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Zymosis -- WTFPL'ed Z80 Emulation Corebreaking news! i'm back with another useless project: new Z80 emulation core written in pure C! i hear you screaming: "oh, no! WHY?!" let me tell yo…
... pretty sure that 128k has 'even m1', but libspectrum (and the actual ... -
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 -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... V flag is reset, even if interrupts were enabled beforehand ... 0x0038:
* M1: 7 tstates: acknowledge the interrupt ... routine:
* M1: 7 tstates: acknowledge interrupt and ... cycles:
* M1: 6 tstates: acknowledge interrupt.
History Channel documentary doesn't even mention the SpectrumI recently saw this documentary about the history of computers and it didn't even mention the Spectrum. Was it really irrelevant when it comes down t…
... computers and it didn't even mention the Spectrum. Was it ...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 ...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 ... mean the ZTX650 is not even noticibly warm when its working ...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 ...games you persevered with, even tho' they were cr*pI remember spending ages on 'Metal Drone' ([url]http://www.worldofspectrum.org/infoseekid.cgi?id=0003143)[/url], and to be honest it's not a great g…
I remember spending ages on 'Metal Drone' ([url]http://www.worldofspectrum.org/infoseekid.cgi?id=0003143)[/url],
and to be honest it's not a great game at all... I don't even know why I tried so hard with it...Faulty M1 pin on a Z80 made from SGS?It's the second time I have come across this: a Spectrum that seems to work ok, but if I attach an Interface 1 or a DivIDE to it, it behaves as is no…
... Interface 1 and DivIDE use M1 signal as input (among others ... I have looked at the M1 signal using a scope, the ... , didn't SGS implement the M1 pin on their Z80's ...Games you own but haven't even started yetGo on then. What do you own but you haven't even started, even though the intention is there, but the time never seems to come around or you already…
... own but you haven't even started, even though the intention is ...Problem loading Warajevo tapes even if they are converted to TZXDear readers, Yesterday I experimented with some of my older Warajevo tapes (which are known as being completely different from Lunter tapes) that c…
... TZX files. Worked well.
Even the direct recording blocks are ... emulators won't load them, even if I disabled edge protections ... the original Warajevo tapes, but even in normal 48k emulation I ...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…
Did the average Spectrum programmer really even try?I've been thinking about this recently, I'm always hearing Amstrad, and MSX users moaning about how unfair it was that they got "lazy Spectrum ports"…
... Spectrum programmers [I]really[/I] even try to make the best ... for one load or something? even then I'd much prefer ... /> and Karnov in 1988 (or even somewhat Stop the Express in ...I didn't even get a job interview.I have been at the Citizens Advice Bureau for 2 years now. I'm one of the most experienced assessors (that's a fairly new role) there, and out of tho…
... it.
I've even pushed myself on to the ... form.
Did they even read my application? Because they ...Now even Sega have been hacked[COLOR="Blue"][B][SIZE="5"]"Sega says hackers stole data of 1.29 million users[/SIZE][/B] Sega has confirmed that the personal data of 1.29 million …
... />
I didn't even know Sega had records of ...Jobs You aren't even Qualified forAnyone been given a job for which they're not qualified for? My wife's school get me to teach IT classes when their regular teacher is off sick and …
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 ... .
I appreciate that, even though I am not looking ...+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…
... so I replace C13 and even shorted the resistors to ensure ... devices.
I have even changed the adapter and CPU ... at straws and suspect the M1 line on the motherboard is ... me to believe its an M1 fault is that the ... a state lock on the M1 how would I go ...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?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 …
... />
But the bad M1 problem that seems to occur ... and low) by the M1 output could be measured relative ... ://photo.alioth.net/Scope/M1-dc-coupled.png[/img ... in time with where M1 should actually move, but ... ://photo.alioth.net/Scope/M1-with-spectranet.png[/img]< ...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…
... -known addresses. It says that even such devices should be fully ... or 16 addressing bits and /M1 signal should be decoded. For ... detect A0 to A7 and /M1 signals (and /IORQ, of course ... to A15, and /IORQ and /M1 signals.
I call ...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…
... 2 Z80, thinking of a M1 line default (but it was ... are in (almost) working order, even if I never use them ...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…
... . It does not even have the classic faulty M1 line.
even if everything checks out OK ...harvard architecture spectrum clone.I got my first +2 before christmas. I'd never given the 128k spectrums much thought, always been a 48k rubber key tradionalist. :smile: I've been me…
... in with a read and M1 signal plus other logic for ... but not classed as a M1 cycle, (need to look in ... and reads that are not M1 cycles. display file would be ... major problems I haven't even considered).
pros I ...Using even ports for input?I've been looking for unused ports to use with my clashbasher interface. I understand that the spectrum only considers A0 when decoding its input p…
... loading from tape so any even port is considered a read ... loop. It still works fine even with a game tape playing ... any reason not to use even ports in this way? It ...Issue 4S differencesI decided to buy an Issue 4S PCB after reading much about them on here. It was originally in a plus case which didn't come in the sale. I've been run…
... single wire mod stresses it even further. Any difference in performance ... read this might be because M1 isn't implemented properly on ...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!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 ...
