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Did I killed my Speccy ???Hi guys, 1 minute ago I was working on my 128 +2A... But I made a mistake : I cut the gound on the PSU plug of the computer, and I forgot to resolde…
... you won't get a replacement part for that ULA and ... the equipment.
NEw RAM chips can be got off ... 't just solder in the RAM) and then fit the new ... RAM chips. Power up and if ... to initialise a 32K upper RAM block :( Day three at the ... -
Did I killed my Speccy ???Hi guys, 1 minute ago I was working on my 128 +2A... But I made a mistake : I cut the gound on the PSU plug of the computer, and I forgot to resolde…
... />
[QUOTE=DEATH;172500]4464 RAM chips mnore than likely. Hot ... you won't get a replacement part for that ULA and ... equipment.
NEw RAM chips can be got off ... t just solder in the RAM) and then fit the ... new RAM chips. Power up and ... -
Did I killed my Speccy ???Hi guys, 1 minute ago I was working on my 128 +2A... But I made a mistake : I cut the gound on the PSU plug of the computer, and I forgot to resolde…
... you won't get a replacement part for that ULA and ... the problem of finding a replacement. Older ULAs seem to always ... voltages around the place. The RAM frying may have shorted and ... -
16k Spectrum.How come emulator's in 16k mode don't provide 32 ram-pack support.
[QUOTE=chop983;173529]do ram packs change the copyright screen ... 'd have to provide a replacement ROM, which is something the ... an unnecessary expense in a ram pack. -
Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…
... of the old-style RAM and replace them with ... effects achieved by lack of RAM refresh will be lost ... DRAMs?): You get the RAM chip count reduced 4 or ... 8 times. Old RAM drains lotsa power.
... longer be needed by the RAM replacement?
There ... -
Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…
... longer be needed by the RAM replacement?
[/QUOTE]
12 ... -
Feel my pain......or sit back and laugh yourself sick. Recently upgraded to XP Pro. Getting intermittent crashes/reboots - nothing in event manager. OK reinstall …
... who did have a dodgy RAM chip.[/QUOTE]
RAM and was invaluable for ... swapping out various combinations of RAM? If you find a ... RAM) then you know that you can get a free replacement ... said friend with faulty RAM didn't know you ... -
TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... running half a gig of RAM.
Not only that ... /> Astec may still make a replacement component - if not, the later ... -
TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... problems. Power cirquit, z80, upper ram, tr8/9, lowsy picture quality ... checked out, rom z80, ula, ram everything. When i powered the ... /> I'm running short on replacement parts, specially ULAs and ROMs ... -
It's fitting...... that in the very month that the 25th anniversary of the Speccy falls on, I'm just finishing up making my first ever Spectrum peripheral. It's a …
... paging part properly with a replacement BASIC ROM image (The Gosh ... (i.e. don't touch RAM for a while and then ... a ROM checksum program to RAM (the RAM test passed by this ... -
Spectrum 48K ROMHi Can anybody help I have an Issue 6a Circuit Board which has a faulty ROM Chip. Is it possible to program a ROM Chip with the 48K ROM and fit it as…
... fit it as a direct replacement, If so which chip would ... these links may be the RAM chip type selection jumpers, but ... -jumpers. One deals with the RAM type ( they were usually TI ... -
RGB OutputWas there ever a device available for the 48 that had a RGB output ? As an alternative , what about using a pc monitor (iirc these have seperate syn…
... 'm thinking of making a RAM replacement board with modern SRAM for ... -
Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…
... 15) and have quadruple redundancy RAM...
If replacing a ... was planning a daughterboard for RAM replacement and so as he's ... />
Old Amiga motherboards and RAM expansion cards could be a ... maybe use the extra RAM as a RAM disk of sorts - like ... -
Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…
... /> Hmm... I wonder if dodgy RAM was the cause of my ... insisted they replace it. The replacement has been fine ever since ... -
I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…
... (Which in turn kills lower RAM. The TMS4116 datasheet says that ... Spectrum project - not a ULA replacement, but for a CP2200 based ... set of DRAM replacement daughterboards - one for lower RAM, one for upper ... RAM, which use a ... -
Broken SpectrumsChaps ( & Mrs Death ), I was looking at getting some dynamic ram chips for the next phase of the Harlequin stuff, and I started thinking...... I've…
... of some dynamic ram for my harlequin/ULA replacement prototype was my ... -
Broken SpectrumsChaps ( & Mrs Death ), I was looking at getting some dynamic ram chips for the next phase of the Harlequin stuff, and I started thinking...... I've…
... of some dynamic ram for my harlequin/ULA replacement prototype was my ... a daughter board for lower RAM that uses easier to get ... -
ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... to access the lower 16K ram. What happens during the refresh ... pulses....... So will my ULA replacement ;-) )
Watch out for ... -
Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …
... machine like the RAM, and if you need a replacement come see ... -
Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …
... machine like the RAM, and if you need a replacement come see ... -
Faulty M1 LineHello, I've got a new DivIDE but it's not working with my Spectrum 48k+. I've got a sneaking suspicion that it's a faulty M1 line. Is there any way …
... to remove a faulty upper RAM chip. Only ever done it ... socket
d) Pushing a replacement chip in.
The ... -
Did you have a 128k version Spectrum or only 48k?In the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=20495"]thread[/URL] discussing extra features of 128k games it seems like it ofte…
... it to check the extra ram was there - and if it ... />
I had a Cheetah RAM pack too. The first one ... not getting refreshed, but the replacement worked just fine and still ... it.
My ZX81 RAM pack wobbles like crazy though ... -
True Spectrum laptop (no emulation)[url]http://user.tninet.se/~vjz762w/[/url] Hi All, I have build a speccy laptop, battery part is not ready yet.... I did it on 2 days, I will put s…
... measure directly at the ULA replacement, because I can't get ... since without ULA
all ram chips is in standby..... Cut ... -
48K games that don't work on a +2Not sure if there is already a thread about this but recently I've noticed some old 48K games will not run on my +2 - even in 48K mode. Examples are…
... is to use a ROM replacement tool (like "The Ghost ... to give you 64K RAM. Any program that relies ... />
12) The RAM disk is different between the ... />
13) The RAM contention models are different between ... 3 is contended, but RAM on odd pages is ... -
Reproducing the Multiface 3 - possible within reasonability ?Has anyone of you ever done that ?
... need the DivIDE with extra RAM, in which case you could ... divIDE, as this has 32K RAM which is more than enough ... else from writing a TM-replacement for ResiDOS (apart from a ... -
48k disk basicWhen trying to use the CP/M colossal cave adventure .DSK file at [URL="http://www.alchemistresearch.co.uk/"]the CP/M section of this site[/URL] I got…
... ]
It's a replacement ROM by Ian M. Collier ... normal tape system. It maps RAM into the area normally occupied ... -
Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…
... you had to fix the ram or psu switching circuit first ... , but TR4 was dead. After replacement power supply voltage still drops ... -
ZX128/+2 unrainer (HAL10H8)[url]http://velesoft.speccy.cz/zx/umbrella/umbrella.htm[/url]
... ).
...
But 100% HAL replacement = use PAL (i can add ... look for other reasons like RAM timing?
Ingo ... -
4116 DRAM for 48KSomeone told me I got faulty RAM in my broken 48K. They should be 150ns, right? What would be a good place to buy them from?
... replacing it with a static RAM (32K x 8 bit, only ... multiplexed address bus for lower RAM, so I connected an 8 ... reads / writes to the lower RAM. Snow gone, normal operation 100 ... small PCB as plug-in replacement -
Your help needed![FONT=Arial]there are [URL="http://www.worldofspectrum.org/neededscreens.html"]a number of titles[/URL] (146) that still lack an in-game scre…
... once loaded
[I]Ram-Jet+3[/I] - doesn ... D
[B]Ram-Jet+3[/B] - This tapefile ... 16K ROM image of the "Ram Jet +3" device ( ... is different from the Ram-Jet +3 image that ... various configurations (NMI activation, replacement ROM etc.. etc.. but ...
