Apollo 1260 bustest results

[fiat1100d]

This is the output of BusSpeed on my A4000T with Apollo 4060 @ 100 MHz, I have a Picasso IV but set the screen to 640x512 32 colors for comparison with the other tests.

BusSpeedTest 0.19 (mlelstv)   Buffer:     262144 Bytes, Alignment: 32768
========================================================================
memtype   addr       op         cycle     calib         bandwidth
fast      $08348000  readw      47.0 ns   normal      42.5 * 10^6 byte/s
fast      $08348000  readl      81.0 ns   normal      49.4 * 10^6 byte/s
fast      $08348000  readm      82.7 ns   normal      48.4 * 10^6 byte/s
fast      $08348000  writew     61.5 ns   normal      32.5 * 10^6 byte/s
fast      $08348000  writel    122.5 ns   normal      32.7 * 10^6 byte/s
fast      $08348000  writem    125.0 ns   normal      32.0 * 10^6 byte/s
chip      $00050000  readw     633.8 ns   normal       3.2 * 10^6 byte/s
chip      $00050000  readl     632.4 ns   normal       6.3 * 10^6 byte/s
chip      $00050000  readm     632.5 ns   normal       6.3 * 10^6 byte/s
chip      $00050000  writew    596.1 ns   normal       3.4 * 10^6 byte/s
chip      $00050000  writel    596.1 ns   normal       6.7 * 10^6 byte/s
chip      $00050000  writem    596.3 ns   normal       6.7 * 10^6 byte/s

[fiat1100d]

-D- wrote:

:-o

Nice. Is it relatively stable at that speed?

Well, the system can work for hours before freezing, or it can work for few seconds... I wouldn't define it "stable" but I think it depends on the Apollo hardware being not so good... An idea I have is to build another voltage regulator using a single IC which delivers more current and has higher efficiency (the Apollo one is pretty much copied from a schematic on the 68060 User's Manual and it is rated for 3.3V @ 2 A, while @ 100 MHz the 68060 may need more current).