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Searching for correct Betadisk 48k TR-DOS v4.12 ROM (Save ROM via TRDOS-Prompt to Disk)Hi, I have two ROM-Files which should be read out from an original Betadisk 48 Interface TRDOS v4.12 (ROM-Size 8k). But when I compare them, they…
...
Sadly I have no original 8k Size ROM anymore ... out, because my Beta-Disk 48k was upgraded to
Vision ... -
Replacement speakers for 16/48K SpectrumsThought I'd share a source of replacement speakers for the 16/48K machines: http://uk.rs-online.com/web/p/miniature-speakers/7903975/ (Equivalent…
... replacement speakers for the 16/48K machines:
http://uk ... driven directly from the ULA (no TR7), so if fitting one ... -
No serial numberI recently bought a 1982 issue 2 spectrum which I believe is a 16k upgraded to 48k. There is no serial number on the case. Does anyone know why th…
I recently bought a 1982 issue 2 spectrum which I believe is a 16k upgraded to 48k.
There is no serial number on the case. Does anyone know why this is?
Thanks Paul -
video quality issue on 48k machine after composite modHello! I just bought an 48k spectrum and did the composite mod. Unfortunately it did not end up as good as i hoped for. The screen after reset looks …
Hello! I just bought an 48k spectrum and did the composite ... have the Framemeister XRGB mini: no difference)
-i did remove ... help either
-it is no matter whether i put in ... -
No colors on screen, issue 2.I have a 48k issue 2 with composite mod. When i first pluged it in after i bought it, the screen went yellow and after restart there were no colors a…
I have a 48k issue 2 with composite mod. ... and after restart there were no colors at all. The games ... changed VR1 and VR2 with no success. Any ideas? The power ... -
48K Issue 3B ROM to EPROM methodsHi folks, While fixing up a completely dead Commodore PET I needed a way of testing the 4116 RAM chips that make up its 32K, some googling found a…
... a 27c256 EPROM containing the 48K ROM and a diagnostic ROM ... ROM this seemed like a no-brainer. IC13 was already socketed ... I either got a crashing 48K or crashing diags.
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…
... /> A friend gave me a 48K rubber keyed Spectrum. I brought ... and plugging it back in. No difference. All I am getting ...Dead 48k and +2I have a couple of questions. My old 48k had a very wobbly power socket so bought a new one and soldered it on. It will not work at all now? Is ther…
... of questions.
My old 48k had a very wobbly power ... ) then nothing? Will no longer power on. No red light?
12V ripple with lower ram installedI repaired a speccy this week. Before doing anything I replaced all caps and measured the transistors in the power section. When doing this I found t…
... it but no difference. Then removed and socketed all lower ram. turned ... on the scope. Inserted a lower ram module and the speccy ... working great. Then removed the lower ram module and reinserted all ... original lower ram ic's. Speccy is ...What's the best solution for audio loading on a 48k?I have three 48k Speccies. All have been recapped and AV modded, but only one (an issue 4A) is currently loading via Teezix. (the other two (issue 3…
I have three 48k Speccies. All have been recapped ... their borders a bit, but no dice)
Is there ...Black screen on 48k+Hello peeps Just bought a 48k+ was working fine then after leaving it off over night I turned back on to get a total black screen, no border etc. …
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Just bought a 48k+ was working fine then after ... get a total black screen, no border etc. Just black all ...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…
... has had all of its lower RAM replaced, TR4, TR5 as ... machine and get the same fault. The fault doesn't transfer to ... set out with another set, no difference. The voltages on the ...A focus on old TVs for 48k spectrums The old 48k Spectrum is becoming harder to use "display wise" in its original state. This thread is about retaining originality and not going down …
The old 48k Spectrum is becoming harder to ... fine tune it to a 48k Spectrum so that it provides ... : both these sets come with no remote and do not appear ... easy to tune to a 48K Spectrum without the said remote ... to unite then with a 48k ZX Spectrum to get a ...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…
ZX Spectrum 48K, issue 2, boots fine.
Lower RAM OK.
When ... as it was socketed too, no other logic chips had sockets ... be more important for the lower RAM, are the voltages:
Spectrum 48k won't start any software but passes all RAM testsI have a rubber key 48k which will not start any software - it appears to work perfectly right up until the end of the tape and the program would sta…
I have a rubber key 48k which will not start any ... /zx-diagnostics/wiki/Tape-Tests no problems were found with it ...Alternative 48K keyboard/caseLooking for any alternative 48K keyboard/case ... preferably a Fuller FDS or a Transform Ltd. No DK'Tronics or Saga Emperor please (I have/have had …
Looking for any alternative 48K keyboard/case ... preferably a Fuller FDS or a Transform Ltd.
No DK'Tronics or Saga Emperor please (I have/have had those).ZX Spectrum, ZX81 and Middle SchoolersToday I gave a talk to 120 US middle school kids (7 grade) about computer science and careers in programming. I also gave them a taste of programmin…
... , after each I said way lower.
64GB,
16GB ... I told them 48k they were like, no wait that's like ...ZX Spectrum 48k tape loading issueHi guys I have refreshed a ZX spectrum 48k with a new keyboard layer and front case. The machine will power up and seems to work good. Unfortunate…
... have refreshed a ZX spectrum 48k with a new keyboard layer ... checkered border on screen and no loading sound.
Any ...ZX Spectrum 48k issuesHi all! A couple of days ago I bought my first 48k Speccy off ebay (I already own a beautiful QL expanded with QubIDE interface and 640k ram). It was…
... ago I bought my first 48k Speccy off ebay (I already ... it plays some games with no apparent issues.
Sadly ...zx.zigg.net lower RAM replacement module: Still shipping?Hi everyone I'm trying to resuscitate my 48k issue 6a, and I bought the lower RAM replacement module from zx.zigg.net. The paypal payment went thr…
... resuscitate my 48k issue 6a, and I bought the lower RAM replacement ...Kempston option spazzing outHi again I have a speccy 48k issue 6a. With it I have a Datel Kepston interface and a konix speedking joystick, all of them in my posession since…
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I have a speccy 48k issue 6a. With it I ... the game and ranging from no movement to constant shooting and ... interface. So I assume the fault is in the speccy.
Upgrading Harlequin 48K to 128K?I noticed this upgrade PCB on ebay for upgrading the Harlequin to 128K: http://www.ebay.co.uk/itm/ZX-Spectrum-Harlequin-48K-to-128K-Upgrade-Addon-PC…
... .uk/itm/ZX-Spectrum-Harlequin-48K-to-128K-Upgrade-Addon-PCB ... like just a RAM upgrade? No AY and I can't ... of a 128K inside a 48K case.Interface 1 RS232 Just Speccy 128 (again)ok so i started this post in the wrong section so here it is again. [b]thesender[/b] [i]Im a little perplexed I have a 48k Spectrum+ with Interfa…
... via rs232 and have no problems pushing stuff back ... send or receive anything no matter if im in ... rs232 port and no the JustSpeccy has no serial port [/ ... show that it uses pin Lower 13 (~IORQULA). This pin ... edge connector on the 48k or +2 specifications instead ...Issues with Spectrum 48K on SCART input of LCD displaysHi *! I'm new to the forums, but not new to ZX Spectrum. I have bought a ZX Spectrum 48K in 1983 and own it since. It was stored some 20+ years on…
... have bought a ZX Spectrum 48K in 1983 and own it ... soldering, but if there's no other way than replacing capacitors ...Another 48k Speccy acting as a 16K model.Hi all, I originally was going to post asking for help to fix the new addition to my family a very nice condition Issue 2 sold on ebay as a 16K model…
... up... and oh its a 48k speccy.... Oh well bonus. It ... I powered her up, again no problem, did the memory test ... logic test points in the 48K service manual I came across ... thing fires up as a 48k model now ...whooooppiieee....still a ...No CLK on issue 2 ULA pin 32I'm trying to fix an issue 2. The symptoms are as follows:- Black and white bars on screen, colours near impossible to tune in, although these po…
... these pots are fiddly..
No CLK signal being generated on ... board as tested on the lower ram chips.
It ...The "Big Issue" about the ZX 48K rubber key Spectrum . Which Issue is best? There is no easy answer as every 48k rubber keyed Speccy owner will have their own favourite so it will be pretty subjective . But my favourite a…
There is no easy answer as every 48k rubber keyed Speccy owner will ... an Issue 6A rubber key 48k . I got it cheaply on ...How much can you get into 48k?Todays experiment was to see how long, how much text, a PRINT statement will hold. I filled it up with * and counted them and got 689 chrs. Almost 22…
... text I can get a 48k Spectrum to hold. I dont ... 8x8 and I'll get no advantage. Even if there can ...Afterburner rom showing sound options in 48K mode?I am running an [i]Afterburner (1988) (Activision)[/i] rom (which I can't remember where I got it from) that shows the music or sound effects choice …
... choice at the beginning in 48K mode, wether on emulator or ... real hardware. However, there is no sound at all, even if ... AY-sound interface to the 48K?Need help from people with a 48K/128K/+2 (not +2A/+3)Scared ya, didn’t I? Well, this one is very simple and not as involved as [url="https://www.worldofspectrum.org/forums/discussion/55142/need-help-fro…
... to make sure there are no unpleasant surprises, so I’m ... sound is played, but under no circumstances should it appear anywhere ... .
[b]Note to 48K users[/b]: test as described ... in both modes, i.e. 48K and 128K.
Thanks ...
