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Address Bus B: Difference between revisions

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=== Reference ===
=== Reference ===
# https://forums.nesdev.org/viewtopic.php?p=116505#p116505
# https://forums.nesdev.org/viewtopic.php?p=116505#p116505
# Figure 2-22-1, "Super NES Functional Block Diagram" on [https://archive.org/details/SNESDevManual/book1/page/n97 page 2-22-2 of Book I]


[[Category:SNES Hardware]]
[[Category:SNES Hardware]]
[[Category:Traces]]
[[Category:Traces]]
[[Category:Buses]]
[[Category:Buses]]

Revision as of 22:00, 27 December 2023

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:

It is drawn in purple in the colorized jwdonal schematic. Some people like to think of Address Bus B as being 16-bits wide, with the high byte being fixed to $21.[1]

See Also

Reference

  1. https://forums.nesdev.org/viewtopic.php?p=116505#p116505
  2. Figure 2-22-1, "Super NES Functional Block Diagram" on page 2-22-2 of Book I