11/04 Project

[John Welch]

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-bounces at classiccmp.org> namens John Welch via 
> cctech <cctech at classiccmp.org>
> *Verzonden:* Wednesday, December 13, 2017 7:23:01 PM
> *Aan:* cctech at 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