Specifications

Application Examples
Program Code
;
;**********************************************************
;* *
;* PROGRAMMING ABSTRACT *
;* *
;**********************************************************
;
; SHAWN SHURICK
; 6/30/88
; ZIATECH CORP.
; SAN LUIS OBISPO, CA
;
; THIS PROGRAMMING EXAMPLE IS FOR THE ZT 8809A CPU BOARD.
; IT IS INTENDED TO DEMONSTRATE THE USE OF THE 8259A
; INTERRUPT CONTROLLER TOGETHER WITH A COUNTER/TIMER.
; INITIALIZATION OF THE 8259A AND THE INTERRUPT VECTOR
; IS SHOWN, ALONG WITH INITIALIZATION OF THE COUNTER/
; TIMER 2. THE FRAMEWORK OF AN INTERRUPT SERVICE ROUTINE
; IS ALSO IMPORTANT, AND DEMONSTRATES THE USE OF THE END
; OF INTERRUPT (EOI).
;
;***********************************************************
;* *
;* SYSTEM CONFIGURATION *
;* *
;***********************************************************
;
; THE SYSTEM IS ASSUMED TO CONTAIN ONE ZT 8808A OR ZT 8809A,
; WITH STD DOS SOFTWARE INSTALLED. IN ADDITION, A
; ZT 8840 IS INSTALLED AT I/O ADDRESS E0H CONFIGURED AS
; A SLAVE INTERRUPT CONTROLLER. BE SURE NO OTHER CARDS
; THAT USE THE BACKPLANE INTERRUPT REQUEST TO THE ZT 8809A
; (STD BUS SIGNAL INTRQ*) ARE INSTALLED IN THE SYSTEM,
; SUCH AS THE ZT 8890 NETWORK CARD.
;
;***********************************************************
;* *
;* JUMPER CHANGES *
;* *
;***********************************************************
;
; THE ZT 8809A IS SHIPPED WITH THE JUMPERS ASSIGNED CORRECTLY
; FOR THIS EXAMPLE. THE ZT 8840 REQUIRES THE REMOVAL OF
; JUMPERS W1-3, TO PLACE THE BOARD AT E0H.
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