6.System3.0:> bustest chip fast rom
BusSpeedTest 0.19 (mlelstv)   Buffer:     262144 Bytes, Alignment: 32768
========================================================================
memtype   addr       op         cycle     calib         bandwidth
fast      $00328000  readw     437.3 ns   normal       4.6 * 10^6 byte/s
fast      $00328000  readl     437.8 ns   normal       9.1 * 10^6 byte/s
fast      $00328000  readm     395.8 ns   normal      10.1 * 10^6 byte/s
fast      $00328000  writew    289.8 ns   normal       6.9 * 10^6 byte/s
fast      $00328000  writel    289.7 ns   normal      13.8 * 10^6 byte/s
fast      $00328000  writem    268.1 ns   normal      14.9 * 10^6 byte/s
chip      $00018000  readw     886.9 ns   normal       2.3 * 10^6 byte/s
chip      $00018000  readl     886.6 ns   normal       4.5 * 10^6 byte/s
chip      $00018000  readm     705.2 ns   normal       5.7 * 10^6 byte/s
chip      $00018000  writew    576.0 ns   normal       3.5 * 10^6 byte/s
chip      $00018000  writel    577.3 ns   normal       6.9 * 10^6 byte/s
chip      $00018000  writem    575.1 ns   normal       7.0 * 10^6 byte/s
rom       $00F80000  readw     429.5 ns   normal       4.7 * 10^6 byte/s
rom       $00F80000  readl     429.8 ns   normal       9.3 * 10^6 byte/s
rom       $00F80000  readm     396.1 ns   normal      10.1 * 10^6 byte/s