henkp@nikhefk.UUCP (Henk Peek) (01/17/88)
In article <352@westmark.UUCP> dave@westmark.UUCP (Dave Levenson) writes: ->In article <63200021@convexe>, loafman@convexe.UUCP writes: ->> /* Written 9:41 am Dec 29, 1987 by tim@doug.UUCP in comp.sys.ibm.pc */ ->> /* ---------- "High density drive in AT (not quad)" ---------- */ ->> > I am approaching my frustration limit w.r.t. trying to read and write ->> > to high-density disks on my quad-density (96tpi) drive. While I ->> > get no error writing to hd disks, they can not then be read on ->> > various xt's about. ->Quad-density (720 kbytes / diskette) is not compatible with either ->High Density (1.2 Mbytes / diskette) or Double Density (360 kbytes / ->diskette). The AT-compatible High Density drives and controllers are ->capable of writing either HD or DD format, but not QD format. HD drives can write QD (720K) format. Only PCDOS and MSDOS does not support it. A few months ago, after a long discussion, there was posted the public domain program intrcpt.asm written by Stanford J. Zelkovitz. It intercepts some DOS internals and works with PCDOS 3.2 and 3.3. I use it to read and write QD disks on a commodore PC40 (AT). (Only formatting QD disk goes wrong in the commodore, but I format QD disks at home on a XT compatible). Henk Peek ..!uunet!mcvax!nikhefk!henkp.UUCP