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286 back to Real-Mode sources? #15

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fabiensanglard opened this issue Oct 25, 2022 · 0 comments
Open

286 back to Real-Mode sources? #15

fabiensanglard opened this issue Oct 25, 2022 · 0 comments

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@fabiensanglard
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"Various tricks had to be used, among them faking a keyboard Ctrl-Alt-Del reboot to reset the CPU without actually rebooting." The keyboard controller (really a microcontroller) on the system board was used to reset the CPU directly, by generating a RESET signal. Please remove the bit about Ctrl-Alt-Del unless you can show at least one piece of software which actually did that. The keyboard controller reset was designed in, because the PC/AT BIOS itself needed to switch to protected mode and back when testing extended memory.

"Various tricks had to be used, among them using the keyboard controller to reset the CPU without actually rebooting."
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