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dsr_sources_2_2001
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gpl20
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2006-10-19
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106 lines
GPL20 ANDI R12,>FF00
AI R12,24
LDCR @ZERO,4
LI R0,STINIT
MOV R0,@STACK
* If we're doing a write, we have to invalidate the cache
MOVB @>834C,R6
ANDI R6,>0F00
AI R6,>FF00
CB @>834D,@ZERO
JNE GPL2BB
LDCR @B04,4 Select RAM bank 4
LI R4,DNCASH
GPL20A CB *R4,R6
JNE GPL20B
CLR *R4
GPL20B AI R4,48
CI R4,>5FFE-48
JL GPL20A
GPL2BB LDCR @ZERO,4 Select RAM bank 0
MOVB @>834C,R1
ANDI R1,>4000
JEQ GPL20C
SB @B01,@>834C
BLWP @BANKIT
DATA SCSI20
INCT R11
ANDI R12,>FF00
RT
GPL20C LI R1,SECBUF
MOV @>8350,R8
MOV @>8352,R7
SRL R8,1
JNC GPL20D
AI R1,>0100
GPL20D SRL R7,1
JNC GPL20E
ORI R8,>8000
GPL20E LI R0,256
MOV @>834E,R3 Get buffer location
MOVB @>834D,R2 Check for read/write
JEQ GPL20I
BLWP @BANKIT
DATA SCSIRD
MOVB @>834C,R2 Check buffer location
ANDI R2,>8000
JEQ GPL20G
GPL20F MOVB *R1+,*R3+
DEC R0
JNE GPL20F
ANDI R12,>FF00
INCT R11
RT
GPL20G ANDI R3,>8000
SWPB R3
MOVB R3,@VDPWA
SWPB R3
MOVB R3,@VDPWA
NOP
GPL20H MOVB *R1+,@VDPWD
DEC R0
JNE GPL20H
ANDI R12,>FF00
INCT R11
RT
GPL20I
BLWP @BANKIT
DATA SCSIRD
MOVB @>834C,R2 Check buffer location
ANDI R2,>8000
JEQ GPL20K
GPL20J MOVB *R3+,*R1+
DEC R0
JNE GPL20J
BLWP @BANKIT
DATA SCSIWT
ANDI R12,>FF00
INCT R11
RT
GPL20K SWPB R3
MOVB R3,@VDPWA
SWPB R3
MOVB R3,@VDPWA
NOP
GPL20L MOVB @VDPRD,*R1+
DEC R0
JNE GPL20L
BLWP @BANKIT
DATA SCSIWT
ANDI R12,>FF00
INCT R11
RT