MOS 6502 Overview


General information

6502 schematics is divided on two major parts : "top" and "bottom", as found on 6502 blueprints:


Source: http://visual6502.org/wiki/index.php?title=650X_Schematic_Notes

Дональд Хенсон зажал схемы, поэтому качество сканов очень низкое и разобрать в деталях их невозможно.

Top part components

Bottom part components

Bottom part is controlled by top part through special control lines - drivers.

Family photo

Top part

Instruction Register (IR) T-counter PLA
Predecode (PD) Random Logic Interrupt handling
Misc&pads

Images (should be) clickable

Bottom part

Address Bus Data latch / data bus Registers Y, X, S
ALU Program Counter High (PCH) Program Counter Low (PCL)

Images (should be) clickable




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