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November 2024

Grandpa, Tell Me The Story Again About The A20 Gate

Grandpa, Tell Me The Story Again About The A20 Gate
Grandpa, Tell Me The Story Again About The A20 Gate

After my previous article on the keyboard controller interface , there was a global public outcry (well, OK, there was Rothman ) absolutely ...

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9:00 AM
William Leara
0
CPU, Intel, memory
9:00 AM

The Keyboard Controller Interface, 0x60/0x64

The Keyboard Controller Interface, 0x60/0x64
The Keyboard Controller Interface, 0x60/0x64

The original IBM PC (1981), and its immediate successor, the IBM PC/XT (1983), had keyboards limited to unidirectional communication:  data ...

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8:39 AM
William Leara
0
EC
8:39 AM
 
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Welcome to the Basic Input/Output website! Here I share things pertaining to the arcane art of PC BIOS development. For spice, I add material about software development in general and some interesting computer history vignettes. Please, try to contain your excitement!
—William Leara
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  • Introduction to UEFI Conformance Profiles
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latest UEFI specs

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    Why load the value “01301h” into AX before invoking interrupt 10h?

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