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ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…
... [/IMG]
The signal is very noisy. I tried ... 100mv/div. So, the whole signal is 200mv p-to-p ... -
Anatomy of a bad M1No, not the motorway (although at times the tarmac M1 goes about as well as this one...) But the bad M1 problem that seems to occur most with issue …
... noisy. I strongly suspect what signal there is at least in ... high pass filter), and what signal we see is just whatever ... break (probably including any other signal that runs nearby, hence the ... , after connecting a Spectranet, the signal gets pulled up (there's ... -
Low level microdrive programmingSo I'm on my lunch break trying to find out about low level microdrive programming (without using IF1 ROM). I see one can use port 0xe7 to read and w…
... also see there are certain signal bits available from/to port ... -
Us post office rantThe US post office is still gov run so basically it's shyte with rude employees that dgaf. I've had 2 packages go missing in the last 4 weeks..stuff…
... missing items was an internal clock board for an Amiga 1200 ... -
Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... 's because of poor fanout (signal strength)
- Bad Z80's ... -
Spectrum 128k +2 (Grey) EAR modI have mounted a mono stereo jack in my +2 and am trying to connect it to get an external EAR port to load programs from my PC/MP3 player etc. I ha…
... . It does not detect any signal when playing a MP3 version ... -
Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…
... WR pin to a write signal, and the chip enable to ... -
DivIDE emulation - NMI buttonAll emulators as I know use same way for active NMI in DivIDE mode. After press NMI button emulator make only one NMI signal. But on real DivIDE int…
... emulator make only one NMI signal.
But on real ... -
ZX 48 issue 4S no s-video possible?No s-video on ZX 48 issue 4S possible? I have had this mod on my issue 4A. But this did not work with my 4S. On C65 is no chrominance signal. Here …
... . On C65 is no chrominance signal.
Here is the ... cap). Then solder the color signal to pin 4 on s ... /> The Luminance (B/W video) signal is taken from input to ... -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... casette) is around 3.6V signal.
Any suggestions ... -
Composite output on PS3Is it meant to work?! I can't get a signal out of it to the TV (Tosh 32"LCD) I know it's got HDMI and that I should be using that, but I use compos…
Is it meant to work?!
I can't get a signal out of it to the TV (Tosh 32"LCD)
I know it's got HDMI and that I should be using that, but I use composite to record my gameplay.
Only bought the machine yesterday. -
Your TV / screen / monitor requests, please!Hi all, So I just moved house and I'm looking for a new home for my retro tech collection. Previously I've run the trusty Spectrum through a tiny 4"…
... circuitry to cope with the signal. There's always the option ... -
+2 (Grey) S-video?I have a pretty good Composite/S-video to VGA adapter that does a nice work of running my retro machines on an old LCD screen. However, it looks best…
... it with a S-video signal instead of a Composite. I ... -
Help me resurrecting a 128KHello to everybody. I'm really struggling along a repair of a standard 128K a friend of mine handed me over some (ok, actually a lot of) time ago. A…
... draw is about 780 milliamperes. Clock is spot on and has ... -
Tape loading for realHi, Having failed to load anything from my laptop or phone into my 48k, I have sourced a data recorder. An acorn ALF03. When I received the item I …
... pins 4 AND 1 for signal and 2 for ground. This ... -
Yumiko in the haunted MansionSo, here is the promised Halloween preview... Go to the zx section of my homepage to download it. [img]http://members.inode.at/838331/zx/YomikoInTheH…
... appearing for one minute
Clock: adds 5 minutes burning time ... -
New Game: Dave InfuriatorsHere is a new game for both 48K Speccy and 512KB SAM Coup? [IMG]http://i1233.photobucket.com/albums/ff397/adg2011/specyload.gif[/IMG][IMG]http://i12…
... and change direction - against the clock. Simply get to the goal ... -
Preamp Solution for Speccys?Hi, I was wondering what people were using to amplify their sound card or line level datacorder signal to a loud signal for a speccy. Is anyone usin…
... or line level datacorder signal to a loud signal for a speccy ... -
[MIA] Video Spectrum issue 18Hi folks, I'm going through a batch of VOC files from Tony (ADJB) ages ago, just I never got around to getting further due to tape signal etc. Some…
... getting further due to tape signal etc. Some are German and ... -
RGB Scart +2b GhostingHi, I purchased an RGB scart cable off Ebay a while ago to use with my +2b. Turns out the TV i had a the time didn't like the RGB signal so i put …
... didn't like the RGB signal so i put it away ... 's both pick up a signal and display menu screen. However ... the color part of the signal has shifted to the right ... -
QL composite question...Hello guys, I have two QLs, both in excellent condition with new membranes, capacitors, all plastic caps for the slots etc... Although I've made th…
... no sound in the RF signal.
Just to have composite ... to have a good composite signal coming out of the RF ... -
+2 Grey - low 128k sound volumeI'm trying to revive my old grey +2.... First problem was a faulty RF signal, so I bought a SCART cable from Retro Computer Shack on e-bay (it's the…
... problem was a faulty RF signal, so I bought a SCART ... sound in with the RF signal so I don't think ... -
Video generation using a CPUWe know it is possible to generate a video signal using a CPU, and this technique was often used on low-end computers in the early 1980's (for exampl…
... possible to generate a video signal using a CPU, and this ... -
Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…
... input) and instead connect this signal via a new capacitor between ... RF TV connection, but the signal is not pointlessly present on ... colour picture from the composite signal.
Change R38 to ... -
Spectrum +3 to Joytech PS2 8" LcdHi, I?m making some cables so I can connect my old computers to a Joytech PS2 8" Lcd. Starting with my Spectrum +3 I made a RGB and a composite cab…
... a Spectrum 48K by composite signal and the image it?s ... different between the 48k video signal and the +2 and +3 ... -
Routers...I'd be grateful for any advice anyone can offer with regard to the following. I have a BT home hub 3 in my living room which is connected two a cat6 …
... to boost the WI-FI signal in that part of the ... -
FS: Phillips 80 Green Screen MonitorHad this in a lot, accepts a composite signal (tried it with a modded 48k) and works just fine, would probably work with most things that output comp…
... a lot, accepts a composite signal (tried it with a modded ...
