RuudB
Experienced Member
Hallo allemaal,
I expanded my XT with 128 KB of SRAM in the D- and E-area. For the schematics please see: http://www.baltissen.org/images/umb4xt.png
Using the right UMB driver I managed to LOADHIGH various drivers like ANSI.SYS and my mouse driver. But it didn't work out for DOS. It seems that HIMEM.SYS is reponsible and that program won't work on a XT.
My question: does anyone have an idea how I can persuade DOS to load itself high in my UMB memory?
One idea of myself: emulating INT 15h in one or another way but then: how to tell DOS to load itself into the UMB area instead of the not-existing HMA area?
Groetjes, Ruud Baltissen
www.Baltissen.org
I expanded my XT with 128 KB of SRAM in the D- and E-area. For the schematics please see: http://www.baltissen.org/images/umb4xt.png
Using the right UMB driver I managed to LOADHIGH various drivers like ANSI.SYS and my mouse driver. But it didn't work out for DOS. It seems that HIMEM.SYS is reponsible and that program won't work on a XT.
My question: does anyone have an idea how I can persuade DOS to load itself high in my UMB memory?
One idea of myself: emulating INT 15h in one or another way but then: how to tell DOS to load itself into the UMB area instead of the not-existing HMA area?
Groetjes, Ruud Baltissen
www.Baltissen.org