home *** CD-ROM | disk | FTP | other *** search
- (Since the first post of this article, doesn't seem to have shoved up yet,
- sort of. I'm trying again, sorry if more than one shows up).
-
- 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, Amiga Tech should answer, but... :)
-
- ---
- Ola Lidholm
- olal@plea.se
- ola_lidholm@augs.se
- ola lidholm@2:204/204.25
- http://www.plea.se/~olal
-
-