Motherboard Close-ups

The 6800 area of the board.

Joes tell us, "If I remember right, you pulled the 6502 chip and put in the 6800 cpu and all the parts and you had an Apple I based on the 6800 cpu instead of the 6502 cpu. I also believe that there was a law suit by Motorola who had the 6800 chip because MOS Tech who came out with the 6502 chip were all engineers who left Motorola and helped on the 6800 cpu and the 6502 cpu could use all the instructions that the 6800 had and was faster."

According to the manual: "Remove the 6502 cpu and put in a 6800 cpu into the 6502 socket. Install all componets shown in the 6800 breadboard area. Break both solder bridges on the board marked 6502, there are two of them. The Apple 1 computer is fully compatible with the 6500/6800 cpu timing signals."

This one shows rows of chips, A,B,C and D.

Here is a shot between rows B and C.

Here is the shot between rows C and D.

This top down shot shows the video adjust pot and the video output plug.

This is the MOS 6502 processor.

Here is a shot showing the switches under the front panel for the printer and tape cassette.

This is a top down shot of the power supply, diodes, regulators, filters caps, etc.