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HP-UX I/O
HP9000/S800 CIO Gpio Monolith
Version 0.1
Printed: August 28t 1989
Susan Dedo
General Systems Division '
HP -UX Software Operation
HP-UX Kernel Lab
Preface
The purpose of this specification is to define the outward appearance and the internal
workings of the gpio monolith (gpioO) for the Series 800 CIO based machines. This driver
controls the 27114B CIO AFI card as well as the 27114A CIO AFI card.
I assume that the reader understands both the I/O system and the AFI card. To acquire
this background, the following is recommended reading: