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Work RAM: Difference between revisions
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'''WRAM''' (Work RAM) serves as the SNES' main memory. It has part number 21326. [3] | '''WRAM''' (Work RAM) serves as the SNES' main memory. It is 128K x 8 bits (131,072 bytes) in size. It has part number 21326. [3] | ||
Even though WRAM has both [[Address Bus A]] and [[Address Bus B]] connected to it, the chip can only pay attention to one at a time, so WRAM-to-WRAM [[DMA]] isn't possible. | Even though WRAM has both [[Address Bus A]] and [[Address Bus B]] connected to it, the chip can only pay attention to one at a time, so WRAM-to-WRAM [[DMA]] isn't possible. | ||
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* [2] https://problemkaputt.de/fullsnes.htm#snescontrollersotherinputs | * [2] https://problemkaputt.de/fullsnes.htm#snescontrollersotherinputs | ||
* page 1 of Book II, "Super NES Parts List" in the official Nintendo development manual | * page 1 of Book II, "Super NES Parts List" in the official Nintendo development manual | ||
* https://archive.org/details/SNESDevManual/book1/page/n97 | |||
Revision as of 06:33, 6 July 2023
WRAM (Work RAM) serves as the SNES' main memory. It is 128K x 8 bits (131,072 bytes) in size. It has part number 21326. [3]
Even though WRAM has both Address Bus A and Address Bus B connected to it, the chip can only pay attention to one at a time, so WRAM-to-WRAM DMA isn't possible.
WRAM is left intact by the Reset_Button. [2]
References
- [1] https://problemkaputt.de/fullsnes.htm#snesmemoryworkramaccess
- [2] https://problemkaputt.de/fullsnes.htm#snescontrollersotherinputs
- page 1 of Book II, "Super NES Parts List" in the official Nintendo development manual
- https://archive.org/details/SNESDevManual/book1/page/n97