Ethan Dicks <ethan_dicks(a)yahoo.com> wrote:
16-bit machines (PDP-11) use 12 sector cartridges.
12-bit machines (PDP-8)
use 16-sector cartridges. The difference is in how many saw cuts are made
in the aluminum rim on the bottom. While it is *theoretically* possible
to plug the wrong cuts and make new ones in the correct place, I am not
aware of anyone attempting this, let alone succeeding.
Better yet, how about a hardware hack that drops the hard sector pulses
entirely, and uses a PLL to derive the desired number of sector pulses
from the index pulse?
Should be possible to implement with a software digital PLL in a Scenix
microcontroller, or maybe even a PIC.
Then you could mount a switch on the front panel to select 12 or 16 sector
operation, regardless of the pack.