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128+ and Divide+ not working togetheri think theres something wrong with my 128 (toastrack), divide+ just wont work on it, corrupted screen on bootup and with big thick black bars rollin…
... edge connector is clean and M1 line is working. I tried stronger ... -
128+ and Divide+ not working togetheri think theres something wrong with my 128 (toastrack), divide+ just wont work on it, corrupted screen on bootup and with big thick black bars rollin…
... edge connector is clean and M1 line is working. I tried stronger ... -
Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…
... bet is its a bad M1 line on both our machines, and ... -
Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…
... bet is its a bad M1 line on both our machines, and ... -
Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…
... a Z80 with a bad M1 line it's just a case ... -
Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…
... a Z80 with a bad M1 line it's just a case ... way to test if the M1 is dodgy? Also, if I ... -
Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…
... way to test if the M1 is dodgy? Also, if I ... no way of testing the M1 line easily that I know of ... -
Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…
[QUOTE=rwap;489339]There is no way of testing the M1 line easily that I know of - I do however, have some Z80s which are known to work :-)[/QUOTE]
OK Rich, how much are they, in case I need to buy one? -
Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…
... consistent with Z80 and bad M1 line then?
Thankyou for ... -
DivIDE+ and the 48k SpeccyI've 3 48k speccies of various revisions and none of them are working with my DivIDE+ yet all my 128's do, yet I'm sure when I first had it I'm sure …
Dont know if this helps any but I had a 48 that wouldnt work with a multiface believe it or not, turned out it was the ULA (Thanks Rich!), isnt it usually the M1 line or something thats at fault in that situation? -
Spectranet updateOK, so I've not written an update here for a while...so here's a quick summary, the gory details are on the Spectranet news page on my wiki. * Hardw…
... for having bad Z80s. The M1 line doesn't work, so most ... .
With the faulty M1 line, anything that does automatic pageins ... because they watch for the M1 cycle (instruction fetch) at certain ... to say, with a faulty M1, the Spectranet won't work ... -
Spectranet updateOK, so I've not written an update here for a while...so here's a quick summary, the gory details are on the Spectranet news page on my wiki. * Hardw…
... determine the state of the M1 line in a Speccy? Is this ... correctly doesn't use the M1 line so wouldn't prove a ... -
Spectrum Serial Numbers Wanted!![b]This post updated Sept. 26, 2013[/b] As far as I know, the serial numbering system for the Spectrum has never been fully worked out. For the p…
Issue 3
Green writing
001-511113
ULA: 6C001E-6
Bad M1 line on non-socketed NEC ROM
UM1233 E36 Modulator -
DivIDE questionsHi All, I'm the proud owner of two DivIDE interfaces, that I have just "inherited" from a friend. One of them is the original one and the other one …
... suggest the lack of an M1 line on the Z80 chip in ... -
DivIDE questionsHi All, I'm the proud owner of two DivIDE interfaces, that I have just "inherited" from a friend. One of them is the original one and the other one …
... suggest the lack of an M1 line on the Z80 chip in ... -
The Royal Weddingthought I might as well.. as Mel likes em so much ;) Kate's sister scrubbed up well and Miles fav Elton was there :lol:
Spectrum 8bit IDE adaptersHello there my fellow WoS'ers Today I am pleased to (finally) release these little adapters into the wilde [URL="http://postimage.org/image/1aceto6…
... ]
[B]Bad (weak) M1 signal (pin 27 of Z80 ... may have a bad (weak) M1 line - this is quite rare but ... 1 CPU with a poor M1 signal... I went onto ebay ... CPU with a bad/weak M1 line wont work with a DivIDE ...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…
... /> not many can test the M1 line I guess (multiface etc) and ...Divide and Divide Plus issue'sHi, After about a year of inactivity I brought out my Spectrum +3 the other day and plugged in my Divide plus. The result was constant crashing on t…
... there is issue with CPU (m1 line), incorrect jumper setting on divIDE ...A misbehaving DivIDE 57c (Now repaired)Hello there my fellow WoS'ers Indeed it has been a while since my last post, please let me wish you all a (belated) Happy New Year, my this year bri…
... sounds for me like the M1 line of the Z80 in the ...A misbehaving DivIDE 57c (Now repaired)Hello there my fellow WoS'ers Indeed it has been a while since my last post, please let me wish you all a (belated) Happy New Year, my this year bri…
... sounds for me like the M1 line of the Z80 in the ... detected, and the detection takes M1 into account.
With ...Which kempston joystick schematic is the best?I'm looking for the best Kempston Joystick interface schematic. It has to be as cheap as possible. But it must be as compatible as possible. I've c…
... Ohm (data bus protector). And M1 line is often dead on old ... models, then you can disconnect M1 and detect only IORQ,RD ... place switch on board (accept M1 / ignore M1).48K's and bad DivIDE compatibilityI have had some 48K boards and complete machines in the past which didn't work fully with a DivIDE interface. The reason for that always was a Z80 pr…
... . This can't be Z80 M1 line.
If you are sure ...My divide killed my toastracknow it boots with garbage and z80 overheats a lot will replacing z80 solve it , or something else can be bad?
... install one with a missing m1 line,
then divide won ...My divide killed my toastracknow it boots with garbage and z80 overheats a lot will replacing z80 solve it , or something else can be bad?
... install one with a missing m1 line,
then divide won ... will find with a faulty M1 will be from another Spectrum ...Z80 not-wroking with divIDEHi mates. I have two questions, maybe somebody could know. I realize some ZX Spectrums don't work with divIDE due to specific Z80 chips. 1) if …
... of my heatsinks although the M1 line was good. After removing the ...Seems my DivIDE is not working.I recently received a DivIDE kit. Built it up, then tried it. I got a hung up Spectrum and I noticed that I had made a mistake. I swapped a LS245 wit…
... due to either a bad M1 line from the Z80 CPU or ...Seems my DivIDE is not working.I recently received a DivIDE kit. Built it up, then tried it. I got a hung up Spectrum and I noticed that I had made a mistake. I swapped a LS245 wit…
Probably the CPU is missing the M1 line on the output. Sinclair often used them, since that line is not used in the design and would not interfere with the regular functioning of a Spectrum.
