28 May
2016
28 May
'16
4:42 p.m.
I wanted to reactivate a TI Professional Computer (TIPC) and all I get
some seconds after powering it on is the message
"** system error ** 0004"
and a beep, lasting for about 2 seconds.
The TIPC is an early, not really compatible clone of the IBM PC 5150. I
wonder if I need to do some reengineering and/or disassembling or if
there is a service manual out there.
greetings,
Martin
--
Martin Peters
martin at shackspace.de
29 May
29 May
12:13 p.m.
On 5/28/16 1:42 PM, Martin Peters wrote:
The TIPC is an early, not really compatible clone of
the IBM PC 5150. I
wonder if I need to do some reengineering and/or disassembling or if
there is a service manual out there.
I bought a copy last year. It doesn't look like I've scanned it yet but I have
seen it withing the last 6 months, so I'll try to find it.
1:42 p.m.
Hi Al!
Al Kossow:
On 5/28/16 1:42 PM, Martin Peters wrote:
Thanks. Technical Documentation of the TIPC seems to be rare.
greetings,
Martin
--
Martin Peters
martin at shackspace.de
The TIPC is an early, not really compatible clone
of the IBM PC 5150. I
wonder if I need to do some reengineering and/or disassembling or if
there is a service manual out there.
I bought a copy last year. It doesn't look like I've scanned it yet but I have
seen it withing the last 6 months, so I'll try to find it. 
30 May
30 May
9:39 p.m.
On Sat, May 28, 2016 at 10:42:29PM +0200, Martin Peters wrote:
I wanted to reactivate a TI Professional Computer
(TIPC) and all I get
some seconds after powering it on is the message
"** system error ** 0004"
and a beep, lasting for about 2 seconds.
The TIPC is an early, not really compatible clone of the IBM PC 5150. I
wonder if I need to do some reengineering and/or disassembling or if
there is a service manual out there.
I didn't find them in the technical reference but did find a list in the
bios listing. If I read that correctly its interrupt or timers failed.
Should be LED ON OFF OFF.
I had one as part of my vintage computer exhibit.
http://www.pdp8online.com/shows/vcfe16/vcfe16.shtml
I had started to put some stuff online. So far I have the disks that we got
from the local TI usergroup.
http://www.pdp8online.com/ftp/software/TI_PC/
1 Jun
1 Jun
7:53 a.m.
On Mon, May 30, 2016 at 09:39:14PM -0400, David Gesswein wrote:
I didn't find them in the technical reference but
did find a list in the
bios listing. If I read that correctly its interrupt or timers failed.
Should be LED ON OFF OFF.
Scan of bios listing here. Will try to get the tech ref up in a couple days.
http://www.pdp8online.com/ftp/software/TI_PC/documents/
3 Jun
3 Jun
5:58 a.m.
Hi all!
David Gesswein:
On Sat, May 28, 2016 at 10:42:29PM +0200, Martin
Peters wrote:
On Tuesday we replaced the 8253 and the 8259 and the error was still
there. Yesterday we took a closer look at the Maintenance Manual (s/o
sent me via PM on Wednesday) and the ROM-listing and it seems there is a
c&p-error in table 4-3 on page 4-9:
--- snip ---
11111111 RAM - All bits failed
ON OFF OFF 00000000 Interrupt controller failure
ON OFF ON 00000001 Invalid interrupt
00000010 NMI interrupt failure
00000100 Timer interrupt failure
00001000 FDC interrupt failure
--- snap ---
It should be:
--- snip ---
11111111 RAM - All bits failed
ON OFF OFF 00000000 Interrupt controller failure
00000001 Invalid interrupt
00000010 NMI interrupt failure
00000100 Timer interrupt failure
00001000 FDC interrupt failure
--- snap ---
We measure the additional diagnostic information on the onboard parallel
port and it turned out, it was a FDC interrupt failure. After replacing
the 1793 on the motherboard, the "** system error ** - 0004" message
was gone. \o/
Now, there is a "** keyboard error ** - 0010", sometimes "0011" and
the
system boots to the DOS-Prompt of the installed MS-DOS 2.11 anyway, but
it is not possible to enter commands. The CAPS key works, so I think,
the keyboard is not damaged (at least not substantially). I think, the
transceiver components on the mainboard have blown. When I tested the TI
PC the first time (about two years ago), I suspected the "** system
error ** - 0004" to be a keyboard error, so I tested it with a
PC-keyboard (bad idea!), not knowing the TI PC being a very special
non-IBM-compatible device :-(
The 8251 is already replaced unsuccessfully, so the next step is to
change the receiver and transmitter on the mainboard. I'll report.
Greetings,
Martin
I wanted to reactivate a TI Professional Computer
(TIPC) and all I get
some seconds after powering it on is the message
"** system error ** 0004"
and a beep, lasting for about 2 seconds.
The TIPC is an early, not really compatible clone of the IBM PC 5150. I
wonder if I need to do some reengineering and/or disassembling or if
there is a service manual out there.
I didn't find them in the technical reference but did find a list in the
bios listing. If I read that correctly its interrupt or timers failed.
Should be LED ON OFF OFF.
8 Jun
8 Jun
6:01 a.m.
Hi all!
Martin Peters:
(...)
We measure the additional diagnostic information on
the onboard parallel
port and it turned out, it was a FDC interrupt failure. After replacing
the 1793 on the motherboard, the "** system error ** - 0004" message
was gone. \o/
Now, there is a "** keyboard error ** - 0010", sometimes "0011" and
the
Ok, it's working again :-)
Great graphical abilities for a PC "clone" in 1983. This could have been
a MDA/CGA/Herc-killer if TI would have decided to sell the videocard for
IBM PCs and compatibles :)
Thanks for all your help.
Greeting,
Martin
--
Martin Peters
martin at shackspace.de
10 Jun
10 Jun
10:03 p.m.
On Wed, Jun 08, 2016 at 12:01:42PM +0200, Martin Peters wrote:
...
Ok, it's working again :-)
Good to hear.
I got a scan of my tech ref up now.
http://www.pdp8online.com/ftp/software/TI_PC/documents/
You had said
Yesterday we took a closer look at the Maintenance
Manual (s/o
sent me via PM on Wednesday)
Is that the same as the manual I just put up or different? If different
could I get a copy?
11:08 p.m.
On 6/10/16 7:03 PM, David Gesswein wrote:
On Wed, Jun 08, 2016 at 12:01:42PM +0200, Martin
Peters wrote:
...
I'm working on post-processing
2241092-0001_Business-Pro_Professional_Computer_Hardware_Technical_Reference_Apr86
right now..
Ok, it's working again :-)
Good to hear.
I got a scan of my tech ref up now.
http://www.pdp8online.com/ftp/software/TI_PC/documents/
You had said
Yesterday we took a closer look at the
Maintenance Manual (s/o
sent me via PM on Wednesday)
Is that the same as the manual I just put up or different? If different
could I get a copy?
2963
days inactive
2977
days old
10 comments
3 participants
participants (3)
-
aek＠bitsavers.org -
djg＠pdp8online.com -
martin＠shackspace.de