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adding processor info
! colspan=4 width="250"|Cartridge Slot Pinout
|-
! Pin # !! Function !! I/O
|-
| 1 || || Read/Write (Write=LOW)
|-
| 2 || || HALT
|-
| 3 || || D3
|-
| 4 || || D4
|-
| 5 || || D5
|-
| 6 || || D6
|-
| 7 || || D7
|-
| 8 || || A12
|-
| 9 || || A10
|-
| 10 || || A11
|-
| 11 || || A9
|-
| 12 || || A8
|-
| 13 || || +5 VDC
|-
| 14 || || Ground
|-
| 15 || || A13
|-
| 16 || || A14
|-
| 17 || || A15
|-
| 18 || || External audio from cart
|-
| 19 || || A7
|-
| 20 || || A6
|-
| 21 || || A5
|-
| 22 || || A4
|-
| 23 || || A3
|-
| 24 || || A2
|-
| 25 || || A1
|-
| 26 || || A0
|-
| 27 || || D0
|-
| 28 || || D1
|-
| 29 || || D2
|-
| 30 || || Ground
|-
| 31 || || IRQ
|-
| 32 || || Phase 2 clock
|}
Sources:
* [http://atarihq.com/danb/7800cart/a7800cart.shtml http://atarihq.com/danb/7800cart/a7800cart.shtml]
* [http://www.atarimax.com/jindroush.atari.org/7800cart.html http://www.atarimax.com/jindroush.atari.org/7800cart.html]
==Processor==
The Atari 7800's processor is a variation of the 6502 named ''Sally''.
==Motherboard==
