Commodore Amiga A500 Technical Reference Manual page 235

PAL20L8 PAL DESIGN SPECIFICATION
PART NO.: 380715-2 DESCRPT.: PAL BUFFER CONTROL REV.2 HEINZ ULLRICH 06-18-87
PAL BUFFER CONTROL FOR A2500 (U5) FOR PRODUCTION-PCB
COMMODORE BSW
SLV1 SLV2 SLV3 SLV4 SLV5 OVR RD BAS RESET A23 A22 GND
A21 A20 D2P A19 BERR OWN DS NCOLLIS PROC DBOE ASQ VCC
/NCOLLIS = SLV1*SLV2*SLV3*SIV4*SLV5
+ PROC* SLV2*SLV3*SLV4*SLV5
+ PROC*SLV1*
+ PROC*SLV1*SLV2*
+ PROC*SLV1*SLV2*SLV3*
+ PROC*SLV1*SLV2*SLV3*SLV4
/PROC = /BAS*/A23*/A22*/A21*
+ /BAS* A23*/A22* A21*
+ /BAS* A23* A22*/A21*
+ /BAS* A23* A22* A21*/A20*/A19*RESET*OVR
+ /BAS* A23* A22* A21* A20* A19*RESET*OVR
/D2P = OWN*/SLV1*RD
+ OWN*/SLV2*RD
+ OWN*/SLV3*RD
+ OWN*/SLV4*RD
+ OWN*/SLV5*RD
+ /OWN*SLV1*SLV2*SLV3*SLV4*SLV5*/RD ; UPSTREAM WRITES DOWNSTREAM SL
/DBOE = /BAS*/RD *BERR*OWN
+ /D5*RD*/ASQ*BERR*OWN
+ /BAS*/RD *BERR*/OWN*SLV1*SLV2*SLV3*SLV4*SLV5; DMA READS CPU RAM
+ /DS*RD*/ASQ*BERR*/OWN*SLV1*SLV2*SLV3*SLV4*SLV5; DMA WRITES TO CPU RAM
IF (RESET*NCOLLIS) /BERR = RESET
DESCRIPTION
SLV3*SLV4*SLV5
SLV4*SLV5
SLV5
RESET*OVR
RESET*OVR
RESET*OVR
; DOWNSTREAM READS UPSTREAM SLAVE
; -"-
; -"-
; -"-
; -"-
; CPU READS FROM SLAVE
; CPU WRITES TO SLAVE
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