diagnostics, the metal contacts in ... -
New Spectrum +2 owner, got problems!Hi everyone, I'm new to the Spectrum scene having grown up a C64 user, I was offered a Spectrum +2a for ?20 with no software. I decided since the div…
Can he test the RAM banks with a type-in?
I forgot if that model includes built-in diagnostics. -
Edge connector breakout board/level translator boardFor a new project I'm thinking of working on (gah, too many projects...) I'm going to be making a new edge connector breakout board. Basically what …
... , PC connected, version of the diagnostics board, is it off the ... be better to write a diagnostics module for the Spectranet, which ... Spectranet, Spectrum memory (rom or RAM) has not acutally been used ... -
New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
... -file...[/QUOTE]
Or a RAM test program...
Add ... , and it could become a Diagnostics Board see [URL="http://www ... -
New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
[QUOTE=1024MAK;717784]Or a RAM test program...
Add ... , and it could become a Diagnostics Board see [URL="http://www ... -
Corrupt paper on zx spectrum 48kHi. When I power up my spectrum (issue 3) I get the light grey border, but the paper is black and it switches between thin red vertical lines and thi…
You could make a Diagnostics Board, see [URL="http ... org/infoseekid.cgi?id=1000328"]RAM Turbo interface[/URL] with ... Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm"]RAM test program[/URL].
... If the upper 32k of RAM is suspected, you can ... -
Possible dodgy +2 - resets when loadingSo I have a grey model +2 with a recently refurbed tape deck (new belts and cleaned heads). It might be a product of bad loading, but from what I ca…
... br /> You could make a Diagnostics Board, see [URL="http://www ... /infoseekid.cgi?id=1000328"]RAM Turbo interface[/URL] with ... Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm"]RAM test program[/URL] ( ... seen a pure software RAM test program for 128k ... -
First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... ) way is to use a Diagnostics Board or a ROM board ... disable the "upper" 32k of RAM (The whole thread starts [URL ... (yours is okay) or a RAM chip that has failed.
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…
... , he suggests testing the lower RAM chips on a resistance meter ... relied on Winston's little diagnostics board, and so I can ...48k Stops loading and resetsI've just fixed the problem I had with my Issue 2 Spectrum only showing 16k memory by replacing all of the upper ram. With that job done I've done a …
... /> One minor problem: after the diagnostics, the test program says it ... , ROM stays disabled. Anyway the diagnostics work fine and will be ... helpful in fixing Spectrums with RAM problems.
Now I ...48k Stops loading and resetsI've just fixed the problem I had with my Issue 2 Spectrum only showing 16k memory by replacing all of the upper ram. With that job done I've done a …
... ]One minor problem: after the diagnostics, the test program says it ... , ROM stays disabled. Anyway the diagnostics work fine and will be ... helpful in fixing Spectrums with RAM problems.[/QUOTE]
Hmmm ...128K RAM tester as .TAP?I was sure that I've seen a RAM tester that can be loaded with e.g. DivIDE or DivMMC EnJOY! as .TAP. But I can't find it (been searching through the …
... of the diagnostics to run from the lower 16K of RAM, so ... reliably if lower RAM is good, and upper RAM is not damaged ...The Spectrum Resuscitation ThreadKicking off this thread as a place where people who are fixing/restoring Spectrums (or indeed any other piece of related hardware) can show off their…
... , we have 48K of working RAM:
[IMG]https://farm8.staticflickr ... .jpg[/IMG]
My diagnostics board doesn't want to ... tape version of my diagnostics, which assumes lower RAM is good and ...128k toast rack diagnosisHi - I recently won a 128K toast rack, and have got a Retroleum smart card. I've tried a couple of games and all seems fine...-ish.<div><br></div><di…
... the Retroleum (and my own) diagnostics don't work correctly when ... ), A
; Page in RAM page 0, select 48 basic ... in we are locked to RAM page 0 and ROM 1 ...Memory testersHi, Just wondering which software people are using to test the memory in their spectrum. I have been using Zorn's memory tester as described here:…
... tape based version of zx-diagnostics (TAP image [url="https://github ... .com/brendanalford/zx-diagnostics/blob/master/TestTape/bin/testram ... ]). It relies on somewhat working RAM though, so it's only ...New version (v0.31) of ZX DiagnosticsHi all,<br><br>Just wanted to let people know that I've released a new version of the Spectrum Diagnostics into the wild.<br><br>These were originall…
... CPU is dead, the existing diagnostics board is of no use ... the flash ROM on the diagnostics board. I'm sure doing ... machine that has no working RAM at all, due to its ...New version (v0.31) of ZX DiagnosticsHi all,<br><br>Just wanted to let people know that I've released a new version of the Spectrum Diagnostics into the wild.<br><br>These were originall…
ZX-Diagnostics can also run on a machine with no RAM whatsoever as ...New version (v0.31) of ZX DiagnosticsHi all,<br><br>Just wanted to let people know that I've released a new version of the Spectrum Diagnostics into the wild.<br><br>These were originall…
... "]ZX-Diagnostics can also run on a machine with no RAM whatsoever ...Dead SpectrumHello guys, I've just bought a dead Speccy 48k (Rubber Keyboard Issue 3 board). Basically, when powered on it initially appears to boot up ok, but in…
I would buy a lower RAM module first. The 4116 DRAM ... chips used for the upper RAM.
To really discover ... need [i]any[/i] working RAM) running from ROM helps. For ... ="https://github.com/brendanalford/zx-diagnostics/wiki"]updated software by Balford ...48k not startingHi team, I have 2 48k's, one works (Issue 4s), one doesn't (Issue 4a). The non-working one appears to start, but not finish the RAM test. The pape…
Lower RAM is what I am thinking ... CF interface with appropriate .TZX diagnostics file suffice?
I ...Spectrum +3 blinking yellow/blueI received a +3, which only gives a yellow/blue blinking border during initialization. Pressing BREAK when powering on does not work, neither does a …
... bits 0-3 of contended RAM, i.e. IC3.
RAM or page 5 is all ... . Once the firmware has some RAM to work with in this ... "Lower RAM Testing" section [url="https://github.com/brendanalford/zx-diagnostics/wiki ...Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…
... program in the battery backed RAM, but again this is not ... ZXC4 with a ROM based RAM test. It's not cheap ... also be used to test RAM as well as be used ... https://github.com/brendanalford/zx-diagnostics
That test program can ...+2 Gray ProblemI'm trying to repair a +2 gray that behaves differently at every boot up. Some rare times I can get the selection window but pretty soon the characte…
... />
Bit 5 of uncontended RAM on a +2 equates to ... can also try the zx-diagnostics tester (see my sig) which ...+2 Gray ProblemI'm trying to repair a +2 gray that behaves differently at every boot up. Some rare times I can get the selection window but pretty soon the characte…
... one, i get the same ram check error about data line ... I cant run your zx-diagnostics tester... my eprom flasher is ...Issue 4A, tests complete fine but get odd crashing problemHi all, I've got an issue 4A which has had all of its lower RAM replaced, TR4, TR5 as well as its CPU. It originally had quite high voltages (20-3…
... memory browser functionality of the diagnostics (hold M on startup to ... in arbitrary locations in upper RAM, then browse through the rest ...Spectrum 128k +2A Resets after loadingHey Everybody, I'm from Australia and I'm new here in the forums. I was hoping to pick everyones brains over a problem with a Speccy I acquired o…
... way to thoroughly test the RAM is to run a ... RAM test. For example the tape version of @Balford's zx-diagnostics ... : https://github.com/brendanalford/zx-diagnostics/wiki/Tape-Tests.
< ... makes them extra fussy about RAM, so that working chips sometimes ...Need some help repairing an issue 3 spectrumI am looking for some help repairing an issue 3 speccy, here's what I tried so far. The speccy is not booting up correctly, when using the diagnos…
Correct - the diagnostics would not run if one ... all RAM (lower and upper) removed.
Given the diagnostics doesn ... 't seem to be able to see the RAM ...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…
... lower/upper RAM.
Are you using zx-diagnostics or some ...Speccy 128k Toastrack capacitorsDoes anyone have a list of all the electrolytic capacitor values in a speccy 128k toastrack they could post...I've looked around and see plenty for …
... based RAM test in [url="https://github.com/brendanalford/zx-diagnostics/releases ...
