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
-11.
+
WN*/SLVS*RD
#
-11.
+
/OUN*SLVl*SLV2*SLV3*SLV4*SLVS*/RD
;
UPSTREAM WRITES DOWNSTREAM SL
/DBOE
m
/BASe/RD *BERRfOWN
;
CPU
READS FROM SLAVE
+
/D5*RD*/ASQfBERR*OWN
;
CPU
WRITES TO SLAVE
+
/BAS*/RD
*BERR*/OWN*SLVl*SLVZ*SLV3*SLV4*SLV5;
DMA READS
CPU
RAM
+
/DS*RD*/ASQCBERR*/OWN*SLV1*SLV2*SLV3*SLV4*SLV5;
DMA WRITES TO
CPU
RAM
IF
(RESET*NCOLLIS) /BERR
=
RESET
DESCRIPTION
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