z8530_status
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## Name

z8530_status — Handle a PIO status exception

## Synopsis

`void z8530_status (` | struct z8530_channel * chan`)`;

## Arguments

`chan`

  Z8530 channel to process

## Description

A status event occurred in PIO synchronous mode. There are several reasons the chip will bother us here. A transmit underrun means we failed to feed the chip fast enough and just broke a packet. A DCD change is a line up or down.

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