runnerscrab / beater6502 Goto Github PK

Summary
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Test code / schematics for a breadboarded 6502 computer very similar
to the Ben Eater 6502 computer, but with:

	* a differently apportioned address space/decoding circuitry
	* a UART + FT232R USB interface / MAX233 & DTE to DTE RS-232C connection
	* a smaller ROM (8 KiB)
	* a different SRAM brand (pin compatible, slightly different timing)
	* 4-bit communication with the LCD module (only 7 pins on VIA port B are required)

Address Space
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0000-7FFF RAM
8000-9FFF VIA (a beefy peripheral interface chip)
A000-BFFF ACIA (UART)
C000-DFFF unassigned
E000-FFFF ROM