Editing Atari 2600 (section)

== Integrated circuits ==

<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table" style="width:80%;"
|+'''Atari part numbers and board locations'''
! Location !! Atari P/N !! Device !! Function !! Package
|-
| A200 || C010745 || MOS 6507 || Microprocessor || 28-pin DIP, socketed
|-
| A201 || C010444 || TIA || Television Interface Adaptor: video, sound and the paddle A/D || 40-pin DIP, socketed
|-
| A202 || C010750 || MOS 6532 || RAM-I/O-timer (RIOT/PIA): 128 bytes RAM, two 8-bit ports, timer || 40-pin DIP, socketed
|-
| A203 (CX2600, Revs 1–13) || C010816 || 4050B || Hex buffer for video and the joystick trigger lines
|-
| A203 (CX2600A, Rev 14+) || C014348 || 78M05 || +5 V regulator, TO-220
|-
| A205 (CX2600A, Rev 14+) || — || 555 || Timer
|-
| A101 (CX2600 switchboard) || C014348 || 78M05 || +5 V regulator, TO-220
|}

The CPU, TIA and RIOT are socketed on both boards, so a donor chip can be swapped in without desoldering.<ref name="fsm2600" /> Atari's service checklist notes that boards fitted with Molex sockets with insertion aids should have the aids removed and the chip reseated — a known cause of intermittent contact.<ref name="fsm2600" />

The '''hex buffer is the component most often killed by static discharge through the controller ports''', which is why Atari issued a retrofit for it in February 1982.