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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 of ... -
MISSING M1 LINE ON +48????I was posting questions about my DIVMMC enjoy not working on one of my +48`s and have now got round to testing if its cpu related.Trouble is the one …
... a little about the faulty m1 line and i think i understand ... -
Of course, when the M1 line of the Z80 CPU is failing, the Z80 CPU must be replaced![quote]Of course, when the M1 line of the Z80 CPU is failing, the Z80 CPU must be replaced![/quote] Err, why? If you are trying to use an interfa…
[quote]Of course, when the M1 line of the Z80 CPU is ... Z80 MPU with a working /M1 line, yes of course.
M1 line. So it’s irrelevant if ... -
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 ... stick my scope on the M1 line this weekend, but given ... looking for timing issues with M1 (for the '138 to ... exactly is the IORQGE line for on the edge connector ... -
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 …
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But the bad M1 problem that seems to occur ... probe connected directly to the M1 line on the Z80. The ... 0v than 5v (the M1 line is active low, so ... this reason the RESET line from the Spectrum is ... ://photo.alioth.net/Scope/M1-with-spectranet.png[/img]< ... -
Issue 4S bad M1Never ever seen a 4S with a bad M1 line before today [url=http://postimg.org/image/o2yrigdb1/][img]http://s14.postimg.org/o2yrigdb1/IMG_1291.jpg[/img…
Never ever seen a 4S with a bad M1 line before today
[url=http://postimg.org/image/o2yrigdb1/][img]http://s14.postimg.org/o2yrigdb1/IMG_1291.jpg[/img][/url]
But it is! -
Faulty M1 or no?Hi all, OK, so I've got an issue 4B which was pretty much untouched and appears to work fine (starts up OK, loads games, 23732 and 23733 both retu…
... I thought, "aha! a dodgy M1 line", so I removed the Z80 ... -
TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…
... /> Everything is working fine, the M1 line is OK (multiface128 is working ... -
Faulty Spectrum (help requested)I have an issue 6a specci. It's Z80 has the fault m1 line problem (Multiface 128 does not work). So I decided to put in a new Z80 but unfortunately i…
... 's Z80 has the fault m1 line problem (Multiface 128 does not ... there's no vertical red line pattern like upon normal startup ... -
DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... would say "its a faulty M1 line of the Z80" but the ... i had with a faulty M1 line a year ago.
So ... chance one of them having M1 faulty line.
The same Z80s ... -
Spectrum Ethernet updateWell for those of you who don't follow the news section on the project page, here's a quick update...and a request. Development has slowed a bit, si…
... Spectrum will need a working M1 line. You don't need any ... -
Two Odd Spectrum 128K FaultsI also have 2 Spectrum+128 machines with heatsinks. 1. Did not power up properly - I replaced the 7805 regulator and cleaned the edge connector and …
... is the lack of the M1 line on the Z80 or does ... -
Connecting a ZX Interface 1 to a +2AI have a customer with a Spectrum +2A computer - he has a working ZX Interface 1 and microdrive which has been tested with his +48 machine. However,…
... in case it is the M1 line, but does anyone have any ... -
Guide price for a 48k rubberkeys from you lot?My trusty Spectrum (an Issue 3, working since late 1983 or early 1984) has finally upped and carked on me :-( Now I could hit ebay or the local boot…
... 'd like one with the M1 line working so I could buy ... -
Faulty Multiface 1Hello... I have a MF1 that doesn't work. You press the red button and nothing happens... It is not my spectrum's M1 line because MF128 works fine on …
... is not my spectrum's M1 line because MF128 works fine on ... -
+3e Strange IssueHello there my fellow WoS'ers I am absolutely perplexed by the following problem, I am hoping that someone more enlightened than I can help [I](no…
... this to be a RESET line fault, so I replace C13 ... at straws and suspect the M1 line on the motherboard is kept ... me to believe its an M1 fault is that the DivIDE ... a state lock on the M1 how would I go about ... -
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…
... Z80's because of defective M1 line
- Bad PCB's or ... -
Replaced Z80 now a very dark screen!Today I dag out an old issue 3 that ive known for a long time has a faulty Z80 (M1 line) so I heat gunned it out, socketed it and replaced it with a …
... time has a faulty Z80 (M1 line) so I heat gunned it ... -
Z80 new old stockHi. I found this on eBay but ... is there a way we could know they don't hav a faulty M1 line? [url]http://www.ebay.com/itm/Zilog-Z80-CPU-Z0840004PS…
... don't hav a faulty M1 line?
[url]http://www ... -
Troubleshooting a DivIDE KitI am looking for suggestions to getting my DivIDE working. This has been rather problematic as I had an incredible red-faced, how could I be such an…
... 've read about the mysterious M1 line problem - but it is unclear ... -
Toastrack not recognising an IF1What the title says really, doesnt know its there, buffed the edge connector within an inch of its life but still no joy, also just now ive tried a M…
What the title says really, doesnt know its there, buffed the edge connector within an inch of its life but still no joy, also just now ive tried a MF128, all the nmi does is reset it. M1 line? -
Spectrum +2A/B - CPU affects loading??Hi everybody, Here's something I don't understand. A +2A came in the other day, and it was working fine, but wouldn't load some tapes. OK, thinks I…
... with one with an iffy M1 line (another Zilog, this time from ... have by far the best M1 lines - loaded Target Renegade and ... ? Why do CPUs with borderline M1 lines not load 128K games ... -
Project #1 : Speccy 128k+2 with diVide inside...Hi guys, I just have finished my Super Spectrum #1 The idea (I was thinking of that since 2007) was to fit an english grey +2 motherboard in a +2A…
... removing C31, and reconnecting the line between IC11 pin 4 and ... 2 Z80, thinking of a M1 line default (but it was working ... -
Residos with Task Manager crashes on NMI button pressI finally installed my DivIDE Plus which I actually bought about one and a half years ago. (I have way too little time for this project :cry: .) Ever…
... have Z80's with the M1 line missing? Or would in that ... -
Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…
... even have the classic faulty M1 line.
Still, the only ... -
Interesting 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 fine ... means the ULA's IOREQ line is only active when A0 ... -
+2b borkedwell not completely I get this when I hit the NMI on my multiface 3 (so that negates the use of my divides too), the yellow/green stripes flash [IM…
... 48) the z80 has good m1 line (came out of a working ... -
Replacing z80Hi all, I've just finished removing my z80 and installing it back in in a socket. Surprisingly I haven't broken anything in the process and the sp…
... suggestions point to a duff M1 line.
My question is ...
