references.md

References

Below there is a list of posts that helped me to gain actual knowledge about C64/MOS6510 architecture and answered many of my questions. Some of the links below address specific questions while other cover much broader topics.

CPU

• The 6502 Architecture (by prof William T. Verts)

Instruction set

• 6502 / 6510 Instruction Set
• 6502 Instruction Set

Memory access modes

• Writing your own NES emulator Part 3 - the 6502 CPU

Status register

• The 6502 Status Register: a Guide to Black Magic at 6502.org
• The 6502 overflow flag explained mathematically
• The Overflow (V) Flag Explained by Bruce Clark

BCD (Binary code decimal)

• Decimal Mode by Bruce Clark (at 6502.org)

Signed/unsigned numbers

• More about binary numbers
• Beyond 8-bit Unsigned Comparisons by Bruce Clark

Memory

Memory map

• Commodore 64 memory map
• C64 Memory Map

Bank switching

• Bank switching on C64 wiki
• C64 PLA Dissected

Reset / Boot sequence

• Reset (process) on C64 Wiki
• Internals of BRK/IRQ/NMI/RESET on a MOS 6502 by Michael Steil

Page boundaries

• Page Boundaries

VIC II and graphics

• Double IRQ Explained

Keyboard, Keymaps, PETSCII, etc

• How the C64 Keyboard Works
• Key Map to Screen editor

Online emulators (for testing instructions behaviour)

• Easy 6502
• Visual 6502