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Programming Issues
1
PCCchip2 Base Address = $FFF42000
OFFSET:
D31
00
04
08
0C
10
14
GPI
18
PLTY
1C
20
24
28
2C
PRTR
30
ACK
PLTY
PRTR
34
BSY
PLTY
38
3C
SCC PROVIDES ITS OWN VECTORS
1-32
Table 1-7. PCCchip2 Memory Map
CHIP ID
PRESCALER COUNT REGISTER
GPI
GPI
GPI
GPI
E/L*
INT
IEN
ICLR
SCC
SCC
SCC
RTRY
PAR
EXT
ERR
ERR
ERR
LAN
LAN
PAR
EXT
ERR
ERR
SCSI
SCSI
PAR
EXT
ERR
ERR
PRTR
PRTR
PRTR
PRTR
ACK
ACK
ACK
ACK
E/L*
INT
IEN
ICLR
PRTR
PRTR
PRTR
PRTR
BSY
BSY
BSY
BSY
E/L*
INT
IEN
ICLR
D24
D23
PRESCALER CLOCK ADJUST
GPI
IRQ LEVEL
SCC
SCC
SCC
LTO
SCLR
MDM
ERR
ERR
LAN
LAN
LTO
SCLR
ERR
SCSI
SCSI
LTO
SCLR
ERR
PRTR
PRTR
PRTR
PRTR ACK
FLT
FLT
IRQ LEVEL
PLTY
E/L*
PRTR BSY
IRQ LEVEL
CHIP SPEED
This sheet continues on facing page.
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CHIP REVISION
TIC TIMER 1
TIC TIMER 1
TIC TIMER 2
TIC TIMER 2
GPI
GPOE
SCC
SCC
SCC MODEM
MDM
MDM
IRQ LEVEL
IEN
AVEC
SCC TRANSMIT PIACK
PRTR
PRTR
PRTR FAULT
FLT
FLT
FLT
IRQ LEVEL
INT
IEN
ICLR
D16
GPO
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