9fefa6de   
   XPost: comp.sys.ibm.pc.classic   
   From: marten.kemp@thisplanet-link.net   
      
   Jim Leonard wrote:   
   > On Nov 11, 6:27 pm, Marten Kemp    
   > wrote:   
   >> 'Cause a VGA card would use up segment A,   
   >> which I want to use for 704k base memory.   
   >   
   > I'm curious why running 704K free DOS RAM is a requirement.  Is it   
   > because you're curious to see how it works?  If it's because you want   
   > to run a lot of TSRs, there are ways to do that without significantly   
   > impacting DOS RAM.   
      
   Because I have a modified U44 PROM that'll map memory   
   into segments A, C, D and E, plus one device driver   
   that'll turn up tp a full segment into an LRU disk   
   sector buffer and another that'll turn the rest into   
   XMS UMBs so I can use LOADHI and DEVICEHI.   
      
   I'll copy the floppy and SCSI controller BIOSen into   
   a single EPROM and put it in the socket where ROM   
   BASIC usually lives; might have to tweak the BIOS a   
   bit to scan F000-F800 for device BIOSen and totally   
   ignore BASIC.   
      
   Version 2 will be to change the address decode on an   
   IBM MDP card to segment E and have 896k base memory.   
      
   Just to see if I can.   
      
   --   
   -- Marten Kemp (Fix ISP to reply)   
   You can't help being ignorant 'cause there's always   
   something you don't know; what you can't be is stupid.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)