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TK90X and expansionsHello all! Only to show my new setup: - a TK90X (Brazilian Speccy 48K clone) - Motherboard (a board that allow us to plug 3 devices on it - in the b…
... disk drive emulator
- a M1 disconnected
[IMG]http ... -
+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…
... at straws and suspect the M1 line on the motherboard is ... 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 ... -
Replacing ZTX650 with BD139Today I blew up one of the GALs on one of my DivIDEs while testing on my Toastrack. Shorted M1 with 12V and the 12V circuit broke. I had to replace T…
... on my Toastrack.
Shorted M1 with 12V and the 12V ... -
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 ... -
Help me resurrecting a 128KHello to everybody. I'm really struggling along a repair of a standard 128K a friend of mine handed me over some (ok, actually a lot of) time ago. A…
... second after reset, then stops. M1 does the same, sometimes stays ... -
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 ... -
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 ... -
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? -
Divide problemshave just got a divide 57c , green board.. not sure if t's actually working. 3 jumpers at the top near the NMI and a 4 pin jumper near the edge conn…
... 's the machines or an m1 problem as the divide+ works ... -
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 ... have by far the best M1 lines - loaded Target Renegade and ... ? Why do CPUs with borderline M1 lines not load 128K games ... -
128K Toastrack - bad Z80?My 128K Toastrack works fine, but if I try to use divIDE or M1/128 it does not work. divIDE does not show the boot screen and in both if I push the N…
My 128K Toastrack works fine, but if I try to use divIDE or M1/128 it does not work.
divIDE does not show the boot screen and in both if I push the NMI button, the Spectrum resets.
Is a bad Z80 CPU?
My soldering skills are so bad. :( -
car crash scammersthis infuriated me on the news just now [url]http://www.bbc.co.uk/news/uk-england-london-21473080[/url] 10 years for someone's life for fraud ? I'd…
... up after crashes on the motorway.. He's built like a ... -
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 ... detect A0 to A7 and /M1 signals (and /IORQ, of course ... to A15, and /IORQ and /M1 signals.
I call ... -
MultifaceOneCrack-Killer.tzxhi all just wondering if anyone has ever tried to use this tool? i have had a look at it and think i understand wot it's ment to do but the code loo…
... 2 code files from a m1 dump and it is meant ... -
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 ... -
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 ... -
Does a bad sequel/episode in a book/game/film/etc series kill the series for you?I meant to post this yesterday, but didn't get the time, but someone I was talking to said they used to love the Resident Evil series almost obsessiv…
... pointless, but I still like M1. The second Mr Bean film ... -
Hardware description - DivIDE interface[B][U]DIVIDE interface / DivIDE 2k11[/U][/B] [B][U]The main description[/U][/B] DIVIDE is IDE interface with own external memory. Thanks to very goo…
... and #562 then next after M1 cycle will connect DIVIDE memory ... -
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 ... -
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 ... -
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 ... -
tyre blow out ?no not the scottie + smash type incident that none of us can forget, that know about..lol car on the m25 today,on the way back from gatwick.. thankf…
... , but on a 4 lane motorway , which has another 2 lanes ... -
Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…
... lines !IOREQ and !RD (or !M1 for some reason instead) and ... -
Compact Flash Card In "Memory Mode" - (Help)Hello my fellow WoS'ers I have been developing a Z80 8bit interface with a compact flash card port based on Pera's ZXCF "memory mode" interface for …
Timex video mode & SamCoupe sound chip.Hi, people! I propose a solution which allows to use sound chip SamCoupe SAA1099 jointly with computers Timex 2048/2068. Everyone knows that these de…
... /> TimexConfigLoad=/A9 & A10 & /M1 + /IORQ + /(A0 & A1 & ... & A6 & A7 & /M1);
2) you must change ...Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
... of HALT, beyond the initial M1 cycle. The Z80 user manual ... states that M1 cycles are repeatedly executed, but ...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…
... read this might be because M1 isn't implemented properly on ...
