The PC10466 Series of NIMs has no drop-in replacement. This series used the COM90C66 ARCNET controller chip that is no longer available.

For users willing and able to modify their application-layer software, the PC10422 Series could possibly substitute in some cases. The PC10422 uses the COM20022 ARCNET controller chip instead of the COM90C66 that was used on PC10466 NIMs. Due to the differences in the controller chips, if a PC10422 is substituted for a PC10466, the ARCNET functionality will change in the following ways.

• Memory mapping can no longer be used for data operations because the COM20022 transfers data through its I/O space.
• 16-bit data operations are not supported by our drivers, but the PC10422 is capable of 16-bit operation for those wishing to write their own drivers.

The PC10422 Series has null-stack drivers available for Windows NT/95/98/ME/2000/XP. More software information for PC10422 NIMs is available at:

• www.arccontrol.com/pc1042x_software.htm

Programmer guides and sample applications are included in any of the free downloads at:

• www.arccontrol.com/pc1042x_drivers.htm

PC10422 NIMs provide the same transceiver options as PC10466 NIMs except that fiber ports are no longer supported. If you need fiber connectivity for a PC10422 NIM, you should use an AI Series hub for the media conversion.