Portable computer apparatus having a display capable of displayi

Details Portable computer apparatus having a display capable of displayi Portable computer apparatus having a display capable of displayi

1994-06-24

1997-06-17

Auve, Glenn A.

Telegraphy

Systems

Printing

178 87, G06F 128

Patent

active

056405740

ABSTRACT:
In a portable computer apparatus, if an operation mode, designated by an input operation of a mode change switch 4 of a pen device, is changed from a user program mode to a power management mode when a program using data in a user program area of the VRAM is executed by the main CPU, power management data is developed while a first arbiter arbitrates between access from a display control section and a main CPU to a VRAM, and while a second arbiter 8 arbitrates access from a sub CPU to a power management area of the VRAM.

REFERENCES:
patent: 4984185 (1991-01-01), Saito
patent: 5133076 (1992-07-01), Hawkins et al.
patent: 5167024 (1992-11-01), Smith et al.
patent: 5241303 (1993-08-01), Register et al.
patent: 5341503 (1994-08-01), Gladstein et al.
patent: 5423045 (1995-06-01), Kannan et al.

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