AP-730 Interfacing the 82C59A to Intel 186 Family Appendix A

AP-730 Interfacing the 82C59A to Intel 186 Family
APPENDIX A
REFERENCE DESIGN TEST PROGRAM

Example A-1 is a listing of the software used to test this design. This design was tested on a modified 80C186XL/EA Evaluation Board. Any initialization code not shown was performed by the RISM firmware on the evaluation board.

You can download a copy of this file from Intel's application BBS. Using a terminal program and a modem, call 503-264- 7999 and respond to the system prompts.
Example A-1. Reference Design Test Program Listing (Sheet 1 of 7)
$MOD186
NAME _82C59_INTERFACE
PCB_BASE EQU 0FF00H
;INTERRUPT CONTROL REGISTERS
IMASK EQU PCB_BASE + 028H
I0CON EQU PCB_BASE + 038H
MPCS EQU PCB_BASE + 0A8H
PACS EQU PCB_BASE + 0A4H
LED EQU 488H ;ADDRESS OF THE LED
EOI EQU 0FF22H
MASTER_TYPE EQU 32 ;BASE TYPE OF THE MASTER ICU 
INT0_TYPE EQU MASTER_TYPE + 0 
INT1_TYPE EQU MASTER_TYPE + 1
INT2_TYPE EQU MASTER_TYPE + 2
INT3_TYPE EQU MASTER_TYPE + 3
INT4_TYPE EQU MASTER_TYPE + 4
INT5_TYPE EQU MASTER_TYPE + 5
INT6_TYPE EQU MASTER_TYPE + 6
INT7_TYPE EQU MASTER_TYPE + 7
;PCS BASE ADDRESS AT 3FFH (DETERMINED BY iRISM CODE)
PCS4 EQU 600H ;LOWER BOUNDARY OF PCS4
EXT_PIC_P0 EQU PCS4 ;INTERRUPT CONTROL REGISTER
EXT_PIC_P1 EQU PCS4+2 ;INTERRUPT CONTROL REGISTER
PCSVAL_MSK EQU 03H ;CHIP SELECT VALUE WITH 3 WAIT STATES
CODE SEGMENT AT 0100H
 ASSUME CS:CODE
MAIN: CLI ;DISABLE INTERRUPTS
 CALL INITPCS ;INITIALIZE THE PERIPHERAL CHIP SELECT
 CALL INITVECT ;INITIALIZE THE INTERRUPT VECTOR TABLE
 CALL INITICU ;INITIALIZE THE INTERRUPT CONTROL UNIT 
 STI ;ENABLE INTERRUPTS
 JMP $ ;WAIT FOR INTERRUPT TO OCCUR
;********************************************************************************
;INITIALIZES THE TIMER0 INTERRUPT VECTOR LOCATION
INITVECT PROC
 XOR AX, AX ;CLEARS THE ACCUMULATOR
 MOV DS, AX ;CLEARS THE DATA SEGMENT
;INITIALIZE THE INTERRUPT VECTOR
 MOV DI, INT0_TYPE*4 ;MOVE INTERRUPT VECTOR LOC INTO DI
 MOV WORD PTR DS:[DI], OFFSET ISR0 ;POINTER TO THE CS LOCATION IN THE TABLE
 MOV WORD PTR DS:[DI+2], SEG ISR0 ;POINTER TO THE IP LOCATION IN THE TABLE
 MOV DI, INT1_TYPE*4 ;MOVE INTERRUPT VECTOR LOC INTO DI
 MOV WORD PTR DS:[DI], OFFSET ISR1 ;POINTER TO THE CS LOCATION IN THE TABLE
 MOV WORD PTR DS:[DI+2], SEG ISR1 ;POINTER TO THE IP LOCATION IN THE TABLE
 MOV DI, INT2_TYPE*4 ;MOVE INTERRUPT VECTOR LOC INTO DI
 MOV WORD PTR DS:[DI], OFFSET ISR2 ;POINTER TO THE CS LOCATION IN THE TABLE
 MOV WORD PTR DS:[DI+2], SEG ISR2 ;POINTER TO THE IP LOCATION IN THE TABLE
 MOV DI, INT3_TYPE*4 ;MOVE INTERRUPT VECTOR LOC INTO DI
 MOV WORD PTR DS:[DI], OFFSET ISR3 ;POINTER TO THE CS LOCATION IN THE TABLE
 MOV WORD PTR DS:[DI+2], SEG ISR3 ;POINTER TO THE IP LOCATION IN THE TABLE
 MOV DI, INT4_TYPE*4 ;MOVE INTERRUPT VECTOR LOC INTO DI
 MOV WORD PTR DS:[DI], OFFSET ISR4 ;POINTER TO THE CS LOCATION IN THE TABLE
 MOV WORD PTR DS:[DI+2], SEG ISR4 ;POINTER TO THE IP LOCATION IN THE TABLE
 MOV DI, INT5_TYPE*4 ;MOVE INTERRUPT VECTOR LOC INTO DI
 MOV WORD PTR DS:[DI], OFFSET ISR5 ;POINTER TO THE CS LOCATION IN THE TABLE
 MOV WORD PTR DS:[DI+2], SEG ISR5 ;POINTER TO THE IP LOCATION IN THE TABLE
 MOV DI, INT6_TYPE*4 ;MOVE INTERRUPT VECTOR LOC INTO DI
 MOV WORD PTR DS:[DI], OFFSET ISR6 ;POINTER TO THE CS LOCATION IN THE TABLE
 MOV WORD PTR DS:[DI+2], SEG ISR6 ;POINTER TO THE IP LOCATION IN THE TABLE
 MOV DI, INT7_TYPE*4 ;MOVE INTERRUPT VECTOR LOC INTO DI
 MOV WORD PTR DS:[DI], OFFSET ISR7 ;POINTER TO THE CS LOCATION IN THE TABLE
 MOV WORD PTR DS:[DI+2], SEG ISR7 ;POINTER TO THE IP LOCATION IN THE TABLE
 RET
INITVECT ENDP
;********************************************************************************
ISR0 PROC
;NOTE THAT AN EOI HAS TO BE ISSUED FOR BOTH THE 82C59A-2 AND THE 80C186XL's
;INTERNAL INTERRUPT CONTROL UNIT
 MOV DX, LED ;TURN ON THE LED
 MOV AL, 0FEH
 OUT DX, AL 
 MOV DX, EXT_PIC_P0 ;ISSUE NON-SPECIFIC EOI FOR 82C59A-2
 MOV AL, 20H
 OUT DX, AL
 MOV DX, EOI ;ISSUE NON-SPECIFIC EOI FOR 80C186XL
 MOV AX, 8000H
 OUT DX, AX
 IRET ;RETURN FROM INTERRUPT SERVICE ROUTINE
ISR0 ENDP
;********************************************************************************
ISR1 PROC
 MOV DX, LED ;TURN ON THE LED
 MOV AL, 0FDH 
 OUT DX, AL 
 MOV DX, EXT_PIC_P0 ;ISSUE NON-SPECIFIC EOI FOR 82C59A-2
 MOV AL, 20H
 OUT DX, AL
 MOV DX, EOI ;ISSUE NON-SPECIFIC EOI FOR 80C186XL
 MOV AX, 8000H
 OUT DX, AX
 IRET ;RETURN FROM INTERRUPT SERVICE ROUTINE
ISR1 ENDP
;********************************************************************************
ISR2 PROC
 MOV DX, LED ;TURN ON THE LED
 MOV AL, 0FBH 
 OUT DX, AL 
 MOV DX, EXT_PIC_P0 ;ISSUE NON-SPECIFIC EOI FOR 82C59A-2
 MOV AL, 20H
 OUT DX, AL
 MOV DX, EOI ;ISSUE NON-SPECIFIC EOI FOR 80C186XL
 MOV AX, 8000H
 OUT DX, AX
 IRET ;RETURN FROM INTERRUPT SERVICE ROUTINE
ISR2 ENDP
;********************************************************************************
ISR3 PROC
 MOV DX, LED ;TURN ON THE LED
 MOV AL, 0F7H 
 OUT DX, AL 
 MOV DX, EXT_PIC_P0 ;ISSUE NON-SPECIFIC EOI FOR 82C59A-2
 MOV AL, 20H
 OUT DX, AL
 MOV DX, EOI ;ISSUE NON-SPECIFIC EOI FOR 80C186XL
 MOV AX, 8000H
 OUT DX, AX
 IRET ;RETURN FROM INTERRUPT SERVICE ROUTINE
ISR3 ENDP
;********************************************************************************
ISR4 PROC
 MOV DX, LED ;TURN ON THE LED
 MOV AL, 0EFH 
 OUT DX, AL 
 MOV DX, EXT_PIC_P0 ;ISSUE NON-SPECIFIC EOI FOR 82C59A-2
 MOV AL, 20H
 OUT DX, AL
 MOV DX, EOI ;ISSUE NON-SPECIFIC EOI FOR 80C186XL
 MOV AX, 8000H
 OUT DX, AX
 IRET ;RETURN FROM INTERRUPT SERVICE ROUTINE
ISR4 ENDP
;********************************************************************************
ISR5 PROC
 MOV DX, LED ;TURN ON THE LED
 MOV AL, 0DFH 
 OUT DX, AL 
 MOV DX, EXT_PIC_P0 ;ISSUE NON-SPECIFIC EOI FOR 82C59A-2
 MOV AL, 20H
 OUT DX, AL
 MOV DX, EOI ;ISSUE NON-SPECIFIC EOI FOR 80C186XL
 MOV AX, 8000H
 OUT DX, AX
 IRET ;RETURN FROM INTERRUPT SERVICE ROUTINE
ISR5 ENDP
;********************************************************************************
ISR6 PROC
 MOV DX, LED ;TURN ON THE LED
 MOV AL, 0BFH 
 OUT DX, AL 
 MOV DX, EXT_PIC_P0 ;ISSUE NON-SPECIFIC EOI FOR 82C59A-2
 MOV AL, 20H
 OUT DX, AL
 MOV DX, EOI ;ISSUE NON-SPECIFIC EOI FOR 80C186XL
 MOV AX, 8000H
 OUT DX, AX
 IRET ;RETURN FROM INTERRUPT SERVICE ROUTINE 
ISR6 ENDP
;********************************************************************************
ISR7 PROC
 MOV DX, LED ;TURN ON THE LED
 MOV AL, 7FH 
 OUT DX, AL 
 MOV DX, EXT_PIC_P0 ;ISSUE NON-SPECIFIC EOI FOR 82C59A-2
 MOV AL, 20H
 OUT DX, AL
 MOV DX, EOI ;ISSUE NON-SPECIFIC EOI FOR 80C186XL
 MOV AX, 8000H
 OUT DX, AX
 IRET ;RETURN FROM INTERRUPT SERVICE ROUTINE
ISR7 ENDP
;********************************************************************************
INITICU PROC
;SETTING UP INTERNAL INTERRUPT CONTROLLER REGISTER FOR CASCADE MODE
 MOV DX, I0CON ;INITIALIZE INTERRUPT 0 FOR CASCADING
 MOV AX, 0030H ;SET CASCADE BIT, MAKE INT0 THE HIGHEST PRIORITY
 OUT DX, AX ;INITIALIZE TO CASCADE MODE
;INITIALIZING THE MASTER CONTROLLER
 MOV DX, EXT_PIC_P0 ;INITIALIZATION COMMAND WORD 1 FOR THE SLAVE
 MOV AL, 13H ;SET BIT TO INDICATE IT IS THE ONLY 8259
 ;IN THE SYSTEM
 OUT DX, AL ;MOVE VALUE 
 MOV DX, EXT_PIC_P1 ;INITIALIZATION COMMAND WORD 2 FOR THE MASTER
 MOV AL, MASTER_TYPE ;SET UP THE MASTER BASE TYPE ---------------
 OUT DX, AL 
 MOV DX, EXT_PIC_P1 ;INITIALIZATION COMMAND WORD 4 FOR THE MASTER
 MOV AL, 01H ;8086 MODE, NO SFNM, NO AEOI, NO BUF
 OUT DX, AL
 MOV DX, EXT_PIC_P1 ;SETTING THE OPERATION COMMAND WORD 1 (MASK REG)
 MOV AL, 00H ;UNMASK ALL OF THE INTERRUPT ON THE EXTERNAL MASTER
 OUT DX, AL ;SET THE MASK REGISTER 
 MOV DX, IMASK ;UNMASK ONLY INT0
 MOV AX, 00EDH ;CLEAR ONLY INTERRUPT 0
 OUT DX, AX ;MASK ALL INTERRUPTS BUT INT0
 RET ;RETURN FROM PROCEDURE
INITICU ENDP 
;*******************************************************************************
INITPCS PROC
 MOV DX, MPCS ;INITIALIZE THE CHIP SELECT
 IN AX, DX
 OR AX, PCSVAL_MSK ;CHIP SELECT VALUE WITH 3 WAIT STATES
 OUT DX, AX
 RET ;RETURN FROM PROCEDURE
INITPCS ENDP 
;********************************************************************************
CODE ENDS
 END MAIN