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Audio RAM: Difference between revisions
From SnesLab
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There are two '''ARAM''' chips on the [[SNES Motherboard]], both connected to [[S-DSP]]. All accesses from the [[SPC700]] go through the S-DSP. ARAM is a total of 65,536 bytes (or 256 pages, or one [[bank]], or 512 [[kilobits]]) in size. ARAM is timeshared between the S-SMP and S-DSP. | There are two '''ARAM''' chips on the [[SNES Motherboard]], both connected to [[S-DSP]]. All accesses from the [[SPC700]] go through the S-DSP. ARAM is a total of 65,536 bytes (or 256 pages, or one [[bank]], or 512 [[kilobits]]) in size. ARAM is timeshared between the S-SMP and S-DSP. | ||
According to [[fullsnes]], ARAMs consisting of two Motorola MCM51L832F12 32Kx8 SRAM chips tend to contain a repeating 64-byte pattern of 32 zeros and then 32 FFh's at power up. | |||
=== See Also === | === See Also === | ||
Latest revision as of 00:53, 14 August 2024
upper ARAM chip, straddling regions C4 and D4 of the jwdonal schematic
There are two ARAM chips on the SNES Motherboard, both connected to S-DSP. All accesses from the SPC700 go through the S-DSP. ARAM is a total of 65,536 bytes (or 256 pages, or one bank, or 512 kilobits) in size. ARAM is timeshared between the S-SMP and S-DSP.
According to fullsnes, ARAMs consisting of two Motorola MCM51L832F12 32Kx8 SRAM chips tend to contain a repeating 64-byte pattern of 32 zeros and then 32 FFh's at power up.
See Also
References
- subparagraph 22.5.3 on Page 2-22-3 of Book I of the official Super Nintendo development manual
- subparagraph 1.3.3 on page 3-1-2 of Book I, lbid.