[LV] Console-mode oddity

[Neale Banks]

Hi all,

I finally got around to documenting this oddity....

Essentially, if I load this TINY program:

	ADDW3 R0,R1,R2
	HALT

into memory (say at address 0x8000) on a freshly powered-on VAX then it
runs as expected first time but re-running it leads to an unexpected
result: instead of halting, there is a pause and then the boot-device
options are displayed.

The complete console session is appended for reference.

Any ideas why it apparently runs OK the first time, but not the second?

Thanks,
Neale.

==============================8<==============================
^Q
^Q
^Q
KA42-A  V1.2          ^D^B^A

F_..E...D...C...B...A...9...8...7...6...5...4_..3_..2_..1?..


 ?  E  0040  0000.0005
 ?  C  0080  0000.4001
 ?  7  80A0  0000.4001
 ?  6  80A1  0000.4001
??  1  00C0  0000.7004
^Q^Q
>>> DEPOSIT /L /N:1  8000  525150A1

>>> DEPOSIT /L /N:1  8004  00

>>> EXAMINE /L /N:2 8000

  P 00008000  525150A1
  P 00008004  00000000
  P 00008008  00000000
>>> DEPOSIT /G 0 40

>>> DEPOSIT /G 1 02

>>> DEPOSIT /G 2 00

>>> EXAMINE /G /N:8 0

  G 00000000  00000040
  G 00000001  00000002
  G 00000002  00000000
  G 00000003  00000000
  G 00000004  00000000
  G 00000005  00000000
  G 00000006  00000000
  G 00000007  00000000
  G 00000008  00000000
>>> EXAMINE /G /N:8 8

  G 00000008  00000000
  G 00000009  00000000
  G 0000000A  00FFEA00
  G 0000000B  00FFDE00
  G 0000000C  00000000
  G 0000000D  00000000
  G 0000000E  00000200
  G 0000000F  00000200
?26 ILL ADR
>>> START 8000
^Q
?06 HLT INST
    PC = 00008005
>>> EXAMINE /L /N:2 8000

  P 00008000  525150A1
  P 00008004  00000000
  P 00008008  00000000
>>> EXAMINE /G /N:8 0

  G 00000000  00000040
  G 00000001  00000002
  G 00000002  00000042
  G 00000003  00000000
  G 00000004  00000000
  G 00000005  00000000
  G 00000006  00000000
  G 00000007  00000000
  G 00000008  00000000
>>> EXAMINE /G /N:8 8

  G 00000008  00000000
  G 00000009  00000000
  G 0000000A  00FFEA00
  G 0000000B  00FFDE00
  G 0000000C  00000000
  G 0000000D  00000000
  G 0000000E  00000200
  G 0000000F  00008005
?26 ILL ADR
>>> START 8000
^Q



 VMS/VMB  ULTRIX    ADDR    DEVTYP  NUMBYTES  RM/FX  WP  DEVNAM
 -------  ------  --------  ------  --------  -----  --  ------
 ESA0     SE0     08-00-2B-0E-52-40

 ...HostID....    A/6       INITR

 ...HostID....    B/6       INITR


 [ESA0:]  ?>>>  
==============================8<==============================
_______________________________________________
Linux-Vax mailing list
Linux-Vax at pergamentum.com
http://www.pergamentum.com/mailman/listinfo/linux-vax