Hi,
there are some problems to start some(!) MVME167.
- the power supply should be good, if not the voltage monitoring would
set the error LEDs.
TIA, Ralf
Could you check the ripple voltage on the +5V rail with a scope?
Did you try running the board with J1 jumper on pins 3-4 removed to forcedefault setup / operation parameters in ROM? Alternatively you can also
Then use cnfg;m and env;d to rewrite the configuration of the board.
Hi,
there are some problems to start some(!) MVME167.
EPROM sockets U1 and U2 are populated with the Motorola 167Bug, the
sockets U3 and U4 with the Microware stuff running OS-9/68k V3.0. They
are marked as "1.01" probably by Dr. Keil in Germany in the 1990s.
After reset:
| Copyright Motorola Inc. 1988 - 1994, All Rights Reserved
|
| MVME167 Debugger/Diagnostics Release Version 2.2 - 01/14/94
| COLD Start
|
| Local Memory Found =06000000 (&100663296)
|
| MPU Clock Speed =33Mhz
|
| ROMboot in progress... To abort hit <BREAK>
That's what I exspect. The configuration should start the OS-9 ROM
without user action. I exspect so see the OS-9 boot menu:
| OS-9/68K System Bootstrap
|
| BOOTING PROCEDURES AVAILABLE ----- <INPUT>
|
| Boot from Teac SCSI floppy drive - <fs>
| Boot from SCSI(SCCS) hard drive -- <hs>
| Load Bootfile from ROM ----------- <lr>
| Boot from ROM -------------------- <ro>
| Reconfigure the boot system ------ <rc>
| Restart the system --------------- <q>
|
| Select a boot method from the above menu:
Very often (estimated 90%) I get this rubbish instead of the boot menu:
| x~xxxxxxx~x~xs~~@<~`~xfx~~x~`f`x@sf~`
| f~~@|f~~@|xxxxxxxfffxx83x<~`xx~xf~~`@|~~~@xO~p~xxx~~xxxx~xx<3~`@<x~
| x~~~~
| ~~~xxxxx
|
| x
| ~~xxxxx0~xx<`xxs`xxx~@<~@xxxxxxxxxxxxx<xx<~`@xx~xBs@xxxxxxxxxxxxxx
| xxxxxxxxx~xxf~
...
When typing I get an echo, but not what I typed in. So I tried to test:
- other terminal: the same rubbish
- other baud rate: no change from 1200Baud to 38400Baud (I tried just
the typical baud rates)
- changed the EPROMs because they are old and sometimes they seem to
forget a bit, or two ... I burnt a new set.
- changed the NVRAM chip: I know that some of them are dead (battery),
but I don't have new ones, just some other which seem to work fine
- the power supply should be good, if not the voltage monitoring would
set the error LEDs.
Are there any ideas to locate and fix the error(s)?
I want to run the Motorola 167bug and OS-9 V3.0(.3).
TIA, Ralf
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