On 2024-30-01 19:16:13 James Knott wrote:
On 1/30/24 17:49, Carlos E.R. via openSUSE Users wrote:
Yeah, I remember overlays in MsDOS.
I started working on that Nova system at the end of 1977, almost 4 years before there was such a thing as MS-DOS.
Those were the days... My first job was with Miami's Dade County government. Their IBM S/360 computer, which supported agencies county-wide, had 64K of memory. Application programs were limited to 52K; the remaining 8K was reserved for the operating system (OS/360). Large applications used overlays; virtual storage was yet to come. When we upgraded to a S/370 and OS/VS2 R1 with virtual storage, the large FORTRAN program (more than one box of punch cards, enormous for a FORTRAN program) that the agency I worked at unloaded its overlays and found that it took up about 760K! a monster. :-) Leslie -- Platform: Linux Distribution: openSUSE Leap 15.4 - x86_64