drive/interrupts/timera

[dirkwhoffmann]

From the README file:

timera.asm:
- hooks a timer interrupt (VIA2 timer A) and reads from another timer (VIA1
  timer A) which creates a typical pattern.

  Note: the first number (and thus the entire pattern) seems to not only depend
        on the type of mechanic used in the drive, but also in the state the
        drive was before (preferably before running the test, first load the
        directory so the head is on track 18, then powercycle the drive and run
        the test)

timera-ref1  FCFB 00    (Mitsumi D500, 1541C) (VICE 1541,1541-II)
timera-ref2  9B5B 01    (1541-II) (1541-II, no disk) (Mitsumi D500, 1541C, no disk)
timera-ref3  FCED 02    (Alps, 1570) (Alps, 1570, no disk) (VICE 1570,1571)

VICE: 👍

VirtualC64: 🙈

[dirkwhoffmann]

For reference. Hoxs64: