PAL16H2                                    PAL DESIGN SPECIFICATION
P7033                                      DICK JONES      07/07/81
MEMORY MAPPED PRINTER DECODER
MMI FIELD APPLICATIONS ENGINEER LOMBARD, ILLINOIS
A15 A14 A13 A12 A11 A10 A9 A8 A7 GND
A6 A5 A3 A2 WRITE READ /RAS /RD /WR VCC

WRITE = /A15*/A14*A13*A12*/A11*A10*A9*A8*A7*A6*A5*A3*/A2*RAS*WR

 READ = /A15*/A14*A13*A12*/A11*A10*A9*A8*A7*A6*A5*A3*/A2*RAS*RD


FUNCTION TABLE

A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A3 A2 RAS RD WR WRITE READ

;AAAA AAAA AAA AA RRW    WR
;1111 1198 765 32 ADR    RE
;5432 10          S      IA
;                        TD
;                        E       COMMENTS
-----------------------------------------------------
 LLHH LHHH HHH HL HLH    HL      WRITE WHEN 37E8 HEX
 LLHH LHHH HHH HL HHL    LH      READ WHEN 37E8 HEX
 XXXX XXXX XXX XX LXX    LL      RAS NOT PRESENT
 XXXX XXXX XXX XX HLL    LL      NOT READ OR WRITE
-----------------------------------------------------


DESCRIPTION

THIS IS A MEMORY DECODER FOR A PRINTER.  THE PRINTER
IS MAPPED TO HEX ADDRESS 37E8.  THE WRITE OR READ LINES
GO HIGH WHEN ADDRESS LINES ARE CORRECT AND A WRITE OR
READ STROBE RESPECTIVELY IS PRESENT.

THIS IS THE FIRST IC OF A 2-PAL PRINTER INTERFACE FOR
THE STANDARD CENTRONICS-TYPE PRINTER.