6 Sep
2014
6 Sep
'14
9:16 a.m.
Subject:
Further PDP-11/05 debugging -- core
memory faults
From:
Josh Dersch <derschjo at gmail.com>
Date:
9/5/2014 11:11 PM
To:
General Discussion: On-Topic and
Off-Topic Posts <cctalk at classiccmp.org>
Hi all --
The CPU in the 11/05 seems to be
behaving nicely as far as I can tell,
now that the Microcode ROMs are no
longer filled with bogus data. It
will run small programs I've toggled
in without issue, and so I've moved
on to testing the memory.
Josh, what do you end up doing to
recreate the ROMs?
Thanks,
John S.
6 Sep
6 Sep
12:50 p.m.
On 9/6/2014 10:16 AM, js at cimmeri.com wrote:
The contents are listed (in symbolic, not address order) in the
Engineering Drawings
(http://bitsavers.trailing-edge.com/pdf/dec/pdp11/1105/1105_RevAH_Engineerin…),
pages 53-58. I transcribed the ALU columns by hand into a text file,
then wrote a quick tool to convert from the text file into a properly
ordered binary that I then burned onto some NOS MMI 6300 PROMs using an
ancient Data I/O 29A programmer. (I found the PROMs on eBay for about
$4 each...)
It's *just* that simple :). If anyone's interested in the resultant
binaries, let me know.
- Josh
Subject:
Further PDP-11/05 debugging -- core memory faults
From:
Josh Dersch <derschjo at gmail.com>
Date:
9/5/2014 11:11 PM
To:
General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Hi all --
The CPU in the 11/05 seems to be behaving nicely as far as I can
tell, now that the Microcode ROMs are no longer filled with bogus
data. It will run small programs I've toggled in without issue, and
so I've moved on to testing the memory.
Josh, what do you end up doing to recreate the ROMs?
Thanks,
John S.
3591
days inactive
3591
days old
2 comments
3 participants
participants (3)
-
derschjo＠gmail.com -
js＠cimmeri.com -
roeapeterson＠gmail.com