# AC5 Series

The AC5 Series includes the following hardware:

- CIO-DUAL-AC5
- PCI-DUAL-AC5
- PCI-QUAD-AC5
- PC104-AC5

The AC5 Series supports the following UL and UL for .NET features.

## Digital I/O

Click here to display a table of the port numbers and corresponding bit numbers that are set by the digital I/O functions for hardware designed with the 82C55 chip or 82C55 emulation.

Functions

UL: cbDOut(), cbDIn(), cbDBitIn(), cbDBitOut(), cbDConfigPort()

UL for .NET: DOut(), DIn(), DBitIn(), DBitOut(), DConfigPort()

PortNum

FIRSTPORTA, FIRSTPORTB, FIRSTPORTCL, FIRSTPORTCH

DataValue

0 to 255 using FIRSTPORTA or FIRSTPORTB

0 to 15 using FIRSTPORTCL or FIRSTPORTCH

BitNum

0 to 23 using FIRSTPORTA

PortNum

DUAL-AC5 and QUAD-AC5 boards also support:

SECONDPORTA, SECONDPORTB, SECONDPORTCL, SECONDPORTCH

DataValue

0 to 255 using SECONDPORTA or SECONDPORTB

0 to 15 using SECONDPORTCL or SECONDPORTCH

BitNum

0 to 47 using FIRSTPORTA

PortNum

QUAD-AC5 boards also support:

THIRDPORTA, THIRDPORTB, THIRDPORTCL, THIRDPORTCH, FOURTHPORTA, FOURTHPORTB, FOURTHPORTCL, FOURTHPORTCH

DataValue

0 to 255 using THIRDPORTA or THIRDPORTB

0 to 15 using THIRDPORTCL or THIRDPORTCH

BitNum

0 to 95 using FIRSTPORTA