MB88305 expander equivalent, nmos input / output expander.
* Four 4-bit I/O ports (16 lines)
* Four Functions: parallel input, parallel output, AND output, and OR output
* AND and OR functions provide individual outpu.
The MB 88304/88305 have two interfaces: One is the processor interface; C$, LDI, and DI3-DI0, which are used for the processor to communicate with the MB 88304/5 devices. Another is the expansion I/O ports; Ports A, B, C, and D, which serve as an ex.
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