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FinalU5.pld
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1992-06-29
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900b
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57 lines
PARTNO U5 ;
NAME Finalu5 ;
REV 04 ;
DATE May 23rd, 1988 ;
DESIGNER Brad Fowles ;
COMPANY Anakin ;
ASSEMBLY Lucas ;
LOCATION U5 ;
/* PAL16R4B2 */
/* PAL DESIGN SPECIFICATION */
/* 68020-68881 /68000 AMIGA INTERFACE */
PIN 1 = 7M ;
PIN 2 = VPA ;
PIN 3 = AS20DLY ;
PIN 4 = QA ;
PIN 5 = QB ;
PIN 6 = QC ;
PIN 7 = QD ;
PIN 8 = BGACK ;
PIN 9 = BG20 ;
PIN 12 = AS00 ;
PIN 13 = HIGHZ ;
PIN 14 = Z2;
PIN 15 = BGACK2 ;
PIN 16 = BGACK1 ;
PIN 17 = VMA ;
PIN 18 = AS20 ;
PIN 19 = BG00 ;
HIGHZ = (BGACK2 ) & (!AS20DLY )#
(BGACK2 ) & ( BG20 );
!BG00 = (!BG20 )& (!Z2 )& (AS20 );
!BGACK1.D = !BGACK ;
!BGACK2.D = !BGACK1 ;
!Z2.D = (!AS00 )#
( AS20 );
!VMA.D = (!QD ) & (!QC ) & (QB ) & (QA ) & (!VPA )#
(!VMA ) & ( QD )#
(!VMA ) & ( QC );
/*
DESCRIPTION: BUS ARBITRATION LOGIC AND VMA GENERATION
*/