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SlowROM: Difference between revisions
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'''SlowROM''' is 2.68 Mhz. It is not as fast as [[FastROM]]. SlowROM is a property of the ROM chip itself and not the board it is soldered onto.<sup>[2]</sup> [[DMA]] always happens at SlowROM speed. When the [[5A22]] is operating at slowROM speed, there are 8 [[master clock]] cycles per CPU [[machine cycle]]. | '''SlowROM''' is 2.68 Mhz. It is not as fast as [[FastROM]]. SlowROM is a property of the ROM chip itself and not the board it is soldered onto.<sup>[2]</sup> [[DMA]] always happens at SlowROM speed. When the [[5A22]] is operating at slowROM speed, there are 8 [[master clock]] cycles per CPU [[machine cycle]]. | ||
[[File:master_clock_divider_speeds.png]] | |||
=== See Also === | === See Also === | ||
Revision as of 23:43, 17 August 2024
SlowROM is 2.68 Mhz. It is not as fast as FastROM. SlowROM is a property of the ROM chip itself and not the board it is soldered onto.[2] DMA always happens at SlowROM speed. When the 5A22 is operating at slowROM speed, there are 8 master clock cycles per CPU machine cycle.
See Also
References
- Near, https://forums.nesdev.org/viewtopic.php?t=9585
- Bregalad, lbid.