To activate the full performance of your MACCELERATE!750 processor accelerator card, you have to activate the on-board backside cache of the MACCELERATE!750. The backside cache is activated with the "BCache Control" utility which is supplied with the card.
The "BCache Control" utility must be copied to you Control panel drawer to enable automatical activation of the backside cache on every restart of your computer.
The following settings must be made in "BCache Control":
SIZE:
The SIZE setting for the backside cache must be adjusted to the cache size of the MACCELERATE!750 version you are using. Please refer to your manual or the box to identify the size of the backside cache on your particular MACCELERATE!750 (either 512K or 1024K).
CLOCK:
This setting determines the speed with which the backside cache is accessed by the processor. The backside cache on all MACCELERATE!750 cards runs nominally at 50% of the processor speed, therefore the correct setting for CLOCK is 2:1; however, many of the boards may work properly with the 3:2 setting due to the tolerances of the cache memories used. In this setting, the backside cache runs with 66.6% of the processor speed, which may helps to gain a few percent of additional performance. The MACCELERATE!750 cards can not be used with a 1:1 setting.
ATTENTION:
If your computer freezes immediately after activating the "ENABLE NOW" button in the "BCache Control" utility, your CLOCK setting is probably wrong; with a 1:1 setting this will happen in any case.
ENABLE CACHE ON RESTART:
When this switch is activated, the "BCache Control" utility will activate the backside cache automatically on every restart of your computer.
COMPATIBILITY:
This setting is currently not used, and can be ignored. We recommend, however, to set COMPATIBILITY to the processor type which has been installed in your system before the MACCELERATE!750 was installed.
ENABLE NOW / DISABLE NOW:
This butto is used to activate/deactivate the backside cache during operation. Please note that any changes of the settings described above will only become valid when the backside cache is disabled (the butto shows ENABLE NOW) while the settings are changed. If you change any settings you can immediately test them to verify proper operations of the settings you have choosen.
A NOTE ON AUTOMATICAL ACTIVATION of the backside cache on restart of your computer: During retart of your computer, the G3 icon of the "BCache Control" utility will appear at the lower edge of the screen, and will show a green checkmark if the activation of the backside cache was succesful. If your computer stops booting after the G3 icon appeared, without showing the green checkmark, you have probably entered wrong settings such as a CLOCK setting of 1:1. In this case, start your computer without any system extension (by holding down the shift-key during startup), start the "BCache Control" utility directly from the .... drawer in your system folder, and change the settings to a valid setting.