21 Feb
2015
21 Feb
'15
5:53 a.m.
On Feb 21, 2015, at 3:56 AM, Johannes Thelen
<johannesthelen at hotmail.com> wrote:
Mystery have solved!
I traced down receive & transmit pins from RJ45 and scoped little bit. I found one
pin bursting 9600baud data couple seconds intervals and I connected this to terminal.
Here's result at start up:
https://drive.google.com/file/d/0B_DR111cK6W-LTZqeWt2QzlRRU0/view?usp=shari…
*************************************************'
SCSI INTERFACE FOR HP-1000. GRUMMAN 1995.
Module: START; Version: 5.60
Test Group 1: EPROM CHECKSUM TEST - PASSED
Test Group 2: GLUE LOGIC TEST - Test #5 - PASSED
Test Group 3: RAM ADDRESSING TEST - Test #5 - PASSED
Test Group 4: SCSI CONTROLLER TEST - Test #8 - PASSED
Test Group 5: RAM DATA RETENTION TEST - Test #2 - PASSED
Test Group 6: WINCHESTER (FIXED) DISK TEST
Device init routine - ** FAILED **
NCR register: 21 Expected data: 01 Actual data: 00
*************************************************************
So Grumman made this board. Chip dates was right, very late design for this old computer.
Pretty cool!
For years Grumman made it its business to buy up older computer lines that
had some small amount of life in them and support them for as long as it could
extract support contract payment out of the users. Without doing any development
work at all, with only very limited bug fixes (at least that?s my experience with
Solbourne). The timeframe is about right.
Warner
****************************************************
Thanks for tips! I have lost couple hours those sites before. I probably make some own
high speed downloader boot ROM / hardware / PC soft just for fun, but I have to test those
too.
This is topic of its own, but do anyone know any 21MX assembler and microassembler for
DOS/Windows? Or have I make one..? I have little (demoscene) project going on for this
21MX. Same project includes IBM 1800, hopefully... Later more this totally insane project,
but I guarantee no old computer is harmed on that performance ;D
Thank you all!
- Johannes ThelenFinland
Before microcomputers blog (Finnish) http://ennenmikrotietokoneita.blogspot.fi/
If you
did find one of those then you could use the HPDrive software
on a PC with a GPIB interface to emulate a CS/80 drive.
http://www.hp9845.net/9845/projects/hpdrive/
> That is CS/80, not C580. You would need to find an 12821A HP-IB>>Interface to
use that.>>http://www.hpmuseum.net/display_item.php?hw=486>>If you did find
one of those then you could use the HPDrive software>>on a PC with a GPIB interface
to emulate a CS/80 drive.>>http://www.hp9845.net/9845/projects/hpdrive/ From: jdbryan at acm.org
To: cctech at classiccmp.org
Date: Fri, 20 Feb 2015 13:25:53 -0500
Subject: Re: HP 21MX Ethernet/SCSI card?
On Friday, February 20, 2015 at 9:09, Glen Slick wrote:
If you did find one of those then you could use
the HPDrive software
on a PC with a GPIB interface to emulate a CS/80 drive.
http://www.hp9845.net/9845/projects/hpdrive/
Johannes: you could also use HPDrive to emulate a 7970 9-track tape drive
or 9144A cartridge tape drive, so you wouldn't need to write your own
emulator. Your CS/80 boot ROM should be able to read the first block of
the 9144A tape image into memory, although the code read in must be
arranged in a certain way. Let me know if you want the details.
-- Dave