Re: [Simh] Problem with I1620 - Monitor I Operating System

2017-03-22 Thread Michael Short
During the load of the MON1 there is a three sector write which crosses a cylinder boundary. If the Cyl O'vflw is set to program the load should complete. On Wednesday, March 22, 2017, Sancho Villa, Roberto wrote: > Hi > > > > I’m trying the SimH I1620 and faced some problems. > > I’m installing

Re: [Simh] [SimH] Networking support

2016-03-12 Thread Michael Short
On the history of networks, there was also a network called BITNET which was mainly used by educational institutions using mainframes. Started around 1981, it was originally based on the bisync protocol and was a store-and-forward system. At it peak it had about 500 organizations and about 3000 nod

[Simh] 1620 simulation

2016-02-25 Thread Michael Short
Since moving to Win 10 my 1620 simulation is acting some what strangely. The Fortran compiles and executes the code but SPS dose not. It goes through the first pass giving some strange error messages, prints out a correct symbol table but then prints roughly every other source line. I was wonderin

[Simh] Non-numeric character in IBM 1620 P & Q addresses

2015-12-22 Thread Michael Short
This might be slightly off topic but it does involve operation on a real 1620. I have the coding for a transition program IBM wrote to help 1620 users move to 360/370 computers. I have a good portion of the code working but I've run into a snag testing out the Disk Utility Program. A sequence of

[Simh] Problem with I1620

2015-06-16 Thread Michael Short
Since the release of the version of I1620 which fixed the missing TFL instruction, I have been having a problem running Fortran and SPS jobs. The jobs halt with the following message: CDR ERR `04272 `0`6`07`16`17`25`36`37`38 For Fortran, if I give a 00 response, the job continues onto another HA

[Simh] Running a BACKUP job on TOPS-10

2015-04-04 Thread Michael Short
I have been trying to run a BACKUP job but I can't seem to get the commands right to get the tape mounted. I keep getting the message ?BKPCOM Can't open MAG tape when I issue the TAPE command. I think it has something to do with the ALLOCATE or MOUNT, but MOUNT queues and never quits. It appears t