![]() ![]() The decoding logic, inside the PALCE chip, uses the ROMEN signal from the VIA (pin PA0) as a selectrion between high RAM or EPROM. The Apple 1 was essentially a 6502 computer with 4k of RAM and 256 bytes of ROM.The inclusion of a 6821 PIA and a Signetics video encoder meant that the Apple 1 shipped with its own 2400 baud dumb terminal built in. ![]() Just supply your own keyboard, composite monitor, and you were in business. It uses a real 6502 processor as CPU, and a real Static RAM chip as memory. A Parallax Propeller generates the clock and other signals needed by the 6502, and it also controls the memory chip. #BREADBOARD PROTEUS LIBRARY SERIAL#įurthermore, the Propeller can provide video output (VGA, NTSC or PAL), keyboard input (PS/2 connector) and a serial connection. The System 1 released in 1979 was Acorn’s first computer kit. ![]() #BREADBOARD PROTEUS LIBRARY PROFESSIONAL#. ![]()
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