8 Mar
2016
8 Mar
'16
7:52 a.m.
On Mon, 7 Mar 2016, Rich Alderson wrote:
From: David Griffith
Sent: Saturday, March 05, 2016 9:36 PM
> Would someone please point me towards a tutorial of some sort on running
> the assembler on TOPS20 as presented in Mark Crispin's Panda distribution?
[snip]
COMPILE does only that. LOAD will compile if
necessary and link the result
into an executable image in memory (which can be saved as an executable
program file with the SAVE command). EXECUTE and DEBUG will compile if
needed, link, and respectively either simply start running or invoke DDT
and leave you ready to execute, examine memory, etc.
Do you need a pointer to the user commands manual?
http://www.bitsavers.org/pdf/dec/pdp10/TOPS20/V7/USERS.MEM.txt
Specifically I'm trying to build and run this:
TITLE HACK
SEARCH MONSYM
HACK: SKIPA 4,[^D4]
HACK0: SOJL 4,TRAILL
SETZB 1,3
HACK1: TLNE 1,777777
JRST HACK0
MOVE 2,1
CIRC 2,-^D18
SKIPN 4
SKIPA 1,3
IOR 1,3
LITES%
HALT
HRRZ 2,1
MOVEI 1,30
DISMS%
MOVE 1,2
AOJA 1,HACK1
TRAILL: SETZ 1,
TRALL0: LITES%
HALT
MOVE 2,1
MOVEI 1,30
DISMS%
JUMPL 2,TRAILR
LSHC 1,^D37
AOJA 1,TRALL0
TRAILR: MOVSI 1,400000
TRALR0: LITES%
HALT
MOVE 2,1
MOVEI 1,30
DISMS%
MOVE 1,2
TRNE 1,1
JRST HACK
ASH 1,-1
JRST TRALR0
END HACK
When I do COMPILE, LOAD, and SAVE on it and run the executable, I get
this:
$hack
?Illegal instruction 247100,,777756 at HACK1+3
?Undefined operation code
--
David Griffith
dave at 661.org
A: Because it fouls the order in which people normally read text.
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