P ROM: Difference between revisions
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[[File:p_rom.jpg|thumb|right|1MiB P1 ROM]] | [[File:p_rom.jpg|thumb|right|1MiB P1 ROM]] | ||
16bit ROM(s) containing byteswapped [[68k]] binaries in [[cartridges]]. | 16bit ROM(s) containing byteswapped [[68k]] binaries in [[cartridges]]. | ||
Minimum speed: 150ns. Can use slower ROMs by using the cartridge's wait state configuration. | |||
Sometimes, two 8 bit ROMs are used as a second P ROM (called "SP1/2" or "EP1/2"). | Sometimes, two 8 bit ROMs are used as a second P ROM (called "SP1/2" or "EP1/2"). | ||
Revision as of 04:33, 28 October 2015
16bit ROM(s) containing byteswapped 68k binaries in cartridges.
Minimum speed: 150ns. Can use slower ROMs by using the cartridge's wait state configuration.
Sometimes, two 8 bit ROMs are used as a second P ROM (called "SP1/2" or "EP1/2").
When unbanked, the maximum size is 1MiB. Some games use bankswitching to use 2MiB or bigger P ROMs.
Some cartridges use an NGPC flash board soldered in place of the mask ROMs.