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BIOS is an initialism of Basic Input/Output System. It was coined in 1975 by Gary Kildall of Digital Research Inc. as a part of the CP/M concept. It consists of the instructions required for bootstrapping IBM-compatible machines also called PC. Today it is a fix part of a motherboard.

Consequently, there is no BIOS in the C64. The closest approximation would be the KERNAL[1] ROM which consists of the low-level, machine/hardware specific OS routines.


WP-W11.png Wikipedia: BIOS


  1., accessed 14 December 2013