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(v13) device_buffersize determine file buffer size

This page applies to Harlequin v13.1r0 and later; and to Harlequin Core but not Harlequin MultiRIP

int32 device_buffersize ( DEVICELIST *dev);

This routine is called when a file is opened on the device. It should return the size of the buffer that the device requires for best operation. If the device_type structure has NULL in this function slot, or if the specified routine returns a number less than zero, then the DEVICESMALLBUFF flag is examined to determine the size of the buffer.

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