Description
6502 is the heart of the computer. It's based on MOS Technologies 6502.
While the 400/800 models contain a generic 6502 CPU, all of the XL/XE models
contain Atari's customized 6502C chip.
6502c has an extra line called HALT. It is controlled by ANTIC which
it uses whenever it needs the data/address bus. The HALT line
must be pulled high for the chip to work. Early
400/800 NTSC computers used a standard 6502 and 4 additional chips to stop the
processor when ANTIC needed the busses.
Catalogue numbers
CO14377 (6502B - used in 400/800 models - standard 6502)
CO14806 (6502C - used in XL/XE models - customized)
Pinout
Back (c) 1998-2004 Jindroush Last modified: Sun Mar 25 23:49:14 2001