[Simh] pdp10 mux and clock issue?

[Mark Pizzolato]

Hi Quentin,

Please try using the latest code from https://github.com/simh/simh (available as a zip from https://github.com/simh/simh/archive/master.zip) and confirm if you are still seeing the problems.  Also, please identify what telnet client you are using to connected to the DZ ports.

Thanks.


-          Mark

From: Simh [mailto:simh-bounces at trailing-edge.com] On Behalf Of Quentin North
Sent: Monday, February 25, 2019 2:54 PM
To: simh <simh at trailing-edge.com>
Subject: [Simh] pdp10 mux and clock issue?

Hi

Im using the pdp10 emulator and running tops10 7.0.4 and Im seeing a couple of issues:

- Intermittently a terminal session will issue a TOPS-10 command (say R SUBFIL) and the mux will echo the characters but then the session will not do any output from the system until I go to the CTY and get it to output some characters in user mode (ie outside of OPR console) and then the output will be released on the user terminal. Input continues to be echoed but there is no output until I do something on the other terminal. This seems to happen more on simhv3.9-0 vs simhv4.0-0 but occurs on both. Im not sure if this is a mux problem or an execution problem.

- The clock seems to drift slowly backwards. Over the space of a day it appeared to loose about 5-10 mins.

Does anyone have any ideas of what may be the issue or what further diagnostics I could do when the problem, especially the paused output problem, occurs?

The setup is using CPU IDLE, show config is:

sim> show conf
PDP-10 simulator configuration

CPU, idle enabled, stability wait = 20s, 1048KW, TOPS-10
PAG, 2 units
  PAG0, 512W
  PAG1, 512W
TIM, address=3760770-3760775, Y2K OS
FE, 2 units
  FE0
  FE1
UBA, 2 units
  UBA0, 64W
  UBA1, 64W
PTR, disabled
PTP, disabled
RY, disabled
LP20, address=3775400-3775417, vector=754, attached to printer.out
CR, disabled
RP, address=1776700-1776747, vector=254, 8 units
  RP0, 39MW, attached to disks/t10b.dsk, write enabled, RP06
  RP1, 39MW, not attached, write enabled, RP06
  RP2, 39MW, not attached, write enabled, RP06
  RP3, 39MW, not attached, write enabled, RP06
  RP4, 39MW, not attached, write enabled, RP06
  RP5, 39MW, not attached, write enabled, RP06
  RP6, 39MW, not attached, write enabled, RP06
  RP7, 39MW, not attached, write enabled, RP06
TU, address=3772440-3772473, vector=224, 8 units
  TU0, not attached, write enabled, SIMH format, unlimited capacity
  TU1, not attached, write enabled, SIMH format, unlimited capacity
  TU2, not attached, write enabled, SIMH format, unlimited capacity
  TU3, not attached, write enabled, SIMH format, unlimited capacity
  TU4, not attached, write enabled, SIMH format, unlimited capacity
  TU5, not attached, write enabled, SIMH format, unlimited capacity
  TU6, not attached, write enabled, SIMH format, unlimited capacity
  TU7, not attached, write enabled, SIMH format, unlimited capacity
DZ, address=3760010-3760017, vector=340-344, lines=8, attached to 2020, 8b, 1 connection


sim> show ver
PDP-10 simulator V3.9-0 [64b data, 32b addresses, no Ethernet]




-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.trailing-edge.com/pipermail/simh/attachments/20190225/424df524/attachment-0001.html>