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3-3 CIO (Core I/O) Area
CIO Area addresses run from words CIO 0000 through CIO 2555 and bits
CIO 000000 through CIO 255515 and are divided into eight data areas. Five
of these data areas are used to control I/O points and Special Units, and
three data areas are used to manipulate and store data internally. The CIO
Area is accessible either by bit or by word. No prefix is required when input-
ting data area addresses; the CIO prefix is used only for clarity in descrip-
tions.
The name, range, and function of each data area within the CIO Area are sum-
marized in the following table. PC memory addresses are in parentheses.
Area PC Range Function
I/O Area CV500
CVM1-CPU01-EV2
Words: CIO 0000 to CIO 0031
Bits: CIO 000000 to CIO 003115
($0000 to $001F)
Allocated to I/O in the System and used to
control I/O points. Bits not used to control
I/O points can be used as work bits. The PC
CV1000
CVM1-CPU11-EV2
Words: CIO 0000 to CIO 0063
Bits: CIO 000000 to CIO 006315
($0000 to $003F)
Setup can be used to control allocations.
Once I/O table has been registered, input
bits are displayed on CVSS/SSS with an I;
CV2000
CVM1-CPU21-EV2
Words: CIO 0000 to CIO 0127
Bits: CIO 000000 to CIO 012715
($0000 to $007F)
output bits, with a Q.
Work Area CV500
CVM1-CPU01-EV2
Words: CIO 0032 to CIO 0199
Bits: CIO 003200 to CIO 019915
($0020 to $00C7)
These bits are used in the program to
manipulate or to temporarily store data.
CV1000
CVM1-CPU11-EV2
Words: CIO 0064 to CIO 0199
Bits: CIO 006400 to CIO 019915
($0040 to $00C7)
CV2000
CVM1-CPU21-EV2
Words: CIO 0128 to CIO 0199
Bits: CIO 012800 to CIO 019915
($0080 to $00C7)
SYSMAC
BUS/2
Area
CV500/
CVM1-CPU01-EV2
Words: CIO 0200 to CIO 0599
Bits: CIO 020000 to CIO 059915
($00C8 to $0257)
These bits are used for remote I/O points in
the SYSMAC BUS/2 Remote I/O System
unless the default allocations are changed in
the PC Setup.
CV1000/CV2000/
CVM1-CPU11-EV2
Words: CIO 0200 to CIO 0999
Bits: CIO 020000 to CIO 099915
($00C8 to $03E7)
Bits not used to control I/O points can be
used as work bits.
Link Area All Words: CIO 1000 to CIO 1199
Bits: CIO 100000 to CIO 119915
($03E8 to $04AF)
These bits are used for SYSMAC NET Link
and SYSMAC LINK Systems. Bits not used
for data links can be used as work bits.
These bits can be set as holding bits via PC
Setup.
Holding
Area
All Words: CIO 1200 to CIO 1499
Bits: CIO 120000 to CIO 149915
($04B0 to $05DB)
Used to store data and to retain the data
values when the power is turned off.
CPU Bus
Unit Area
All Words: CIO 1500 to CIO 1899
Bits: CIO 150000 to CIO 189915
($05DC to $076B)
Used to store the operating status of CPU
Bus Units. Bits not used by CPU Bus Units
can be used as work bits. These bits can be
set as holding bits via the PC Setup.
CompoBus
/D Areas
All Words: CIO 1900 to CIO 1963
Bits: CIO 190000 to CIO 196315
($076C to $0AB)
Words: CIO 2000 to CIO 2063
Bits: CIO 200000 to CIO 206315
($07D0 to $080F)
These bits are used in CompoBus/D
networks. Bits not used for CompoBus/D
can be used as work bits.
CIO (Core I/O) Area Section 3-3
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