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32K Expansion board for issue 1 SpectrumI realise these are as rare as rocking horse poo, but I'd really like to upgrade my issue 1 and use it a bit more than is possible currently. Don't …
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I have a lower and upper RAM module from Zorn in ... 1 equivalent for the upper RAM but the likely market probably ... start laying out a modern replacement using a two chip solution ... -
My first composite mod.Thought it was about time I gave the composite mod a go. I used a youtube video, the bloke in the video took 10 mins, I took about 2 hours :) but it…
... Zorn's lower and upper RAM module replacements, a Recom regulator replacement, and ... -
My first composite mod.Thought it was about time I gave the composite mod a go. I used a youtube video, the bloke in the video took 10 mins, I took about 2 hours :) but it…
... Zorn's lower and upper RAM module replacements, a Recom regulator replacement, and ... -
48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …
... 2 boards).
[*]6C001E-6: Lower power version, alters colour burst ... of access to the lower 16K of RAM. Found on Issue 4A ... can be fitted as a replacement to all 48K PCB issues ... -
48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …
... 2 boards).
[*]6C001E-6: Lower power version, alters colour burst ... of access to the lower 16K of RAM. Found on Issue 4A ... can be fitted as a replacement to all 48K PCB issues ... -
Introduce yourself[SIZE=3][FONT=Comic Sans MS]This is the thread to stop by & introduce yourself.[/FONT][/SIZE]
... with a fault in the lower 16k meaning it cannot boot ... lucky find on ebay), replacement CPU, new RAM chips. There's still ... -
ULAAre ULA's (for Spectrum 48k's) interchangeable through the different issues? To give some background, to work out what was wrong with an old speccy I…
... 2 boards).
- 6C001E-6: Lower power version, alters colour burst ... of access to the lower 16K of RAM. Found on Issue 4A ... can be fitted as a replacement to all 48K PCB issues ... -
Dead issue 3b with black and white barsHi all, I've been donated an issue 3b which has some nice black and white bars with a few flashing blocks. I've done a few RAM tests and could spo…
... so I used that in replacement of C1. Hooked it up ... each chip on the lower and upper RAM. They all gave consistent ... -
ZX Dandanator! Mini - Cartridge system for SpectrumsHi All, I'd like to present a little HW I've developed during the last three months. It's aimed at providing a console-like usage experience for a…
... minutes code edit, you could lower this to less than 1ms ... to load an app into RAM, next bank switching interface get ... able to have a FAST replacement of data in an accessible ... copy or decompression from another RAM location.
Take a ... -
How to Use a real Physical Old Style Retro ZX Spectrum INFREQUENTLY and EFFECTIVELY.These days a lot of WOSSERS use emulators most of the time but like to get out the old Speccy ,every once in a while ,for a quick nostalgic revisit .…
... "rubber key" Spectrum It sat lower, but that was because this ... />
1) Oxidisation
2) "Ram Pack wobble"
3) Setting ... than shelling out for expensive replacement rubber feet (all the time ... -
Emulator compatibility with real SpectrumHi emulator programmers... Having spotted for the last 6 months that my iPAQ is still missing a Spectrum emulator I started typing last tuesday - an…
... the fact that the lower part of the RAM is slower because ... -
How do I know the RAM size?Just left my parents after cleaning out my pile of old stuff in their basement. Know what I found? My old ZX Spectrum.... Those were the days! Never …
... ZX81, though.
3K om RAM, my friends!
My question ... I tell what size of RAM I've got in my ... -
Replacement power suppliesIs it possible to get a replacement power supply for the old speccys? The high Amperage is a problem: 1.4A for the rubber-keyed 48K. Know where you c…
Is it possible to get a replacement power supply for the old speccys? The high Amperage is a problem: 1.4A for the rubber-keyed 48K. Know where you could get one that would handle it? It wouldn't need to be an original. -
Spectrum spares / repair jobsI recently bought a few faulty Spectrum 48+'s and have built a fully functional unit from the best bits of them, however this has left me with two pa…
... be repaired or dismantled for replacement ULA / RAM chips to repair other ... -
Replacement chipsAfter much digging around on here, it seems to be the general consensus that the ULA could be causing the problems im having (spectrum is deaf to the…
Clone Project feedbackFinally i now have some time to start again with my clone project. I have decided to drop the 48k project and go directly on a 128k clone. This migh…
... is not to do a replacement board or to emulate other ... /> - CPU: Z80C
- RAM: >= 512k
- Video RAM: 256k (512k)
HELP 4532 or 4864 RAM wanted !Hello My real spectrum fell off yesterday I know that one RAM memory chip is out of order There was 8 X HM4864P-2 but I saw in the Spectrum schemati…
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I know that one RAM memory chip is out of ... here to set 16K of RAM so 32K are enough to ...RAM Music MachineBoxed RAM Music Machine Sampler (for 48K, Plus, 128K, Plus two) includes the tape, microphone, manual, even original mic stand! I last got this wor…
Boxed RAM Music Machine Sampler (for 48K, ...Boxed 32k Ram packPicked one up a few weeks ago at a car boot sale with a boxed 16k Speccy. Is the ram pack worth anything? Not seen any on Ebay. Thanks in advance, G…
Picked one up a few weeks ago at a car boot sale with a boxed 16k Speccy. Is the ram pack worth anything? Not seen any on Ebay.
Thanks in advance, Gnormanconvert tzx/tap back to wave file for playback by mp3 player to speccyOk, so here's the problem. I want to be able to use my mp3 player to play back mp3's of tzx/tap files, so i can load software directly into my trust…
... speccy (using as a direct replacement for tapes).
I have ... as the playback tone sounds lower than the original tap file ...Voltage regulator replacement?I have an 48K issue 3B that has (for unknown reasons) had one of the legs on the voltage regulator broken off. It looks like a simple replacement job…
... . It looks like a simple replacement job that someone ham-fisted ...Spin save dissembly problemHey Dunny and others Spin dudes! There seems to be a small problem with the save dissembly function from the dissembler in Spin. This is the exact o…
... output from a section of RAM.
[CODE]
org $67c2 ... the problem of either a lower case L prefix or extra ...R Register, Contended RAM and ClonesHi. I've had a quick look at the CSS FAQ but didn't spot quite what I'm looking for (also the CSS FAQ doesn't have much detail of the clones - there …
... is the effect of contended RAM on the R-register? I ... run any code in contended RAM, but I do make several ... , but then without the contended RAM the HALT would take place ...RAM Test ROM?Found a link to this: [url]http://www.retroreview.com/iang/TestSpec4.zip[/url] in another thread, and fired it up in SPIN, but I have no clue how to…
... this to determine which physical RAM chip needs replacing, and/or ...replacement +3 psuok, who would be kind enough to help an idiot build a replacement PSU for the +3 / +2a , from a PC power supply? Guesser has already helped out a gr…
... help an idiot build a replacement PSU for the +3 / +2a ...256K RAM chips in Spectrum 128KSince I have lot of 256K RAM chips, and my 128K has RAM error, I think about replacing all 16 RAM (64K ones) chips with 256K chips. Then it would be …
... have lot of 256K RAM chips, and my 128K ... has RAM error, I think about ... replacing all 16 RAM (64K ones) chips with ... be 'Spectrum 512K' - something like RAM in Pentagon.
... bank switching of that extra RAM - we need 2 bits ...Where to get Spectrum RAMSigh. Even obsolete nixie tubes seem to be easier to get hold of than Spectrum RAM. I've tried the usual suspects (eBay and google searches), but not…
... get hold of than Spectrum RAM. I've tried the usual ... dead Spectrums with suspected bad RAM. It'd be nice to ...Spectrum RAM Paks...This jogged my memory (excuse the pun!!) : [url]http://cgi.ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX-SPECTRUM_W0QQitemZ150057889352QQihZ005QQ…
... ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX- ... with one of these 32K RAM paks!
My poor ... 16K model with this 32K RAM pak.
It ... them!
16K RAM paks were very popular for ...
