Address Bus B

Address Bus B, also known as the SNES bus, is 8-bits wide on the SNES motherboard. Its individual address lines are labeled PA0-PA7, which stands for "peripheral address," as in S-CPU peripherals (not SNES peripherals). It is connected to:

• pins 51-58 of the S-CPU
• pins 5-12 of S-PPU1
• pins 43-50 and 53-54 of WRAM
• pins 28-30 and 59-61, 3 and 34 of the Cartridge Slot
• pins 1-8 of the Expansion Port
• the S-SMP
• S-PPU2

It is drawn in purple in the colorized jwdonal schematic.