Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!security!genrad!grkermit!masscomp!clyde!floyd!harpo!seismo!hao!hplabs!sri-unix!HUNEYCUTT@gunter-adam From: HUNEYCUTT%gunter-adam@sri-unix.UUCP Newsgroups: net.micro.cpm Subject: Z-100/IEEE-696 (S-100) Message-ID: <16108@sri-arpa.UUCP> Date: Sat, 28-Jan-84 15:12:00 EST Article-I.D.: sri-arpa.16108 Posted: Sat Jan 28 15:12:00 1984 Date-Received: Thu, 2-Feb-84 00:59:48 EST Lines: 25 From: DougThe S-100 bus in the Z-100 is indeed IEEE-696 engineered. The system supports 5 slots, one of which is taken by the floppy disk controller, another by the Winchester controller (if you have one). You can plop any IEEE-696 card into the machine, with one noteable exception....(sigh) You see, even the motherboard of the Z-100 is broken into logical parts. The memory circuitry is a 'logical' S-100 card, the video circuitry another, and so on. Accordig to the designer, you could DMA video pictures into the display memory if you have a DMA device driver (which the floppy controller is NOT) PROBLE: The CPU circuitry is configured as an IEEE-696 PERMANENT MASTER!! This precludes the addition of a standard S-100 CPU card, as it will also want to be a permanent master. The Zenith folks are thinking about it. (Note: for those of you with a Z-100 already, look at the back. There is a very long cut-out at the top (about the length of a standard S-100 card). Yup, they actually thought about extending the S-100 outside the main box. Just think what your RFI sources could do with that!!) Doug -------