CPI(4)

NAME
cpi - parallel printer driver for Creative Systems Inc. Hurdler CPI Nubus card

SYNOPSIS
cpi* at nubus? flags 0x1

DESCRIPTION
The cpi interface provides access to parallel printer ports.

CONFIGURATION
The cpi driver supports the following flags for use in config(1) files:

bit 0:
    use the CIO counters 1 and 2 as a 32 bit timecounter(9).

HARDWARE
The cpi interface supports the Creative Systems Inc. Hurdler CPI Nubus card, which is based on a Zilog Z8536 CIO.

The parallel port on the Hurdler CPI card is wired as follows:
Signal SubD pin Z8536 pin Z8536 signal
/STROBE Strobe 1 22 PC3
D0 2 33 PA0
D1 3 32 PA1
D2 4 31 PA2
D3 5 30 PA3
D4 6 29 PA4
D5 7 28 PA5
D6 8 27 PA6
D7 9 26 PA7
/ACK 10 21 + 11 PC2 + PB3
BUSY 11 19 + 14 PC0 + PB6
PE Paper Error 12 20 PC1
SEL Select 13 13 PB5
/AUTOFD Auto Feed 14 12 PB4
/FAULT 15 9 PB1
/RESET 16 8 PB0
/SELIN Select <17> 10 PB2

The Z8536 INT line (pin 24) is wired to PB7 (pin 15).

SEE ALSO
lpt(4), mac68k/autoconf(4), nubus(4), printcap(5), timecounter(9)

IEEE Standard 1284-1994

HISTORY
cpi first appeared in NetBSD 5.0.

AUTHORS
The cpi driver was written by Hauke Fath <hauke@NetBSD.org>.

CAVEATS
The Hurdler CPI Nubus card does not use a TTL buffer to drive the parallel interface. Instead, the card's Z8536 CIO drives the printer port directly. Printers terminating the parallel interface with less than 2 kOhms may cause permanent damage to the Z8536 CIO.