Atari CX - Page 176

Consumer Product Service \ I--
Manager of Tehnical Support vL3
TECH TIP number 7
SUBJECT:
Defective Rockwell 6502 MPU on CX5200 PC Board.
DESCRIPTION:
Rockwell MPUs with date code of 8250 and later (stamped with the letters
RC) have a timing defect.
A factory modification adds an R-C network on the component side of the
CXSZOO
PC Board at IC Ul4A (pin 1) and U6A (pin 4) (see Figures 1 and 2).
Note: You do not need to remove this network to use any other
manufacturer's MPU or a Rockwell MPU with a different date code.
1 OOpF
5
Figure 1. CX52OO Schematic (R-C Network)
omponent
Side
~~5200 PC Board
Figure 2. Factory Modification