Address Bus A

Address Bus A is a 24-bit bus on the SNES. It is drawn in orange in the colorized jwdonal schematic, and its individual address lines are labeled CA0-CA23.

It is connected to:

• S-CPU pins 2-17 and 93-100
• WRAM pins 23-42
• Cartridge Slot pins 5-17 and 37-48

It is 24 bits wide because that is how big the SNES' address space is. It can address up to 16 megabytes.

See Also

• Address Bus B
• CPU Data Bus

Reference

1. Figure 2-22-1, "Super NES Functional Block Diagram" on page 2-22-2 of Book I