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CHAPTER 3
MACSI HOST INTERFACE
Introduction
This chapter defines the MACSI host interface for the Interphase V/Ethernet 4221 Condor. The Condor and its MACSI
host interface are designed to be backwards compatible with the Interphase V/Ethernet 4207 Eagle MACSI host
interface. This compatibility exists to the extent that single port operation can be accomplished with virtually no
alterations to an existing Eagle driver, and full 4 port operation can be provided with minimal changes
This interface provides support for:
• Offboard IOPBs, located in host memory
• Offboard postback of completed commands
• Multiple command completions
• Offboard postback of network statistics
Typographic Convention
When defining the layout of commands and the shared memory interface between the host and the Condor controller,
three different conventions are used to specify the field offset:
Memory Address
The value in the far left column specifies an offset in bytes from the beginning of the Short I/O shared memory
space, as follows:
This is indicated by the term Addr appearing in the heading block of the table.
Command Response Block
Addr 1514131211109876543210
0x730 Command Response Status Word (CRSW)