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Information Panel

IP.com Disclosure Number: IPCOM000101496D
Original Publication Date: 1990-Aug-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

Dang, TT: AUTHOR

Abstract

This article describes a means through a light-emitting diode (LED) display panel to monitor progress of power-on self-test (POST) to increase usability and provide greater feedback to the user.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 64% of the total text.

Information Panel

       This article describes a means through a light-emitting
diode (LED) display panel to monitor progress of power-on self-test
(POST) to increase usability and provide greater feedback to the
user.

      The information panel of this disclosure is shown in block
diagram form in Figure 1.  It is partitioned into three functional
parts as follows:
1.   Alpha-numeric display.
2.   Power control unit.
3.   Speaker assembly.

      During POST, the alpha-numeric display will be used as the main
means of displaying checkpoints or error codes when there is a system
failure.  This feature is not only user friendly but also practical
to the users and repair personnel.

      The alpha-numeric display's data input is gated by a signal
called "-CS LED" on the planar.  This signal is decoded from an I/O
Write to address 108 Hex through 10F Hex.  108 Hex is assigned to the
rightmost position, and 10F Hex is the leftmost position on the
display.  In addition, -Write Low and -Write High are signals
generated from the planar logic to select the lower four positions
and the higher four positions of the display, respectively.

      Figure 2 is a power switch truth table.  Two subminiature push-
button switches are used as a secondary power-on switch.  SW1 is the
remote initial program load (IPL) switch, and SW2 is the main power
on/off switch.  When SW2 is on, Power On Sense signal will be
grounded and the power supply will be turned...