bosse@eri-tin.ericsson.se (Bosse Sandholm) (08/22/88)
I am building my own pc-clone using far-east cards. I have a problem with the floppy in 1.2Mb mode. I have a TEAC 55GFV floppy and i have tried using 2 different floppy controllercards and i get the same error with both cards. I can't get the PC-AT to recognize that i have changed disk, if I give a dir command and changes to a new disk and gives a new dir I get the list from the first disk. can anybody help me. bosse@erix.ericsson.se ..!uunet!mcvax!enea!erix!bosse
spolsky@eniac.seas.upenn.edu (Joel Spolsky) (08/23/88)
In article <1761@erix.ericsson.se> bosse@eri-tin.ericsson.se (Bosse Sandholm) writes: > >I can't get the PC-AT to recognize that i have changed disk, if I give a dir >command and changes to a new disk and gives a new dir I get the list from the >first disk. > (shot in the dark) Sounds like it's reading from the cache and not the disk. This happens if the software (DOS?) thinks that the floppy disk is really a fixed disk and can't be changed. In DOS there is a command FASTOPEN that means _never_ look at the physical media - maybe you have something like this in an AUTOEXEC.BAT file? Unix-like operating systems are even hairier, you have to explicitly remount when you change the floppy. Joel Spolsky
richard@neabbs.UUCP (RICHARD RONTELTAP) (08/24/88)
[ Floppy doesn't recognize changed disks ] I have such a wierd floppy drive too. When I press ctrl-C or ctrl-BREAK, the floppy will recognise the new disk. On my drive I can not switch to a high density floppy. To get the drive to recognise it, I have to pretend formatting the floppy first. Very annoying, but ah, it it just a test computer built from flaky parts: like the original IBM 6 Mhz AT motherboard... Richard
cww@ndmath.UUCP (Clarence W. Wilkerson) (08/24/88)
IOn my Toshiba, there is a jumper to activate the disk change feature. Another way is to tie line 34 of the connection hi or lo ( don't remember which way). .
rsj@wa4mei.UUCP (Randy Jarrett WA4MEI) (08/25/88)
In article <1761@erix.ericsson.se> bosse@eri-tin.ericsson.se (Bosse Sandholm) writes: >I can't get the PC-AT to recognize that i have changed disk, if I give a dir >command and changes to a new disk and gives a new dir I get the list from the >first disk. > Check the door switch on the disk drive. Some of the older 1.2 drives did not have the switches and dos uses this to decide if it needs to re-read the floppy. If you are using a used drive you might not have the switch or it might be bad. -- Randy Jarrett WA4MEI UUCP ...!gatech!wa4mei!rsj | US SNAIL: P.O. Box 941217 PHONE +1 404 493 9017 | Atlanta, GA 30341-0217