68K Interrupt controller, PAL16R4

logic equations and fuse map

PAL16R4	 PAL DESIGN SPECIFICATIONS
INTA.DAT	DANESH TAVANA
INTERRUPT CONTROLLER
MMI SUNNYVALE, CA
CLK /INT7 /INT6 /INT5 /INT4 /INT3 /INT2 /INT1  /AS GND
/OC  FCO   FC1    NC  /IPLO /IPL1 /IPL2 /DTACK FC2 VCC

IF (FC2* FC1* FCO* AS) DTACK = VCC	;ASSERT IF OUTPUT ENABLE

IPL2 :=  INT7	;PRIORITY ENCODED BIT
      + /INT7* INT6
      + /INT7*/INT6* INT5
      + /INT7*/INT6*/INT5* INT4

IPL1 :=  INT7	;PRIORITY ENCODED BIT
      + /INT7* INT6
      + /INT7*/INT6*/INT5*/INT4* INT3
      + /INT7*/INT6*/INT5*/INT4*/INT3* INT2

IPL0 :=  INT7	;PRIORITY ENCODED BIT
      + /INT7*/INT6* INT5
      + /INT7*/INT6*/INT5*/INT4* INT3
      + /INT7*/INT6*/INT5*/INT4*/INT3%/INT2* INT1

FUNCTION TABLE

CLK /INT7 /INT6 /INT5 /INT4 /INT3 /INT2 /INT1 FC2 FC1 FCO /AS /IPL2 /IPL1 /IPLO /DTACK

;                                      D
;   / / / / / / /               / / /  T
;C  N N N N N N N    F F F /    P P P  A 
;L  T T T T T T T    C C C A    L L L  C
;K  7 6 5 4 3 2 1    2 1 0 S    2 1 0  K	COMMENTS

C  L X X X X X X    H H H L    L L L  L	ASSERT /DTACK
C  H L X X X X X    H H H H    L L H  Z	INTERRUPT LEVEL 7
C  H H L X X X X    L L H L    L H L  Z	INTERRUPT LEVEL 6
C  H H H L X X X    L H L L    L H H  Z	INTERRUPT LEVEL 5
C  H H H H L X X    L H H L    H L L  Z	INTERRUPT LEVEL 4
C  H H H H H L X    H L L L    H L H  Z	INTERRUPT LEVEL 3
C  H H H H H H L    H L H L    H H L  Z	INTERRUPT LEVEL 2
C  H H H H H H H    H H L L    H H H  Z	INTERRUPT LEVEL 1