mohamed@ecs.umass.edu (08/02/90)
sc PS/2 Question We just acquired a PS/2 Model 80, 70 mb Hard disk, 8 Mb RAM. Though it felt like we got a real hot machine, it has been a disapointment. Running OS/2 and other misc software cut the hard disk memory down to 17 Mb. That's not the real problem. The DOS shell seems to have only 470 K of RAM. That's less than the 640K (- util etc) of RAM for a regular PC-AT. Actually, we were expecting to have a DOS shell with more than or atleast equal to 1 MB of RAM (like some Compaqs etc). Is there any way of increasing the available RAM for the DOS shell ? Specifically, I have to load INGRES-PC and run some SQL/C programs of the DOS shell. mohamed@ecs.umass.edu mohamed@umvlsi.ecs.umass.edu mohamed@sim1.ecs.umass.edu
ie15@vaxb.acs.unt.edu (09/01/90)
In article <10361.26b816b8@ecs.umass.edu>, mohamed@ecs.umass.edu writes: > > Running OS/2 and other misc software cut the hard disk memory down to > 17 Mb. That's not the real problem. The DOS shell seems to have only 470 K > of RAM. > > That's less than the 640K (- util etc) of RAM for a regular PC-AT. Actually, > we were expecting to have a DOS shell with more than or atleast equal to > 1 MB of RAM (like some Compaqs etc). Is there any way of increasing the > available RAM for the DOS shell ? > There are no REAL ways to increase the DOS Box size. If RMSIZE = 640 that is the only memory increaser. You could attempt to limit the memory taken by decreasing FCBs and BUFFERs though. Since OS/2 tries to emulate DOS 3.3 exactly you get the dpressing 640KB barrier yet again. To top it off OS/2 loads ALL sytem device drivers in the lower megabyte of system memory, i.e. the DOS Box segment loses memory again. Ken Tabor University of North Texas