Commodore Amiga A500 Technical Reference Manual page 238

PAUOLB PAL DESIGN SPECIFICATION
PART NO.: 380715-2 DESCRPT.: PAL BUFFER CONTROL REV.2 HElNZ ULLRICH 06-18-87
PAL BUFFER CONTROL FOR A2500 (US) FOR PRODUCTION-PCB
COMMODORE BSW
SLV1 SLV2 SLV3 SLV4 SLV5 OVR RD BA5 RESET A23 A22 CND
A21 A20 D2P A19 BERR OWN DS NCOLLIS PROC DBOE ASQ VCC
/NCOLLIS
=
SLVl*SLV2*SLV3*SLVC*SLvS
+
PROC* SLVZ*SLV3*SLV6*SLVS
+ PROC*SLVl* SLV3*SLV4*SLVS
+ PROC*SLVl *SLV2* SLV4*SLvS 5
+
PROC*SLVl*SLV2*SLV3* SLVS
+
PROC'SLVl*SLV2*SLV3*SLVC
/DZP
X.
WN*/SLVl*RD
;
DOWNSTREAM READS UPSTREAM SLAVE
+ OVII*/SLVZ*RD
#
.
11.
+ WNC/SLV3*RD
,
.
11.
+
OVN*/SLV4*RD
I - 1 1 .
+ WN*/SLVS*RD
#
-11.
+
/OUN*SLVl*SLV2*SLV3*SLV4*SLVS*/RD ;
UPSTREAM WRITES DOWNSTREAM SL
/DBOE
m
/BASe/RD *BERRfOWN
;
CPU
READS FROM S L A V E
+
/D5*RD*/ASQfBERR*OWN
;
CPU
W R I T E S TO S L A V E
+
/BAS*/RD
*BERR*/OWN*SLVl*SLVZ*SLV3*SLV4*SLV5;
DMA READS
CPU
RAM
+
/DS*RD*/ASQCBERR*/OWN*SLV1*SLV2*SLV3*SLV4*SLV5;
DMA W R I T E S TO
CPU
RAM
I F (RESET*NCOLLIS) /BERR
=
RESET
DESCRIPTION