Z80 compat list
After 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 let others know about which worked and which didn't. This I feel is needed and it would benefit the Zx Spectrum community
If you can let me know the details of your Z80 chip be it you have never tried it on a DivIDE device or you have I would be most greatfull.
All I want you to do is to write down everything thats printed on the chip and I can fill out a list. The list at the moment is in the link at the bottom of this post, but I am thinking about putting up a website for it.
https://www.dropbox.com/s/z8p1iqlbof7y7nx/Z80%20compat%20list.odt
thanks for your time
If you can let me know the details of your Z80 chip be it you have never tried it on a DivIDE device or you have I would be most greatfull.
All I want you to do is to write down everything thats printed on the chip and I can fill out a list. The list at the moment is in the link at the bottom of this post, but I am thinking about putting up a website for it.
https://www.dropbox.com/s/z8p1iqlbof7y7nx/Z80%20compat%20list.odt
thanks for your time
Post edited by morcar on
Comments
IMHO there are only 2 kinds of IC's: those that work according to their specifications, and those that don't (as in: broken - in whatever way that makes them deviate from manufacturer's specs).
In this particular case: I've read that some (NMOS) Z80's have a damaged /M1 output (either off-factory or damaged by users), some peripherals use the /M1 signal, so there is a problem if you use such a peripheral with such a damaged Z80 chip.
And that some Z80's have a somewhat lower drive strength on their outputs compared with Z80's from other manufacturers. Which can cause trouble when many/large peripherals are connected, especially with machines that have many chips on some Z80 signals (I'm talking the 128K toastrack here :grin: ).
Not sure what's going on with the DivIDE, but it doesn't matter: In the 1st example it's a simple case of a broken vs. working Z80 chip (NOT manufacturer / type number, even though that might be an indicator for the chance of a broken IC!). Fix: replace Z80 with a known good, or new specimen (new would be a CMOS part, if supplier isn't pulling from 20+ year old stock :-x ). In the 2nd case it's a matter of bad design of the machine (and/or too many peripherals attached).
Do you think they would ?
http://www.ebay.co.uk/itm/220744817915?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649