Johnson Lam has posted a new DRIVERS.ZIP file, now dated 19-Oct-2014 and with an updated UHDD driver, in his "dropbox" at:
<http://dl.dropboxusercontent.com/u/15785527/drivers.zip> No change to any of the other drivers but re-dating them 19-Oct-2014 for consistency, also no change to the /B "stand alone" UHDD. UHDD's /M switch is deleted. It shall now set a 256-byte binary search buffer, not 512. The short buffer still avoids 6 XMS accesses in every cache binary search, which increases speed. It also helps UHDD + UDVD2 (4400 HMA bytes total) fit in the limited HMA of V7.0+ MS-DOS (max. 8976 bytes) with up to 12 DOS buffers. For these reasons, UHDD's buffer has been made permanent, and /M is now unneeded. UHDD now overlaps caching tasks with UltraDMA disk I-O! Disk input may not be overlapped, as at least one extra XMS move is needed (user-buffer to cache, or vice-versa, depending on UltraDMA "rules"). That move may not begin until input is finished. But, disk output CAN be overlapped, and an extra XMS move (if needed) can be done during output DMA! Adding only UltraDMA output overlap, and doing some cache work after DMA end but before disk "ready", i.e. in the last inter-sector "gap" of each disk I-O, all WORKED the very first time! UHDD now has noticeably more speed! This is especially true for slower laptop or "old" disks, whose sector "gaps" give UHDD more time to overlap XMS binary searches, etc. More difficult to add in UIDE, with its integrated logic, while UHDD has separate stand-alone and caching UltraDMA subroutines. Many UIDE users want the driver to remain as-is, so it was again left alone. Those who desire more speed can switch from using UIDE to using UHDD + UDVD2. ------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
