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Colour blocks on displayHi all, I have just acquired another Sinclair product, my first one being a C5, it's a 48K ZX Spectrum. It shows colour blocks on the display when p…
... readings within the voltage converter circuit. It's much more useful ... that either the voltage converter circuit is faulty or one or ... the power supply from the lower RAM, either by cutting the circuit ... measured to have shorted their power connections so it may ... -
Three faulty machines - help!I have three Spectrums and all of them have suddenly collapsed and I can?t figure out what?s wrong. New here.... I own three Speccies but all of a …
... do is the composite video mod: it's easy, virtually impossible ... and -5V there. If not: power off [I]immediately[/I] and ... the border turns white on power-up, and whether you see ... -
Three faulty machines - help!I have three Spectrums and all of them have suddenly collapsed and I can?t figure out what?s wrong. New here.... I own three Speccies but all of a …
... I soldered the DC power contact but there is still ... : How is the composite video mod done?
... do is the composite video mod: it's easy, ... -5V there. If not: power off [I]immediately[/I] ... border turns white on power-up, and whether you ... -
Using a Spectrum Plus 2 Gray in the USBelieve the gray has what's called a SCART video output, so would something like [URL="http://www.amazon.co.uk/EasyCAP-Video-Audio-Capture-Card/dp/B0…
... ...)
My +2 has 2 mod?s:
1 - A/V ... ?s an easy mod) to use Brazilian?s power supply (center is ... -
ZX Spectrum not working... issue 4S?Hi, I've bought a "new" broken ZX Spectrum +. The idea was to put an harlequin board inside, but for the moment I'm trying to put it in working order…
... check how the voltage conversion circuit is currently configured. IIRC ... perhaps it uses the conversion circuit from a later issue? ... matters, not transistor shape / circuit board markings.
[*]If ... it's killed instantly @ power-on. Also easy to overheat ... -
Issue 4S users... I need your help!Short story: Issue 4S spectrum don't work. TR4 seems to have pins at different places from other speccys (BCE versus EBC), and usual replacement part…
... connecting power.
I am convinced that the actual 4S circuit is ... -
ZX Spectrum 48k issue 3b power problem?Hi :) I was lucky enough to find a couple of ZX Spectrums at a car boot sale yesterday. I spent the evening fiddling about with one (issue 2) and t…
... is the crux of most power issues of a Spectrum after ... a ailing Power supply. once you have confirmed ... than ample to provide clean power as well as offer some ... . We also did the composite mod on both at the same ... -
old PC with Monocrome Monitor Out.So as discussed in the Carboot sale thread, I have brought and old Apricot Xi. It takes a monochrome monitor via a 9 pin D connector. Now I don't ha…
... need some sort of conversion circuit. Since you already have separate ... for a 7805 regulator to power a few 74HCTxx IC's ... know of a ready-made circuit / converter for this purpose. And ... -
LZ77 en/decodingI've written an LZ77 en/decoding routine as I couldn't find one around for the Spectrum. Initially I'm just doing it in BASIC to get the logic right.…
... 'end' goes past 'size' the mod makes it wrap back to ... /> If your buffer is a power of 2 in length, this ... -
zx emulation on ps3 or xbox?was looking into an emu on the ps3 but i get the impression there has to be some modding done 1st? Been told that the old xboxes are good for emulat…
... you just press the power button quickly then the ... boots up without the mod chip becoming active*). If ... emulators without needing a mod chip. I've never ... br /> * The reason some XBox mod chips can be turned off ... XBox Live! with a mod chip active then Microsoft ... -
4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…
... .
The inverter circuit introduces a delay of around ... to introduce glitches on the power supply and the ULA' ... issue 3 because the inverter circuit introduces too much delay. ... form, this SRAM replacement circuit has worked in all Spectrums ... -
48K Issue 3, noisy display.Has anyone here experienced and been able to resolve a problem that looks like this: [URL="http://drizzle.zigg.net/ZX/ZX106-display.jpg"]Photogra…
... find. After experimenting with extra power decoupling and testing several components ... one step back through the circuit, I found the video signal ... my meter indicated an open circuit between the two affected traces ... -
ZX Spectrum TowerHi all, i am working on a ZX Spectrum 48K build in a PC tower case. Is there anyone who did it before? I have some questions duo the PSU. I have to g…
... dissipate quite a bit of power (especially if there are peripherals ... internal power supply consisting of a small switch mode supply circuit that ... -
ZX Spectrum TowerHi all, i am working on a ZX Spectrum 48K build in a PC tower case. Is there anyone who did it before? I have some questions duo the PSU. I have to g…
... internal power supply consisting of a small switch mode supply circuit that ... even with a standard 9V power supply. There's a thread ... -
Using a Pinnacle pctv (pci) with 48k/+2 greyWhile I'm waiting for some news on the timex front ([url]http://www.worldofspectrum.org/forums/showthread.php?t=38182[/url]), I decided to start sort…
... ;postcount=8"]+2 grey composite mod[/URL]
The RGB ... proper RGB to VGA internal circuit to put inside my grey ... sort sometime ago, but the circuit wasn't finished... -
Using a Pinnacle pctv (pci) with 48k/+2 greyWhile I'm waiting for some news on the timex front ([url]http://www.worldofspectrum.org/forums/showthread.php?t=38182[/url]), I decided to start sort…
... ;postcount=8"]+2 grey composite mod[/URL]
The RGB ... proper RGB to VGA internal circuit to put inside my grey ... sort sometime ago, but the circuit wasn't finished...[/QUOTE]
Issue 3B only sees 16k (and RAMTOP NO GOOD on loading)A ZX+ with issue 3B board that i got recently, does not see anything more than 32768 (sometimes 37267..) on "PRINT PEEK 23732 + PEEK 23733 * 256 (Ent…
... the rear connector.
- Bad power supply, caused by cad capacitors ... (not the power brick, but the internal voltage boost circuit) don't ... every time you do a power cycle (turn off, wait a ...Power adaptor for a Sinclair 128kHi, just a quick question. Would a 48k spectrum+ power lead work for a 128k Sinclair Speccy, I have both but the power does not work on the 128k, I n…
... is usually +/- 10% for power supplies, but someone will correct ... the power plug and start measuring amps, or tap into the circuit ... somewhere.
Worst case scenario, the 1.4A power ... to having used lower rated power supplies in the past, ...Zx-81 video modHas anyone here done the zx-81 composite video mod?? I am having trouble getting it to work and the info doesn't include which kind of transistor to …
... getting any video from the circuit. I get dark video from ... applies to the composite video mod, but Jose Leandro explained what ...TR4 is goneMy TR4 transistor is burned. Can I replace this transistor with a TIP31B or C ? My 4116 RAM ic?s are showing +0.05V, +5V and +8.49V... :) My Spectru…
... output of the voltage converter circuit cannot reach its intended voltage ... cut their power supply tracks and get the voltage converter circuit working ...Does a spectrum +2 power supply work on a +3?tiny question, does a spectrum +2 power supply work for a +3?
The black +2 power supply has all the ... I have one set of circuit diagrams which says that the ... psu has a lower maximum power output so it might struggle ... to power the floppy drive.
< ... were used in +3 power supplies so who knows really ...RAM disk interface for 48kDoes anything like that exist?
... top 32K by a PCB mod that brought a 'RAMCS' line ... was. If I bring the circuit diagram close enough to see ...RAM disk interface for 48kDoes anything like that exist?
... top 32K by a PCB mod that brought a 'RAMCS' line ... was. If I bring the circuit diagram close enough to see ...Racing Games Recommendation ThreadSorry if this has been posted before, but I couldn't find any similar topics... Anyway, since racing is one of my favourite game genres I would be h…
... archive. Yougoslavia is the toughest circuit.
I like racers where ... and again on MAME. [B]Power Drift[/B] and [B]Super ...Racing Games Recommendation ThreadSorry if this has been posted before, but I couldn't find any similar topics... Anyway, since racing is one of my favourite game genres I would be h…
... archive. Yougoslavia is the toughest circuit.
I like racers where ... and again on MAME. [B]Power Drift[/B] and [B]Super ... of course exceptions where using power-ups and fighting or shooting ...Spectrum +3, Issue 2...I have just had plonked on my desk a nice issue 2 Spectrum +3. I'm not sure if its 100% working yet, as I have not plumbed it into a telly. So, assu…
has anyone got a circuit diagram for this:-
[ ... accepted/expected consequence of the mod?
or do all ...Modulator oddness - previous owner's mod?Hello, just bought a rubber key 48k Issue 3 I'm trying to fix up. I'm wanting to do a composite video out mod ( n00b at this) but the "spare" hole in…
... point. Heaven knows what that mod was supposed to achieve though ... component is C42 on the circuit diagram and was originally 47nF ... and ground on the original circuit.25 years with the SpectrumTo paraphrase JFK, ask not what your Spectrum can do for you, but what you can do for your Spectrum. Well I've done quite a bit since I joined the sc…
I was a mod somewhere else for a couple ... cared if someone called me power-crazy or didn't approve ...What (Speccy) game are you currently playing ?(Quite a few threads on what youre listening to, watching etc) What Speccy game are you currently playing ? After playing a LOT of Invasion of the …
... the individual muscles have enough power to work or something....
mod of [url="http://www.worldofspectrum ...The Collapse of Free Radical DesignFor anyone interested in how and why Free Radical (the console games developer, made up partly of ex-Rare employees) managed to go from the brillianc…
... don't require much brain power):
Serious Sam - Simple ... />
Red Faction - the Geo-Mod was just poor gimmick and ...
