11/04 Project

[JCWelch]

I am much confused as to how to connect TP1, TP2, TP3, & TP4.
there is a wire coming in with spade lugs.  One wire is red, one clear, and one black. Just to be share which color goes to which TP lug?

Sent from my iPad

On Dec 13, 2017, at 8:37 PM, John Welch <jcwelch at hal-pc.org> wrote:

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
<jcwelch.vcf>