boot1.s hangs on system without keyboard controller

Pascal Dornier pdornier at
Sun Jul 20 14:39:41 PDT 2003

File: src/sys/boot/i386/boot2/boot1.s

The code to enable A20 gate will hang on "legacy free" systems without a
keyboard controller at port 60 / 64.

Suggest adding some sort of time-out to proceed anyway if expected reply
does not come within a reasonable time. Or bail immediately if FF is read.

Thanks !

Pascal Dornier

Pascal Dornier   pdornier at
Your Spec + PC Engines = Custom Embedded PC Hardware

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