noelroy@kean.ucs.mun.ca (Noel Roy, Economics Dept., Memorial University) (05/03/90)
In article <1990May1.171909.11513@bach.amd.com>, phil@pepsi.amd.com (Phil Ngai) writes: > In article <83039@kean.ucs.mun.ca> noelroy@kean.ucs.mun.ca (Noel Roy, Economics Dept., Memorial University) writes: > |This happens to me too. I think the problem is that QEMM needs a > |block of CONTIGUOUS memory in high memory large enough to load the > |program. PCSHELL requires about 128K to start up (it packs down to > |10k with the /r switch, but leeds to load into 128k to do this). so > |unless you have 128K of contiguous memory free up there, it can't be > |loaded. > > VGA BIOS is from C000 to C7FF. If you don't have an EMS page frame, > then you get 160K from C800 to EFFF. What's the problem? > (If you can map out the first 32K of your motherboard BIOS, then > you get 192K from C800 to F7FF) > > -- > Phil Ngai, phil@amd.com {uunet,decwrl,ucbvax}!amdcad!phil > If more freeways causes more freeway usage, why doesn't more > transit cause more transit usage? My high memory maps as follows: A000-AFFF VGA graphics BOOO-B7FF Text display B800-BFFF Free C000-C7FF Video ROM C800-CFFF Free D000-DFFF EMS page frame E000-E7FF Shadow ROM (can't disable) E800-EFFF Free F000-FFFF Shadow ROM (can't disable) So, it's pretty crowded up there. EMS means more to me than loading PCSHELL in high RAM. -- Dr. Noel Roy bitnet: NOELROY@MUN Department of Economics internet: noelroy@kean.ucs.mun.ca Memorial University of Newfoundland cdnnet: noelroy@kean.mun.cdn St. John's, Newfoundland A1C 5S7 Canada
phil@pepsi.amd.com (Phil Ngai) (05/04/90)
In article <83717@kean.ucs.mun.ca> noelroy@kean.ucs.mun.ca (Noel Roy, Economics Dept., Memorial University) writes: |My high memory maps as follows: | | A000-AFFF VGA graphics | BOOO-B7FF Text display | B800-BFFF Free | C000-C7FF Video ROM | C800-CFFF Free | D000-DFFF EMS page frame | E000-E7FF Shadow ROM (can't disable) | E800-EFFF Free | F000-FFFF Shadow ROM (can't disable) Some questions: 1) Are you sure that B800-BFFF is free? Most VGA do use it. 2) Are you sure you can't disable shadow RAM? 3) Have you tried RAMming F000-F7FF? 4) Have you tried moving the EMS page frame so your contiguous free hi-memory is as large as possible? -- Phil Ngai, phil@amd.com {uunet,decwrl,ucbvax}!amdcad!phil Government: organized crime with an attitude.
jmerrill@jarthur.Claremont.EDU (Confusion Reigns) (05/05/90)
In article <1990May3.195543.19190@bach.amd.com> phil@pepsi.amd.com (Phil Ngai) writes: >In article <83717@kean.ucs.mun.ca> noelroy@kean.ucs.mun.ca (Noel Roy, Economics Dept., Memorial University) writes: >|My high memory maps as follows: >| >| B800-BFFF Free > >Some questions: > >1) Are you sure that B800-BFFF is free? Most VGA do use it. Only if you have a color display. Mono uses B000-B7FF for the text display, while color uses B800-BFFF; this is why you can put a color VGA and a Hercules in the same machine. -- Jason Merrill jmerrill@jarthur.claremont.edu