[Simh] Problem with I1620 - Monitor I Operating System

Michael Short michael.short.47 at gmail.com
Wed Mar 22 18:12:17 EDT 2017


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 <rsancho at indra.es>
wrote:

> Hi
>
>
>
> I’m trying the SimH I1620 and faced some problems.
>
> I’m installing Monitor I System, the Operating System.
>
>
>
> I’ve been searching the maillist for help and found your email “Problem
> with I1620”, that suggest you already done it
>
>
>
> What happens to me is that the normal installs generates a CYLINDER
> OVERFLOW error. If I comment out the overflow checks in sim code, then
> installation goes on. I’m using the current GitHub code. Did you get this
> behavior?
>
>
>
> Best regards
>
> Roberto
>
>
>
> BTW: Monitor I is little known and deserves a better place in OS timeline.
>
> As I could see, IBM 1620 Monitor I -> IBM 1130 DMS -> IBM System/3 SCP ->
> IBM System/32 … -> OS/400
>
> The three first ones available for SimH J
>
>
>
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