18 Jun
2003
18 Jun
'03
3:41 a.m.
--- Hans Franke <Hans.Franke(a)mch20.sbs.de> wrote:
Well... it certainly was for the PC, XT and AT. By the time the
CPUs went to a 32-bit data bus, the ISA bus was, in effect, emulated.
In my opinion the LC 475 and Performa 630 are the best
coices for
a classic (68k) Mac. Both hafe the 32 Bit PDS slot, where you may
find network cards or even video cards. Beside that you may with
low effort design your own cards, since the PDS is nothing else
than a 68k bus, ment for machine specific add ons.
My personal favorite is the SE/30, but I like the compact Mac
format and the built-in monitor. If you need color, then I'd
agree about the two models you mentioned.
The Mac
approach is something like the Amiga approach - give little
boxes a proprietary processor-specific slot
Now, let's get setious, isn't the ISA bus exactly the same?
A Processor specific bus for an 8088 system (and an extension
to 16 Bit for the AT) ? Basicly you'll have a 16 Bit and a 32 Bit PDS
Version. Way
like the XT/AT thing for PCs.
I'll admit to that being basically true, but when you are trying to
fit card "A" into Mac "B", how many varieties of PDS slot are there?
I don't know the exact answer, but I have handled at least three
kinds of cards (SE (16-bit), SE/30+IIsi (32-bit) and LC (32-bit).
-ethan