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Sinclair ZX 48K rubber keyed faultyI bought a faulty Sinclair ZX 48 K. Power on and the screen shows only 4 vertical white bars. Nothing other happend. I swapped the ULA and it is ok. …
I bought a faulty Sinclair ZX 48 K. Power on and the screen shows only 4 vertical white bars. Nothing other happend. I swapped the ULA and it is ok. PSU is already ok.
Any idea what's wrong?
Micky -
48k spectrum restarts by itselfFirst of all hello from a newb and thank you for your help. This site has already offered me a lot of insight. I have a 48k spectrum that will boot …
... removed ands re-seated my ULA a couple of times. It ... -
Cyberbig (Animagic S.A.)So, on dm_boozefreek's semi-recommendation (he's bored of it now) I've been playing [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0010481]Cyb…
... , and this is with standard ULA emulation.
So has ... -
flickering noisy screenI have just replaced the ram and ULA. The spectrum boots up OK but the screen is very noisy/wobbly/flickering really annoying :) I am wondering how …
... just replaced the ram and ULA. The spectrum boots up OK ... -
ULA Book Price - Feedback PLEASEThe book is coming together very nicely, and I am in the process of kicking off all the administration tasks like getting ISBN numbers and setting up…
The book is coming together very nicely, and I am in the process of kicking off all the administration tasks like getting ISBN numbers and setting up with the printers.
In order to do this, I need to set the price. The intention is to try and ... -
IF1 and 48k Capacitor QuestionsHi, I am not very knowedgeable about electronics but I am willing to give stuff a go.. I have a microdrive that is not performing and for various r…
... assume is leg1 of the ULA through to a leg on ... -
The ZX-filesIt's an incredible story I found in the spanish forums (Speccy.org). Yesterday night, in a spanish TV program about strange phenomena, UFOs, etc pre…
... a ZX Spectrum with a Timex 2040 printer at home. In ... -
TS2068 twister boards (fixers)A few years I helped Anestis coordinate a group order of K-Mouse Turbo interfaces. This time it's something that might appeal to most Timex TS2068 us…
... that might appeal to most Timex TS2068 users: A twister board ... -
Former maker of Sinclair add-ons in the U.SIn my continuing efforts to find people from the Timex-Sinclair past I found two gentleman who were, at some point, the owners of Byte- Back. This …
... to find people from the Timex-Sinclair past
I found ... and sold accessories for the Timex computer. I
advertised in ... 't too late to preserve Timex-Sinclair
material, and that ... -
ZX Demos and the wow factorI remember reading a few comments in the past 3 years regarding demos. Some comments included how boring it was to see this or that effect again, how…
... good."? The DivIDE and the ULA+ are good examples of this ... -
Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…
Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that the video signal can go into Spectrum, ULA and then to standard RF socket? -
Someone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…
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I have replaced the ULA with a working one (same ... -
Programs for Timex Sinclair 2068?Hello. I was wondering if there is any WWW site with downloadable collection of TS-2068 programs. Or - if there is such corner on WOS. Can anyb…
Hello.
I was wondering if there is any WWW site with downloadable collection of TS-2068 programs.
Or - if there is such corner on WOS.
Can anybody help?
Thanks in advance.
MB -
Have a real 48k Speccy? yes ? I need your help.Im looking to run this quick test on as many [COLOR="Red"](only)[/COLOR] 48k Spectrums as possible [B][COLOR="Red"]files moved[/COLOR][/B] [URL="ht…
... the board issue, the CPU, ULA you have inside please report ... ="red"]Zilog Z80A[/COLOR]
ULA: [COLOR="red"]6C001E-7[/COLOR ... -
Static vs stacked local variables in z88dkHello everyone. I'm doing a program for Spectrum 48KB with z88dk v1.8 (XX Mar 2008), and I eventually discovered that if your local variables in fun…
... address 32768, far from the ULA's hands, while the stack ... -
Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…
... read IN 31 while the ULA is still drawing the upper ... -
Disconnecting speaker in TC2048Hello, Does anyone know how speaker in Timex is connected to motherboard? Can it be just unplugged? I would like to disable it somehow (and pass the …
... anyone know how speaker in Timex is connected to motherboard? Can ... -
Fixed schematic of zx128+2 (grey)This is new fixed schematic of ZX Spectrum 128+2 (grey model) [url]http://velesoft.speccy.cz/other/zx128plus2-iss3-schematic%28corrected_v01%29.png[/…
... and absent signal IORQGE in ULA part....
This is ... -
OMD at the Vintage Computing FestivalJust got this via Farcebook: (Also add to the list of speakers our very own [B]csmith[/B] on the Spectrum ULA) NEWS RELEASE A walk on the geek side …
Spectrum+ from ebayI recently received a Spectrum+ that I bought off ebay for about ?10 including postage. I have not tested it yet but had a quick look inside through …
... can remember. Spectrums were all ULA, transistor and RAM faults, or ...Photos from a 1987 Sinclair users meeting in the U.S.These pictures were sent to me by a fellow TS user who told me it was ok to share them online, so here they are: [url]http://www.flickr.com/photos/1…
... remember those who supported the Timex Sinclair community for several years ...+3 FaultsI have some Spectrum +3s for testing - looks like they all need drive belts. One will not start up and shows a screen of yellowy green, then one of …
... . Ah I thought - maybe the ULA - the other +3's case ...Re-inventing the wheel......TROOPER: POINT 5 First an apology, my level design sucks (well I'm not happy with it) so Trooper is taking an age to do. Anyway this game comes …
... , I ws thinking of a ULA+ version but the loading screen ...Why only 2 colors ?Maybe this question dont go on this part of the forum, but dont know what other part to ask. Why the Spectrum only can show 2 colors at time in the …
... memory. Maybe not the same ULA ?
Do you really ...So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…
... 14MHz clock that drives the ULA... so I think for anyone ...testing if speccy is fully functionalHi, There is so much mention of T states but still confused. Does this mean if an instructin is out by a T-state or more then the speccy is faulty?…
... to check the CRC of ULA, the basic rom and the ... that checks the basic rom, ULA, and Z80 processor and memory ...Hypothetically....If you were putting together a "Spectrum +4" what presently available hardware would you include. My criteria would be total comparability (or as ne…
... a single chip or new ULA's, extra RAM or anything ...VCF report and photosNot sure where to put this, exactly...but here it is, what went on at the Vintage Computing Festival at Bletchley Park last weekend. Finally I've fo…
... and faithful to the 48K ULA - all the timings and other ... effects of the ULA are the same.
Summer express game competetionHello to all. I would like announce SUMMER EXPRESS GAME COMPETETION: [B]Theme:[/B] a game [B]Deadline:[/B] 1st September 2010 [B]Target:[/B] ZX Spe…
... :[/B] ZX Spectrum 48 + AY (ULA+ allowed)
[B]Rules ... is 48K zx with AY (ULA+ allowed)
5) Basic, authoring ...
