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Issue 2 black paper white borderGot an issue 2 here that has a 6c001e ULA, no cockroach, no transistor mod (although you can clearly see on the top of the z80 and on some legs, some…
... excellent RAM upgrade for the lower memory so I know thats ok ... -
JSW1 - Game Loader DifferencesThere were four releases (five if you count the PGC bugfix) although with a few exceptions the loaders are about the same. [B]Loader: Pre-Production…
... code is loaded at a lower memory point to allow the Speedlock ... saver to sit in upper memory.
This saved the ... whole lot from screen memory downwards. Unfortunately, the 'save' did ... -
Understanding DRAMI think I am going slightly mad. My hardware knowledge has got more rusty than it should have done, and I am going to have to turn to the experts to…
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4116 chips - i.e: lower memory are 16k bits. They are ... -
48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…
... 'm quite sure that the lower memory chips are ok.
All ... ) working ULA, CPU, ROM and lower memory.
Two wires of ... -
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…
... and the voltages at the lower memory when turned on are -4 ... -
Next step for fixing my speccy?Hi guys, I've picked up my faulty Spectrum aiming to fix it. So I followed the excellent JouledperCoulomb videos on Youtube for the basics and I am …
... been a reason for failing memory and it does not ... am afraid whatever killed the memory will also destroy newly ... installed memory?
Are there ... / should check before replacing the lower memory?
Thanks,< ... -
Issue with Issue Two[img]https://dl.dropboxusercontent.com/u/25300140/Spectrum/Edited_ImageEasyImageEditor_20141111_84.jpg[/img] I'm working on an Issue Two that was sh…
... border. I changed the upper memory and the result is as ... .
Is it the lower memory then? -
another non working issue 3 48kHi all, next! :) I don't have good filings about this speccy :) https://youtu.be/D9qpCR18-kI here is short video what this speccy do. we hav…
... -5 on leg 1 at lower memory chips, i change ztx 650 ... -
16k and PEEK 40000 (on a real 16k Spectrum)?Imagine a real 16k Spectrum (without any RAM expansion or circuits fitted). What would I get if I do a PEEK or try to access memory over 32767? Wo…
... PEEK or try to access memory over 32767?
Would ... mirror of what's on lower memory (would it be different if ... -
WANTED: tape replacement for +2?Any tape replacement possible for a +2? My +2 works wonderfully but the incorporated datacorder is simply worn out and won't load ANYTHING. Dirty sig…
... one. The ULA with the lower 16K of RAM, and the ... to read or write the lower 16K, the ULA halts the ... finished lets the processor access lower memory through the resistors. A very ... -
TAP files for the TS 2068Hi, just recently bought a TS 2068 and found "Taper" on the web. Downloaded it and began to use it only to discover that it would not open TS 2068 fi…
... 's BASIC uses more lower memory and may overlap a ... or UDGs are in upper memory, or assumes BASIC starts ... the BASIC program in memory and the UDGs were ... the only things in top memory. In addition to the ... "OS RAM Routines" in lower RAM below the BASIC program ... -
University DissertationI'm in my second year of a Computer Software Development Degree, and have to produce over the next 13 weeks a mini-dissertation that leads in to my d…
... ) The machine emulated must have lower memory.
3) The machine ... -
helpHi, I am new to this forum. I have purchased a Speccy from ebay but I am having trouble getting any games to load. I dont really have much technical…
I got Arthurs Spectrum today - it was indeed booting in 16k mode, and needed a single replacement upper memory IC as suspected :)
happy to say now it's fighting fit once more! -
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…
... the circuit - however, those lower 8 memory ICs can often blow and ... />
as far as general memory faults - I find the upper ... % of the time an upper memory fault will not stop it ... you find the culprit - the lower memory (4116 ICs) will almost certainly ... -
Spectrum +2 faultHave recently purchased a +2 but it is not working. When you switch it on all I get is a screen with lots of different coloured boxes on it and it wo…
... either the CPU or the lower memory. Is the ROM known to ... -
Broken ZX 48kHey all. I have acquired a broken ZX 48k. It looks in good condition - tried the membrane and it is working with my other 48k very well. When you tu…
... with one of the memory chips belonging to lower 16K pretty often ... work properly afterwards, check the lower memory ICs.
[ This Message ... -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
... ) can be loaded anywhere in memory with just a couple of ... different purposes occupies much of lower memory meaning it's not particularly ... -
Turbo Imploder Anyone clued up on how to use this ? I've managed to pack a few of my own games, but I notice the default start address is always 24576, can you go…
... I could locate in high memory (as the packed code wouldn ... the SP is replaced in lower memory. -
broken ZX SpectrumHi there I was given a dead ZX Spectrum years ago, and being bored today thought I'd try it again. Its a Sinclair ZX Spectrum with lovely rubbery key…
... power converter that supplies the lower memory block, the ULA - in fact ... -
problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…
... for now :)
may be lower memory is bad too ...
I ... will remove lower memory too and place sockets for ... -
toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…
... for the tests, in case lower memory is so buggered you practically ... -
On a 48K issue 6A......how can i isolate the 32K block? I want to test if there is any fault on the 4116's , leaving the 4532's out of the equation. Will removing the …
... garbage that's in lower memory, indicating that lower memory isn't doing its ... the voltages are right on lower RAM, the 4116s are not ... -
"Lost" 48K expansionToday I dug up my Speccy after more than 10yrs of inactivity. I bought it as a 16K in 1983, than I had expanded to 48K and never had problem. Until t…
... was a short assembly language memory tester posted in the Development ... into two sets of chips: lower memory (address 16384 to address 32767 ... tries to determine how much memory the computer has by testing ... there's 8 chips for lower memory and 8 chips for upper ... -
The day after... (25year hardware woes)...so there we were, about to play some ROM-cartridge games on my grey +2... but it didn't seem to like the Ram Turbo interface, won't even boot, ju…
... usually an indication that the memory where the screen image resides ... usually a sign that the lower memory has failed (either because the ... ULA has gone bad, but memory problems seem to be the ... -
48K Speccy not workingHey, A few months ago (hope it´s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…
... that one of the 4116 lower memory chips has failed. That's ... the voltages to the 4116 memory to verify the Speccy's ... power supply to the 4116 memory:
Put your multimeter ... 4116 RAM for known good memory. -
48K Speccy not workingHey, A few months ago (hope it´s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…
... to check (once again) the lower RAM voltages, because a common ... lucky and only have dead lower memory (according to the TMS4116 datasheet ... -
Elite questionsIs there anyway to get past the lenslok screen in the version of Elite in the archive that I am using with Speculator? Or do I need the lenslok? If …
... obviously got left out in lower memory systems.
Elite 128 ... it only uses the 48K memory - it's just 128K compatible ... -
Russian clone of ZX-Spectrum 48kThe classic russian clone of ZX-Spectrum 48k [URL="http://sblive.narod.ru/ZX-Spectrum/Leningrad48k/Leningrad48k.htm"]http://sblive.narod.ru/ZX-Spect…
... must generate clock signals, refresh lower memory chips,generate YUV video signals ...
