On 3/1/23 15:36, Fred Cisin via cctalk wrote:
> Chuck once told us that DRIVPARM can be coerced into working on some of
> the systemes that it won't work on, by inserting some Ctrl-A characters;
> DRIVPARM ^A^A^A /D:2 /F:2
>
>
> BTW, FORMAT, DRIVER.SYS uses the tracks and sectors that you specify
> FORMAT E: /T:80 /N:9
> ONLY to select WHICH ONE from the internal list. It WILL NOT let you
> change a format, such as
> FORMAT E: /T:77 /N:8 unless it already has that format somewhere in
> the internal list.
>
> https://retrocmp.de/fdd/8inch/drivparm.htm
> https://retrocmp.de/ms-kb/Q35766%20Supported%20Values%20for%20FORMAT%20:N%20and%20:T%20Switches.txt
>
> /F:3 was once 8" SD
> /F:4 was once 8: DD
> Any machines, other than SCP that still support those?
>
In PC DOS 3.2 and 3.3
When using PC DOS 3.2 or 3.3, DRIVPARM is undocumented but it can be
made to work using this trick. In CONFIG.SYS, type:
Normal DOS 4.0+ DRIVPARM set-up switches.
\/
DRIVPARM ^A^A^A {switches}
/\
Type Ctrl-A, not Shift-6 A. In MS-DOS's Edit, type Ctrl-P
then Ctrl-A (you will see a smiley face on the screen).
>From https://www.doomi.ch/undocumented-dos-commands/
--Chuck
