Re: Apple parallel manual

["Paul R. Santa-Maria" <paulrsm@buckeye-express.com>]

John wrote:
> Does anyone have a copy of the newer parallel manual for a parallel
> card?  The manula I am referring to is the one that has the
> information about the DIP switches on the card.

I have an Apple II Parallel Interface Card with part numbers
670-0021-___ and 820-0047-B with the cable and manual(#A2l0045).
The manual has a schematic and a firmware listing -- ahhh, the
good old days.

"Most commonly used printers will operate correctly with the
following switch settings:

 Switch:   SW1 SW2 SW3 SW4 SW5 SW6 SW7
 Setting:  OFF OFF OFF ON  ON  OFF OFF"

Strobe Length (SW1-SW3)

         SW1 SW2 SW3
  1 usec OFF OFF OFF
  3 usec ON  OFF OFF
  5 usec OFF ON  OFF
  7 usec ON  ON  OFF
  9 usec OFF OFF ON
 11 usec ON  OFF ON
 13 usec OFF ON  ON
 15 usec ON  ON  ON

Strobe Output Polarity (SW4)

     SW4
 Neg ON
 Pos OFF

Acknowledge Input Polarity (SW5)

     SW5
 Neg ON
 Pos OFF

Firmware Selection (SW6)
The Centronics firmware is the same as the
old Apple Centronics Interface Card.
The Parallel firmware is the same as the
old Apple Parallel Printer Interface Card.

                                   SW6
 Centronics (no auto LF after CR)  ON
 Parallel (auto LF after CR)       OFF

Interrupt or No Interrupt (SW7)

              SW7
 Interrupt    ON
 No Interrupt OFF

--
Paul
Monroe, Michigan USA