Commodore Amiga A500 Technical Reference Manual page 236

PAL16R6
PART NO.: DESCRPT.:PAL ARBITRATE A2500 REV.1 FRANK ULLMANN 05-22-86
PAL ARBITRATE FOR A2500 (U ) FOR PRODUCTION-PCB
COMMODORE BSW
7M BAS RES BGIN BR5 BR4 BR3 BR2 BR1 GND
NC BASD BGOLD BG5 BG4 BG3 BG2 BG1 BR VCC
/BG1 = RES*/BGIN*BG0LD*/BR1
+ RES*/BGIN*/BG1
/BG2 = RES*/BGIN*BGOLD*/BR2*BR1
+ RES*/BGIN*/BG2
/BG3 = RES*/BGlN*BG0LD*/BR3*BR1l*BR2
+ RES*/BGIN*/BG3
/BG4 = RES*/BGIN*BGOL0*/BR4*BR1*BR2*BR3
+ RES*/BGIN*/BG4
/BG5 = RES*/BGIN*BGOLD*/BR5*BR1*BR2*BR3*BR4
+ RES*/BGIN*/BG5
/BGOLD = /BGIN
/BR = RES*/BR5
+ RES*/BR1
+ RES*/BR2
+ RES*/BR3
+ RES*/BR4
/BASD = BAS
DESCRIPTION
BG1 IS HIGHEST PRIORITY
PAL DESIGN SPECIFICATION
; GENERATE BG1
;HOLD UNTIL /BG
; STORE OLD STATE OF BG
; BR IS REQUEST TO 68K
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