cchen@unixg.ubc.ca (Chia-tung Chen) (04/15/91)
Dear Usenet users:
I have some problem with the 3 1/2" 720 K TEAC FD-235F floppy drive on my
XT that I hope some of you can solve. I use DOS V4.01 and driver.sys /d:1
in my CONFIG.SYS to let the DOS recognize that this is a 720 K drive.
The problem I have is if I format a disk at home on this drive, I can only
format it successfully under d:. That is fine, but whatever disks I format
at home is not guaranteed to work on other machine at school. The machines
at school at usually 386 machines with 1.44 meg drive. The machines at school
either give me "FILE NOT FOUND" indicating there is no files on the disk, or
"GENERAL FAILURE" indicating the disk is totally unreadable. However, the disk
that I format at school generally have no problem when I bring it home. But, if
I write something onto that disk, it is not working again on school's machine.
So, I suspect it is because the jumper switch is not set properly on the
drive. I am using the drive on an XT and use it as a B (second) drive. There
is also a 3-pin jumper on the disk connector. Could anyone check the jumper
swithch setting for me? Are they set properly? They are shown below in the
diagrams. If they are right, then is there any thing I do wrong in having the
DOS recognizing this 720 K drive?
My mail address is cchen@unixg.ubc.ca. Thank you very much in advance.
a confused XT user,
chia-tung chen
========================================================
| |
| --------------------------------------- |
| | FRONT DOOR | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ |
| |
| \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ | |
| | o o MS | |
| | | |
| | o o IR | |
| | |-| | |
| | |o| o RY | |
| | | | | |
| | |o| o DC | |
| | |-| | |
| | ------ | |
| | |o o| D1 | |
| | ------ | |
| | o o D0 | |
| | | |
| | o o FG <- CAPACITOR | |
| |---------------------------------------| |
| BACK OF THE DRIVE |
| |
+------------------------------------------------------+
| DIAGRAM OF THE CURRENT JUMPER SWITCH SETTING |
========================================================
========================================================
| disk connector |
| | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | 2 |
| / | ... | |
| 0 --------- | ... | |
| ======= | ... | |
| 1 -|-----|-\ | ... | |
| | | | | ... | |
| 2 -|-----|-/| | ... | |
| ======= o o o o o o o o o o o o o o o o o |
| jumper o o o o o o o o o o o o o o o o o |
| |
+------------------------------------------------------+
| JUMPER SWITCH ON THE DISK CONNECTOR |
========================================================rcp@moth.sw.mcc.com (Rob Pettengill) (04/16/91)
In article <1991Apr14.205938.6817@unixg.ubc.ca> cchen@unixg.ubc.ca (Chia-tung Chen) writes:
;
;Dear Usenet users:
; I have some problem with the 3 1/2" 720 K TEAC FD-235F floppy drive on my
;XT that I hope some of you can solve. I use DOS V4.01 and driver.sys /d:1
;in my CONFIG.SYS to let the DOS recognize that this is a 720 K drive.
;
; The problem I have is if I format a disk at home on this drive, I can only
;format it successfully under d:. That is fine, but whatever disks I format
;at home is not guaranteed to work on other machine at school. The machines
;at school at usually 386 machines with 1.44 meg drive. The machines at school
;either give me "FILE NOT FOUND" indicating there is no files on the disk, or
;"GENERAL FAILURE" indicating the disk is totally unreadable. However, the disk
;that I format at school generally have no problem when I bring it home. But, if
...
Part of your problem is that in additon to the driver.sys /d:1 you
also need a drivparm = statement in your config.sys. drivparm takes the
same arguments as dirver.sys. driver.sys installs a new driver (in
your case for a virtual drive mirroring you b drive). drivparm on the
other hand modifies the parameters of an existing driver - in your
case this needs to be done for the b: 720k drive since the PC/XT bios
doesn't know about this kind of drive.
Unfortunatly, IBM disables the MSDOS drivparm command in the PSDOS
versions of MSDOS. In pcdos 3.3 I have had good luck with placing 4
control-a characters right after the = sign in the drivparm command -
I had trouble with this when I tried it once with pcdos 4.0. Your
other alternative is to go with a generic Microsoft MSDOS 3.3 or 4.0.
It seems that IBM didn't want users to be able to upgrade their 360k
drives to 720k on the PC/XT.
;rob