Welcome to cerebrum’s documentation!

Contents:

• C64
  • Hardware Reference and Repair Guide
    • Pictoral Fault Guide
    • Integrated Circuits
      • MOS/CSG
        • 6510 CPU
        • 6526 CIA
        • 6567 VIC-II (NTSC)
        • 6569 VIC-II (PAL)
        • 6581 SID
        • 6582 SID
        • 8500 CPU
        • 8562 VIC-II (NTSC)
        • 8565 VIC-II (PAL)
        • 8580 SID
        • 8701
        • 251715 PLA/MMU
        • 251913 BASIC/KERNAL
        • 252535 PLA/MMU
        • 901225 CHARACTER
        • 901226 BASIC
        • 901227 KERNAL
        • 906114 PLA
      • Miscellaneous
        • 2114 COLOR RAM
        • 41464 RAM
        • 4164 RAM
    • Mainboards
      • 326298
      • KU14194HB
      • 250407
      • 250425
      • 250441
      • 250466
      • 250469
    • Quick Reference
      • 250469 Address Lines
      • 250469 Data Lines
      • Dead Test
  • Programming Reference Guide
• Style Guide
• TODO

Hints

<signal_name>_l

active low, f.e. if IRQ_l is active, signal logic level is low

Examples of binary logic levels

Technology	L voltage	H voltage	Notes
CMOS	0 V to 1/3 Vdd	2/3 Vdd to Vdd	VDD = supply voltage
TTL[3]	0 V to 0.8 V	2 V to Vcc	Vcc = 5 V ±10%

brainstorming toctree

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