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- Path: newsfeed.tip.net!usenet
- From: olal@plea.se (Ola Lidholm)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Zorro (Dave Haynie please?)
- Date: 6 Mar 1996 18:54:09 GMT
- Organization: Uniplus Internet Access
- Message-ID: <1315.6639T1189T873@plea.se>
- NNTP-Posting-Host: beatles.plea.se
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP) *UNREGISTERED*
-
- (Phey, just seems I can't post anything, sorry folks if more than one of
- this shows up, but...)
-
- Hi!
-
- I am currently writing a series of articles about the Zorro busses in one
- of the new swedish Amiga Magazines: "Svenska Amiga Magasin".
-
- I have a question about the "DOE" signal in the bus, in "A500/A2000
- technical reference manual" it says that this signal is ment to be used
- to enable the buffers on the expansionsion board (PIC), and also it says
- that the timing on this signal changes if the buscycle is a read or write
- cycle. The "RKRM: Hardware" does not give me any more clues either.
-
- So what I'm wondering is, are there any timing diagrams available where
- you can see exactly how the timg changes, or an exaple as to how you
- actually should use this signal. In the "PIC example" also published in
- the above mentioned book, the signal isn't used at all; it is simply
- stated that that pin (#93) is "reserved".
-
- I have also heard about a Zorro-III example design "BigRam", that was
- available to developers before commodore whent bancrupt. Is this anything
- that would be available for the public, or do you have to be a registered
- developer?
-
- (This last one is for Amiga Tech. anyway, but...)
-
- ---
- Ola Lidholm
- olal@plea.se
- ola_lidholm@augs.se
- ola lidholm@2:204/204.25
- http://www.plea.se/~olal
-
-