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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…
... I've seen have dodgy M1 lines.[/QUOTE]
That is ... (and perhaps about how easy /M1 line is damaged in Sinclair ... , Sharp), and whenever I used /M1 signal in a circuit, that worked ... few cases where I used /M1 signal, it was needed otherwise I ... -
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…
... (and perhaps about how easy /M1 line is damaged in Sinclair ... , Sharp), and whenever I used /M1 signal in a circuit, that worked ... few cases where I used /M1 signal, it was needed otherwise I ... said a "dodgy" M1 line, not a "broken" M1 line.
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…
... thing as a "dodgy M1 line", they either work ... M1 is internally disconnected in the Z80, and any signal ... 't even resemble a valid M1 signal).
If a ... (which requires a working M1) but doesn't work ... it's loading the M1 line by marginally too much ...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…
... fix, it must be the M1 signal of the Z80 that fails ... , or another Z80 signal problem, which both will result ...Altera CPLD vs Xylinx FPGAI will dig into the world of FPGA's, mainly to find something that can replace one or more GALs for my current and new projects. And it's never bad t…
... // Z80 RD signal
input m1, // Z80 M1 signal (may not be ... .clk(clk), // 50Hz (INT) signal
.enautofire(enautofire), // the ... /> .firein(fire), // fire signal from joystick
.fireout( ...Altera CPLD vs Xylinx FPGAI will dig into the world of FPGA's, mainly to find something that can replace one or more GALs for my current and new projects. And it's never bad t…
... document also states that M1 should be included in ...
Better is ignore M1 signal for all decoders of I ... absolutly not need this signal and some ZX models ... I/O decoder with M1 absolutly unusable. For ... this Z80CPU clone not use M1 signal:
[url]http ...Configuration of FPGA coresHi all! Lately a lot of features have been added to the V6Z80p Spectrum core. Most of them are handled (clearly) using ports. Some examples: ULA+, Ti…
... into account the M1 signal and the RFSH signal[/B]. [/quote]< ... br />
We have just discussed that adding M1 ... Spectrum with a faulty M1 line, if that device ... doesn't really need the M1 line (i.e. ... goes for the RFSH signal. It's of no ...Fastest Z80?Hi , Could somebody explain more about the Kawasaki Z80 33 MHz to me? Is it fully backwards binary compatible with older Z80s and could it be used a…
This CPU not use M1 signal, then not work with some interfaces as DIVIDE/DIVIDE PLUS/D40/D80/INTERFACE 1/etc...
CPU timing is incompatible (faster) than original CPU Z80 and software can run faster and multicolors/samples will incorrect....Fully-addressed devices initiative (FADI)I would like to introduce an initiative for those who create new pieces of hardware containing legacy devices with well-known addresses. It says that…
... and take into account the M1 signal and the RFSH ...Fully-addressed devices initiative (FADI)I would like to introduce an initiative for those who create new pieces of hardware containing legacy devices with well-known addresses. It says that…
... or 16 addressing bits and /M1 signal should be decoded. For example ... detect A0 to A7 and /M1 signals (and /IORQ, of course ... to A15, and /IORQ and /M1 signals.
I call ...Z80 compat listAfter the chat I had with a person on my facebook group about which Z80 chips work with the DivIDE device I found that there was no list at all to le…
... ) Z80's have a damaged /M1 output (either off-factory or ... users), some peripherals use the /M1 signal, so there is a problem ...DivMMC EnJOY!Coming up... [IMG]http://benophetinternet.nl/hobby/vanmezelf/DivMMC_enjoy_first_render.jpg[/IMG]
... ? sometimes the problem is the M1 signal from z80, and as the ... /> anyway with a wrong clock signal you can always see the ...DivIDE black editions availableI have about 6 more DivIDE black editions ready, and will finish more this week. [B]DivIDE 57c BLACK edition including ESXDOS 0.8.5 and 1GB CF card[…
... a PAL line and the /M1 signal, so it might be a ...New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…
... a problem with the clock signal getting reflected when it reaches ... put the unamplified inverted clock signal on the edge connector, rather ... much better and amplified clock signal after it's been through ... exactly the same as the M1 signal being bad - it'll start ...IF1bis StabilityI just thought I would start a different thread relating to the IF1bis, and leave the copyrighters to it elsewhere...:-P I've had mine for a few mon…
... impedance. See Spectrum reset signal. Needs buffering to work ... br />
- RESET signal? The Spectrum?s /RESET is ... .
[QUOTE]- Signal integrity issues. See the recent ...
- CLK signal? What CLK signal? What /M1 signal?, for that matter.
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... sometimes the problem with the M1 signal and even a new CPU ... have a problem with that signal)
Ingo ...Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... sometimes the problem with the M1 signal and even a new CPU ... have a problem with that signal)
Ingo.[/QUOTE]
Bingo! Not a bad m1 line but a different type ... the z80 to test the M1 line but I've used ...Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... sometimes the problem with the M1 signal and even a new CPU ... have a problem with that signal)
Ingo.[/QUOTE]
DIVMMC my version512 ram, 8kb Flash ROM, esx dos, 2x thru, micro SD card slot,prototype board: [URL=http://www.fotosik.pl/showFullSize.php?id=18408198292851f7][IMG]h…
... have stated that the clock signal may be erratic - I ... ordinary square wave like digital signal! Lower trace is output from ... Spectrums probably have better clock signal and not need the extra ... found 2 units with bad /M1 signal.
So, thanks again ...New version (v0.31) of ZX DiagnosticsHi all,<br><br>Just wanted to let people know that I've released a new version of the Spectrum Diagnostics into the wild.<br><br>These were originall…
... ? It doesn't use the /M1 signal, can run on a host ...Opus Discovery not WorkingHello hope you can help, or if this thread goes well that you also find the answers you are looking for... I have an Opus discovery that does not …
The M1 signal is not available on the ... Floppy Disk Controller uses the signal when accessing disks)
Often ...Opus Discovery not WorkingHello hope you can help, or if this thread goes well that you also find the answers you are looking for... I have an Opus discovery that does not …
... />
[quote="roko;938314"]The M1 signal is not available on the ... Floppy Disk Controller uses the signal when accessing disks)
Often ... am not actually using the M1 hardware, but loading a program ... with a Multiface with the M1 mod . Is does not ...What Has Happened to My Multiface 128s?These Multiface 128s have been store away for at least 20 years and when last used they were both working properly . So today I decided to try them o…
... . Compatibility issues aside, a low M1 signal or if it's missing ...Microdrive units with weak (not dead) ULAs...Hi everybody, I've got a Microdrive unit here. It didn't work. It does now (actually, it was the ribbon had broken and the ground had lost contact, …
... on pin 1A (the data signal) and on the bad unit ... I believe that's the signal before going into the ULA ... 's the output that's weak.
Looking at the ...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…
... , also, the MREQ and M1 transistors on the DivIDE are ... rise time of the signal on the other end ... the Z80 is a bit weak when outputting logic 1, ... which will slow input signal rise/fall times because ... propagation time of the signal through the single inverter ...Recapping your SpeccyHas anyone ever done it? I have several vintage amps, tuners, cassette decks that have been recapped. So just wondering are there many on WOS who ha…
... a Z80 with missing or weak M1 ever was produced, and even ... as IF1 depends on that signal....
But indeed the very ... I have seen) a missing M1. This stock could originate from ...Recapping your SpeccyHas anyone ever done it? I have several vintage amps, tuners, cassette decks that have been recapped. So just wondering are there many on WOS who ha…
... a Z80 with missing or weak M1 ever was produced, and even ... as IF1 depends on that signal....
But indeed the ... I have seen) a missing M1. This stock could originate from ... who knows....
Maybe the M1 line wasn't in the ... with having a faulty M1 line?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…
... under the impression that the M1 line from some batches of ... Z80 CPU were simply too weak a signal?
I found ...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…
If there is a weak signal from the M1 pin, it should be possible ...M1 LOADING between TZXs ?Splat! (Alternative) from TZX Vault is a M1 LOADING snapshot file. Is this a mistake, or is there some reason for this ? Best wishes, Cristi
Splat! (Alternative) from TZX Vault is a M1 LOADING snapshot file.
Is this a mistake, or is there some reason for this ?
Best wishes,
Cristi
