Processor: 68HC000@28Mhz with static RAM cache.
Connects to the external expansion slot on A500 machines, and includes a pass-through for other expansions.
Jumpers
The Boot Jumper:
Can serve as an on/off switch. When enabled you won't be able to boot. from the Supra. A cable from the jumper goes outside the machine with a switch on it. This may only be on the A2000 version.
The "Machine Jumper":
If using an A500, the Machine jumper must be removed.
If using an A2000, the Machine jumper must be installed.
The 'Option Jumper":
For use with e.g. a bridgeboard. When having more than 4 Mbyte of FAST
Ram you can remove the Option jumper. Removing the Option jumper will
disable caching of the upper four megabytes of the Amiga auto-configuring
RAM expansion space. In Amigas with at least four megabytes of auto-
configuring RAM, this will allow the dual ported RAM of the bridgeboard
to operate without affecting the cache on the SupraTurbo28.
Some text on operating the SupraTurbo28:
SupraTurbo can be turned ON (fast speed) or OFF (slow speed) at any
time just by changing the setting of the ON/OFF switch on the SupraTurbo.
The software provided can also be used to turn the SupraTurbo ON (Fast
speed) or OFF (slow speed). The position of the ON/OFF switch at power on
or reset determines the initial operating speed of the computer. Once the
computer is turned on, the switch can be used to change the speed of the
computer, or the software can be used.
Because there are two ways to control the speed, the setting of the hard- ware switch (ON/OFF) does not always reflect the true state of SupraTurbo28; however, the speed buttons window in the software provided does always reflect the true speed that SupraTurbo28 is using, because it's continually updated.
The SupraTurboInstall diskette contains a program that can be used to turn SupraTurbo28 on (FAST) or off (SLOW). The program provides two buttons (FAST and SLOW) for SupraTurbo speed selection.
The CLI commands for SupraTurbo28 are as follows:
1. supraturbo fast
2. supraturbo slow
Thanks to Dell Smith & Andrew Bowers