IBM AR-B3001, Руководство пользователя, Страница: 15 / 41

ACROSSER TECHNOLOGY
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CHAPTER 3 REGISTERS AND PROGRAMMING
3.1 REGISTERS
The AR-B3001 occupies 4 consecutive addresses in the
PC I/O address space. The base, or starting address, is
selected during the installation procedure and will
automatically fall on a four-byte boundary. These registers
of the AR-B3001 are located as follows:
Address Read Function Write Function
Base+0 EOC Status N/A
Base+1 Converted Data Control Register
Base+2 Not Used Not Used
Base+3 Not Used Not Used
Table 3-1 I/O Map
Note that all ports are 8 bits (one byte) wide and require
byte oriented read operations rather than word oriented
read operations.