I have bi-directional communication from PC/Hyperterminal. I forgot
about having to tell HyperTerminal to echo characters locally. Anyway,
'a' comes over as 000141 and 'A' comes over as 000101. So far so good.
However, I have not gotten "@"
CNTRL+HLT
CLR
LAD
DEP
CNTRL+INIT
CNTRL+START -> reads 000002
CNTRL+BOOT -> reads 165024
CLR, 165024 LAD, CTRL/START reads 165024
773024 LAD, EXAM, reads 165024
Reconfigured the switches on the M9312
1 2 3 4 5 6 7 8 9 10
--- --- --- --- --- --- --- --- --- ---
S1 Off On Off Off Off Off Off Off On Off
CNTRL+HLT
CLR
LAD
DEP
CNTRL+INIT
CNTRL+START -> reads 000002
CNTRL+BOOT -> Run light is on, SR Disp light is on,
CNTRL+HLT reads 173150
CLR, 165024 LAD, CTRL/START reads 165024
773024 LAD, EXAM, reads 165024
773024 LAD, 773000 DEP, BUS ERR light comes on.
Any suggestions? I have other M9312s I could try.
On 12/13/2017 12:38 PM, Henk Gooijen wrote:
Jumping over the settings. They seem OK, as you get the AB in Hyperterm.
That 777564 shows 000200 is also correct (as I remember that): it
indicates “transmit buffer empty”.
You can also try it the other way:
* type one character in Hyperterm
* check that 777560 has the receiver buffer full flag set (000200)
* in 777562 you will see the typed character (in octal)
773024 showing 165024 rings a bell. IIRC, 165024 is the start address
of the monitor on the M9312.
That is the PROM “in the middle” on the board.
I think that if you enter CLR, 165024 LAD, CTRL/START you will get the
“@”.
BTW, there is a second start address. One does some diagnostics, the
other does not.
My guess that on 773000 and you getting 773002 on the display means
that you try to boot
from a “device” that is specified in one of the four PROMs, but the
PROM socket is empty …
------------------------------------------------------------------------
*Van:* cctech <cctech-boun...@classiccmp.org> namens John Welch via
cctech <cct...@classiccmp.org>
*Verzonden:* Wednesday, December 13, 2017 7:23:01 PM
*Aan:* cct...@classiccmp.org
*Onderwerp:* 11/04 Project
I am back in front of the machine:
The M7856 is set thusly:
1 2 3 4 5 6 7 8 9 10
-- -- -- -- -- -- -- -- -- -- --
S5 DN DN DN UP DN DN UP DN DN UP
S3 DN DN UP DN UP UP DN UP DN UP
S1 UP UP DN UP DN DN UP UP DN UP
S4 UP UP DN DN UP UP DN DN DN UP
S2 DN DN UP DN DN UP DN DN -- --
The M9312 is set thusly:
1 2 3 4 5 6 7 8 9 10
-- -- -- -- -- -- -- -- -- -- --
S1 UP UP DN DN DN DN UP DN DN DN
This should be 300, 8, Odd, 1
I have what I think is null modem between the M7856 cable and a PC
running XP with Hyperterm set to 300, 8,O,1
Troubleshooting from the programmers console:
CNTRL plus HALT, no bus hang.
CLR, 777566, LAD, 101, DEP, Hyperterm shows: A
CLR, 777566, LAD, 102, DEP, Hyperterm shows: AB (the B popped up next to
the previous A )
CLR, 777564, LAD, EXAM, display shows: 000200
CLR, 773024, LAD, EXAM, display shows: 165024
CLR, 773024, LAD, EXAM, display shows: 165024
CLR, 773000, LAD, CNTRL plus START, console says: 173002
I am thinking that the Hyperterm should be seeing an "@" and I should be
able to boot from there.
Any thoughts?
Sincerely,
John Welch
--
Sincerely,
John Welch
281-353-4706 Home
713-725-7017 Cell
:qw
