1. Introduction

This technical note concentrates upon (1) the HOST-HOST procedures and (2) the implementation of the corresponding programs in GORDO (Operating System of the UCLA HOST).

The first section is closely related to the BBN reports No. 1822 and 1763[1] and specifies the HOST functions for exchanging messages. It mostly deals with links and connections, message structure, transactions, and control messages.

The second section is software oriented; it explains how the HOST functions are implemented and integrated into GORDO. It is involved with data structures, programs, buffers, interrupt processing, etc.

[1] Parts of this section are taken from or referred to those reports.