README.md










ABSTRACT: GTSC 306A/307 Clock Support Routines



This package consists of a collection of routines which pro-
vide some basic support for the calendar clock option on the
model 306A real-time clock board for Q-bus PDP-11's manufac-
tured by the Grant Technology Division of Data Products Cor-
poration. These routines will also work with the model 307
(calendar clock only) board. Included are programs to set
and retrieve the date and time, a sample RT-11 device
handler for reading the clock registers, and an example pro-
gram that utilizes the handler to produce a running
date/time display on a VT100.

Assembly conditionals are provided to allow support for all
of the various clock options. Other conditionals are in-
cluded for systems with 50Hz line-time clocks, and for the
assembly of the "set date/time" utility as a
FORTRAN-callable subroutine.

These routines will run under both RT-11 and TSX-Plus.

File 306A.DOC contains installation and useage information
for all of the components of this package.