[sebhc] H-89 bus pin out Help
bandit1921 at cox.net
Tue Mar 14 12:42:06 CST 2006
Depends on what you are looking at, I took those from the CPU
Board,because looking at the H17 and Serial I/O used 2 different
names,pins are different.
At 10:24 AM 3/14/2006 -0800, you wrote:
> I don't think the pins you've labled are correct. As I recall
>only A0, A1, A2 and maybe A3 were on the I/O buss.
>The mother board decoded a number of blocks to the I/O
>boards on some of the other pins. I don't think the
>entire address were there through A12. Pin11 is the
>select line for the floppy block of I/O.
> Also, I think pin 6 is BRD_L and 7 is BWR_L not address
>lines. Pin 13 is the clock line ( 2.048MHZ ).
> >From: "Joe Smith" <bandit1921 at cox.net>
> >Here is a little text file from what I see on my Schematic, if you
> >look at the H17 Floppy connectors and the serial I/O connectors it
> >says different things,this is a combo of those and what it shows for
> >them on the CPU board.
> >At 04:53 PM 3/14/2006 +0000, you wrote:
> >>Bill Malcolm wrote:
> >>>Hi: All I did not see the H-89 BUS Pin out in the archive files (
> >>>for the slot card).
> >>The schematic for the floppy controller only identifies the pins
> >>that it uses, but it might be enough.
> >>It doesn't look like we have the schematic pull-outs for the H88/89
> >>manuals in there yet. I'll keep an eye out for some during my cleanup.
> >>-- Steven
> >>Delivered by the SEBHC Mailing List
> >Joe Smith
> >Conbuilder debugger /Programmer
>Delivered by the SEBHC Mailing List
Conbuilder debugger /Programmer
Delivered by the SEBHC Mailing List
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