[Simh] XXDP V2 and SimH

[Bob Supnik]

The 11/23 simulator boots the ibiblio image called "xxdp22_with_1123" correctly. However, the image is XXDP+, not XXDP 2.2:

PDP-11 simulator V3.10-0
sim> set cpu 11/23,64
sim> att -e rl c:\temp\xxdp_with_1123.rl02
sim> boot rl


CHMDLD0 XXDP+ DL MONITOR
BOOTED VIA UNIT 0
28K
DOES THIS SYSTEM HAVE A UNIBUS? (Y/N CR=Y) N
NON-UNIBUS SYSTEM

ENTER DATE (DD-MMM-YY): 12-DEC-88

RESTART ADDR: 152010
THIS IS XXDP+.  TYPE "H" OR "H/L" FOR HELP.

.D

ENTRY# FILNAM.EXT        DATE          LENGTH  START

     1  MMDP  .SAV       3-MAR-83C        17    000310
     2  MTDP  .SAV       3-MAR-83C        17    000331
     3  HSAAD0.SYS       3-MAR-83         24    000352
etc

The "xxdp25" image halts, per the analysis in previous messages.

The common factors for failure appear to be either lack of memory management (03, 04, 05, 20) or lack of a LTC control register (03, 23) or both.

It is not possible to add a "DISABLE" feature to the clock, because it is already running before the first simulator command is given, and the simulator can't/won't disable scheduled devices. I will look into adding a "BEVENT DISABLE" for the clock, to mimic real 11/03 and 11/23 systems.

You mentioned that XXDP 2.2 runs on a real 11/23 (with BEVENT disabled) and 11/23+ systems. How much memory is in those systems?

/Bob