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- RAS. AX, CAS and Q3
- the 6502 machine cycle slightly lags the phase 0 clockpulse
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Understanding the Apple II (by Jim Sather) is a incomparable source of information about how the Apple II works. It documents all motherboard circuits, describes the disk controller operation, explains RAM and ROM and includes 23 hardware and software Application Notes, including shift key mod, disk write protect mod, and EPROM mods
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