From Ralf Kiefer@21:1/5 to All on Sun Oct 9 23:02:07 2016
actually I'm configuring a system running a MVME147 from 1988 with 8MB
local DRAM and OS-9 V3.0.2. Nearly 20 years ago I run this machine but
with no slave cards which uses A24/D16. Now I try to find the right
address space. The manual tells me that A24/D16 is located between the
end of local RAM (here: 8MB) and 16MB, means from $0080.0000 to
$00ff.ffff. It's unusual because MVME147s were also equipped with 16MB
or 32MB. In these cases there won't be any A24/D16 space.
I read Microware's Board Support Reference Manual, the VME/OS-9
Installation Manual, Motorolas hardware manual of the board and the
manual which describes the VMEbus chip. No more success :-(
Is there no other chance, i.e.
Radstone PME68-32 $fexx.xxxx
Eltec E6 $ffxx.xxxx
Locating external DRAM boards from $0100.0000 looks a bit strange. I
know that there's no problem for OS-9 to deal with wholes in RAM address
space. But it looks a bit unusual.
Is there anybody who runs a MVME147 machine running slave cards with
just A24/D16? I'd like to know the port address of any descriptor (at