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This page is used to document details of the hardware for the [[Atari 7800]].
| 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 ? || A43086PC |-| 23 || A3|-| 24 |? | A2|<center>-| 25 || A1|-| 26 || A0|-| 27 || D0|-| 28 || D1|-| 29 || D2|-| 30 || Ground|-| 31 || IRQ|-| 32 || Phase 2 clock</center>
Sources:* [http://atarihq.com/danb/7800cart/a7800cart.shtml http[Category://atarihq.com/danb/7800cart/a7800cart.shtmlHardware]* [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==A peculiarity of 7800 motherboards is that the top and bottom of the boards may have diferent revision labels. ===CAO2523x===The top of this board is labeled 'CA025234' and the bottom is labeled 'CA025233-002 REV A'.<gallery>Atari-7800-CAO25234-board-top.jpg|CAO25234 (top)Atari-7800-CAO25233-002-revA-board-bottom.jpg|CAO25233-002 REV A (bottom)</gallery>
→Atari 2600
==Cartridge Slot[[Atari 2600]] =={Board label: ''C015519 Rev. 12'' <gallery>VCS14.jpegVCS12.jpegVCS11.jpegVCS10.jpegVCS8.jpegVCS7.jpegVCS6.jpegVCS4.jpegVCS1.jpeg</gallery> == [[Atari 2600| classAtari 2600 Jr.]] ="mw-collapsible mw-collapsed wikitable" style="width[[File:2600jr_board_top.jpg|thumb|Top of motherboard]][[File: 500px;"2600jr_board_bottom.jpg|thumb|Bottom of board]] ! colspan{| border="4 width="250"|Cartridge Slot Pinout|-! Pin # !! Function+Board label: ''C021503 Rev D''
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| 1 A# || Read/Write (Write=LOW)Brand || Name || Description || Documentation
|-
| 2 A1 || HALT? || UM6532 || PIA (RAM, timers, I/O) || <center>-</center>
|-
| 3 A2 || D3? || UM6507 || 6507 Processor. Variant of the 6502. || <center>-</center>
|-
| 4 A3 || D4? || C010444 || TIA (Video and sound) || <center>-</center>
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| 5 A4 || D5? || CD405OBE || ? || <center>-</center>
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|}
