Hi! Hmmm you could try japheth.de jemm instead of xmgr umbpci lowdma ;-). Or try himemx plus jemm386, more classic than jemm, same page.
Problem is that devload asks DOS for the highest location which has 64k, without checking how much your driver really needs: It is sys, no exe header so "needs own size plus unknown" where own size is ca 4 kB in your case while only 3 kB stay in RAM. As your 18 kB UMB is smaller than 64kB, devload does not even try using it... Even 3.20rc not. Basically devload has no idea how much RAM your driver really needs, but it probably should have. It could check exe headers, if present, and file sizes. It should not try to alloc more than your max free UMB size (now UMB always tries 64 kB) and should know that less than the needed size is not enough (now checks for 4 kB but that has no effect as DOS will just fall back to low RAM). Affected code: Area around "lowload:", value 0fffh versus "max avail UMB" and "min needed for this driver" and SMALLESTDRIVER (oh well). The current version only uses "attrib" to see if your driver exists at all and "exec" to actually load it - without checking the size. If somebody wants to write a patch: I suggest to patch around "Check whether file exists" and "lowload:", with some variable in RAM which stores the minimum RAM requirement as found by checking the file size and, if exe, header. And with some code which checks how much UMB you could get, to avoid asking for more. If needed > max UMB, use needed anyway, to let DOS automatically fall back to low RAM. If needed < max UMB, alloc max UMB, to give the driver as much UMB as possible for init. Eric ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
