September 20th, 2010 ~ by admin

Visual Transistor-level Simulation of the 6502 CPU

Here is an interesting project.  Take very high resolution photography of a MOS 6502 die (such as that the powered the Apple 1) and use it to construct a simulater in Java that allows you to program the 6502 and watch it, on a transistor level, as it performs the program.

6502 Die - Visual 6502

An awesome way to see PHYSICALLY what happens for each and every instruction.  And what a great processor to do so on.  Ironically the LCD flat panel monitor you may be using? It may well be powered by a 6502 (Novatek used them in their flat panel controllers)

Check it out at Visual 6502

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Just For Fun, Research

September 10th, 2010 ~ by admin

$23,000 for a 1MHz Computer – Only if its an Apple 1

A nice Working Apple 1 computer with much documentation was just (minutes ago) sold on eBay for $22,766.66.  Early computers (and the chips that make them work) are greatly increasing in value.  Especially if it happens to have the famous Apple name and customizations done by Wozniak himself.

Apple 1 Motherboard

The CPU on this board is a MOS 6502 in a beautiful white ceramic package.  It moved 8 bits of data at 1MHz.

MOS MCS6502 1976

Many other computers from the 1970’s are now worth thousands of dollars as well, such as the IMSAI 8080 and the Kim 1

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Processor News