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- Originated - 7/8/82 by Tom Vyse, San Diego, Calif.
-
- The FAST program is specific to the Osborne 1.
-
- It also will only work on those Osbornes which have
- MPI disk drives. Those can be identified by a plastic
- lever hanging down in the right hand side of the
- disk drive slot. This is part of the door interlock
- mechanism. Osbornes are also shipped with other, and
- frequently slower, drives from different manufac-
- turers.
-
- FAST is designed to increase the disk drive step
- rate from 20 ms./step (the default) to 6ms./step.
- It does this by altering the value in the operating
- system parameter table which controls this rate.
- The address of this parameter (in both versions
- 1.2 and 1.3) is EF13H. The effect of various
- parameters in this location are:
-
- Value Step Rate
- ----- ---------
-
- 0 6 ms. (MPI only)
- 1 12 ms.
- 2 20 ms. (Seimens)
- 3 30 ms.
-
- The code to drive this is simply:
-
- MVI A,0
- STA 0EF13H
- JMP 0
- END
-
- Not much of a program, but it sure makes programs
- with a lot of disk access run nicer. Also, the MPI
- drive will operate more quietly at the higher step
- rate.
-
- Fini.
- n nicer. Also, the MPI
- drive will operate more quietly at the higher step
- rate.
-
- Fini.