On 8/26/2021 5:14 PM, Ray Jewhurst via cctalk wrote:
Long time lurker, extremely rare poster, I was reading the Wikipedia
article on the IBM 1620 and became quite intrigued. I know that there is a
simulator for it on SimH but I have never ran or simulated any card-driven
machines before. I have all the documentation and the ibm1620.zip file
from bitsavers but I am not sure what to do next. I know I would like to
try Monitor, Fortran-II and possibly GOTRAN but I have so many questions.
I read the SimH documentation which gave me some understanding but I don't
know exactly how the card decks work, how to install Monitor or how to boot
Monitor once it is installed since I know you have to boot off a deck. My
final question is, is there an easy to use card-driven machine to cut my
teeth on? Also, any anecdotes on any of the old IBM computers would be
both welcome and greatly appreciated.
Thanks in advance
To run from cards, you probably will need to look up the exact keys, but
basically you insert a boot instruction in memory with the machine halted
then run it.
You prepare one of the decks in the card reader prior to that (keep the
SIMH console hand).
The Fortran compiler will need a punch file specified where you can find it,
as each pass will punch cards that need to be successively read in on
I've not run one with a disk or paper tape or other facilities, but the
reader / punch
/ printer / cpu setup wasn't too hard to run.
Run assembler if you want to study for a while.