memory map for RT-11 v 5

Paul Koning paulkoning at
Sun Jul 24 16:37:25 CDT 2016

> On Jul 24, 2016, at 11:06 AM, william degnan <billdegnan at> wrote:
>> ...
>> Attempts to boot from RT11SJ.SYS under V04.00 of RT-11 with 24K
>> bytes of memory were successful.  Attempts to boot with 16K bytes of
>> memory were also successful.  An RK05 was used as the disk drive.  The
>> error message "Insufficient memory" is displayed, but some useful work
>> might be done with just 16K bytes of memory. However, you did not
>> ask if useful work being done was one of the criteria?

FWIW, I used to run RT11SJ on an 11/20 with 8 kW (16 kB) of memory and RC11 system disk, in college.  That fit with no trouble, enough room to run RT BASIC and a reasonably application program.


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