On Sat, Sep 19, 2020 at 04:28:00PM +0200, Eric Auer wrote: > About your missing 10 kB: That might be extra driver > data, extra BIOS data, a virus, depends. Just telling > DOS to use them anyway will not be the solution. You > could use DEBUG to see what is in those 10 kB.
You mean "extra driver data" not shown by "mem"? Or BIOS data within 640 KB? Also what I dislike in this mobo is modest amount of UMB. My old Soyo (ISA/VLB) offers about 140 KB of UMB, while this one just about 70 KB. Another thing is: that UMB area is somehow "mismanaged" here. For example: when I use EMS DISPLAY.SYS places his 12 KB into "conventional memory", although still almost 20 KB free in UMB is reported by "mem". Probably fragmented(?), or similar issue. > Your mainboard http://www.asrock.com/mb/SIS/K7S8XE/ > (AGP, AMD Socket 462) says "Floppy 1 connector" and > there are BIOS updates from 2004 for newer CPU and > some smaller fixes. > > https://download.asrock.com/Manual/K7S8XE.pdf > > does not show the submenu for floppy, so I wonder > whether you can configure the controller to use > two floppy disk drives at the same time there? Meanwhile I found description of probably the same issue: https://retrocomputing.stackexchange.com/questions/1452/only-drive-a-detected-with-two-floppy-disk-drives So unfortunately it seems it's the "feature" and nothing can be done :( -- regards, Zbigniew _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
