Register Summary
64 – Register Descriptions
VL-486-4 Reference Manual
C
OUNTER
/T
IMERS
Table 45: Counter / Timer Registers
Mnemonic
R/W
Address
Name
T0CNT
R/W
0040h
Timer 0 Count Load/Read
T1CNT
R/W
0041h
Timer 1 Count Load/Read
T2CNT
R/W
0042h
Timer 2 Count Load/Read
TCW
W
0043h
Timer Control Word
M
ISCELLANEOUS
Table 46: Miscellaneous PC/AT-Style Registers
Mnemonic
R/W
Address
Name
CSP
R/W
0061h
Control/Status Port
RTCIDX
W
0070h
Real Time Clock Index and NMI Mask
RTCDP
R/W
0071h
Real Time Clock Data Port
CIO C
HIP
Table 47: CIO Registers
Mnemonic
R/W
Address
Name
CIOCONTROL
R/W
00E4h
Control Port
CIOPORTA
R/W
00E5h
Port A Data Port
CIOPORTB
R/W
00E6h
Port B Data Port
CIOPORTC
R/W
00E7h
Port C Data Port
