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s-video SuccessHaving tried the various composite video fixes for the +3 etc, I was left feeling a little cold at the results, and was about to give up my quest for…
... resistor R34. (the signal at the Peritel is to weak)
Ground ... also allows for a composite signal, just in case you want ... -
Crappy composite/TV signal on grey +2 machineI got a grey +2 machine from eBay a couple of days ago. It's working fine, but both the TV signal and the composite signal taken from the monitor con…
... both the TV signal and the composite signal taken from the monitor ... -
My speccy is ill :(Hi all, this is my first post and all so go easy on me ;) I've got a +2 (gray case) speccy which had a really poor tapedeck, basicaly on any tape, t…
... on any tape, the signal was so weak and noisy that i ... -
Composite Signal from Spectrum 48k Hi, Just a quick question for you all. I have a nice new LCD Monitor which has Scart. composite and S-Video inputs on it and I'm using some of my …
... on it via a composite signal. I know you can modify ... 48k and get a composite signal from the RF modulator but ... you can get a composite signal from the edge connector and ... to the fact that the signal from the edge connector isn ... -
Sound mod for AY audio chipsHi again. This is a repost. I posted it in the misc forum a while back but it definitely should be in here. I was totally pissed off with the crap…
... audio chip. It amplifies the weak signal coming from AY chip upto ... -
128k dead, no TV signalI got 128k spectrum (heatsink model) from a friend of mine. He told me that speccy is dead, and he doesn't know what's wrong with it. When I plugged…
... . On TV there is no signal of any kind. Almost there ... ). If there is no TV signal from speccy I assumed that ... -
Loadf from mic!Hi, i have discussed this in the emulators section which it obviously does not belong. Here is my problem... I got a Spectrum+ to remind me of my you…
... ) was giving me a very weak signal...
I amplified the wav ... I tried again.
The signal was OK but the games ... loader to work although the signal 'sounded' OK.
In my ... -
Speccy Tunning ProblemHi all, I've just acquired a 1982 series 2 Spectrum 48K boxed in mint condition the only thing missing is the demo tape. Anyway tried to tune it in …
... only to find a very weak signal which displayed a series of ... -
Faulty M1 linesI'm sure this has been discussed before, but using the forum search for the word 'M1' pulled back no hits, which surprised the hell out of me. Anywa…
... forum search for the word 'M1' pulled back no hits, ... which Z80s had the faulty M1 lines, and what was the ... stick my scope on the M1 line this weekend, but ... looking for timing issues with M1 (for the '138 to ... decode the OUT port address, M1 must be high, WR ... -
A vexatious questionThis is kind of a follow-up to a question about RST #8 and hardware that I wrote in the development forum a while ago. To summarize that: certain ha…
... hits 0x0008 (i.e. an M1 cycle with 0x0008 on the ... of ROMCS before nailing the signal high and paging in their ... -
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 …
... that it's a faulty M1 line. Is there any way ... -
Wireless Router ProblemI have a DLink DSL-2640B an all in one DSL Broadband Modem and Wireless Router. However,the signal that is puts out is a weak as American lager. I…
... /> However,the signal that is puts out is a weak as American ... it cannot even get a signal from the lounge downstairs to ... can only get a very weak signal that keeps on droping upstairs ... extender really). That gets a signal to my upstairs even distant ... -
Huawei E220 modemI doubt that I'm the only [strike]twit[/strike] SpecChum using one of these. I've [url=http://en.wikipedia.org/wiki/Huawei_E220]just read[/url] that…
... today when the chuntey is weak, it's a bit like ... booster antenna and an adapter, signal strength can be considerably improved ... -
A question about M1 cyclesI'm writing an interrupt routine that, after the usual register pushes, will jump to a location of my choice with a [b]JP (IY)[/b] instruction. If I…
RGB SCART Not Working on ZX 128K (heatsink)I've just received a SCART RGB to HDMI converter and it is not working with my ZX 128K (heatsink). I do have the correct 128K SCART cable (which is d…
... SCART problems, maybe the signal is too weak? How could I measure ... signals or correct levels of signal?
Unfortunately I do ... : To add: The RF video signal on the 128K machine is ...Help me understand ZX RGB signal (long)This will be a long post so please bear with me and most importantly help me. I have a 128K+ and +2A that I'm trying to get working with my 15kHz RG…
... to supposedly provide RGB SCART signal - these cables are from ... rgbcgatovgac.html[/url]
Signal Requirements:
RGB: 0.7Vpp ... when SCART devices display composite signal, but not when using ... maybe the final SCART signal levels are different between ...ZX80 and 81 hardware questionsI'm finding a lot of the documentation that is ostensibly about the hardware of the ZX80 and 81 to be primarily about the software. I was hoping some…
... that's relatively clear: when M1 and A15 are active, the ... to know.
The M1+A15 test triggers a load ... a ROM read.
M1 + IOREQ active (ie, interrupt acknowledge ... +READ sets the vertical sync signal as active. IOREQ+WRITE sets ...RF signal now analogue has goneAnyone tried tuning in their speccies now the analogue signal has gone? Has it improved?
Anyone tried tuning in their speccies now the analogue signal has gone? Has it improved?Weak/no signal on internal simple 8-bit ide interface.Hi all, I'm trying to get one of Zetro's 8bit ide interfaces working using a CF adaptor and the +3e roms on my +2B. The interface board appears to b…
Hi all,
I'm trying to get one of Zetro's 8bit ide interfaces working using a CF adaptor and the +3e roms on my +2B. The interface board appears to be working just fine - but I think my Z80 (one of the ST ones) is maybe not up to the job.
...Known Z80 M1 problems?I got an email yesterday from someone asking for a Z80 without the M1 problem. I only know about the fanout problem that many Z80's are suffering of…
... for a Z80 without the M1 problem.
I only ... att all.
This M1 problem is new to me ... a Z80 which has this M1 problem maybe?Internal amp and signal cleaner for tape inHello! Is there known to work INTERNAL schematic which cleans signal from tape in and amplifies it. I need such thing so i can load from my smartpho…
... work INTERNAL schematic which cleans signal from tape in and amplifies ...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 ... because of defective M1 line
- Bad PCB's ...Bad signal on my ZX Spectrum+ 48kHi there... I just got my very first Spectrum, after search high and low for quiet some time :) But unfortunately, when I plug it in my tv, I don't …
... , I don't get any signal, no image... On one of ...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 …
... 4 I managed to get weak loading bars (not enough to ... 1 for signal and 2 for ground. This again gives weak loading ...+2A - stuck on test signalHi, new member here, hope it's OK to ask for help... I recently rescued my old +2A from my parents' loft. When I tried to test it out, I've found th…
... menu, it shows the test signal (colour bars with "1987" in ... - it seems that the test signal should only appear if the ... only get to the test signal colour bars and beeps.
Spectrum +2(grey) rf problem not tuning inHi lads, first of all a quick intro. Im a speccy enthusiast in Ireland, had my first speccy when i was seven in 1987(grey +2). Eventually it got repl…
... lock on to a clear signal. My theory is that the ... unit isnt emitting a strong signal? Has anyone had this problem ... . I just hope that the weak rf output is seperate to ... ll give a strong enough signal.
Any experiences? It ...ZX Spectrum clock signals comparedI haven't searched for this on WoS; it might have been posted before. But I think it's important info, and can't do any harm to repeat or show from a…
... with the ZX Spectrum clock signal.
With the original design ... +2 which processes the clock signal, very likely to improve that ... the signal that comes from the ULA is even more weak than ... /> This gives a perfect clock signal by default:
[IMG ...ZX Spectrum 48k - no CLK signalHello I'm trying to repair ZX Spectrum 48 mainboard issue 3B. When i check signal with oscilloscope on X1 or on ULA pin 39. I get stable 2V no clock…
... 3B.
When i check signal with oscilloscope on X1 or ... the cause of no clock signal?
regards
MaciekInteresting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…
... up and running again. The M1 line was still also functioning ... provoked by a spurious IO signal from the Z80.
3 ...Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…
... use to view a composite signal.
Under settings menu there ... ; SECAM, etc..
Composite video signal is analog, correct?
Mainly ... like to see the comp. signal itself and any interference/noise ... may be present in the signal.
And when ...
