APPLIED ENGINEERING TransWarp - Manual (Page 4)

TransWarp
Getting Started
Before the TransWarp card is installed in the computer, some of the switches on
the TransWarp card may need to be changed to accommodate the timing needs
of the other cards installed in your system.
TransWarp will work with all standard peripheral cards, such as expanded memory
cards, printer and modem interfaces, clock cards, 80 column cards, mouse cards,
and disk drive controllers. Some of these cards, though, may not operate as
expected at the higher TransWarp speeds. By setting the switches on the
TransWarp card, you can tell the TransWarp’s circuitry which cards, in which slots,
require the 1 MHz clock rate. This will allow TransWarp to slow down to the
Apple’s clock speed momentarily when those cards are accessed by the
software. This has a very small effect on the overall TransWarp speed, since
these interfaces are accessed for very short periods of the computer’s time.
TransWarp must be specially configured to be compatible with memory expansion
cards which install in the Apple’s expansion slots (zero through seven) and use
the $D000 to $FFFF “language card bank switching technique” to expand the
Apple’s memory. For details on the operation of your memory card, refer to its
instruction manual. Newer expansion slot memory expansion cards do not use
this technique. The procedure for configuring the TransWarp card for expansion
slot memory card compatibility is explained in the next section.
Due to the number and variety of expansion and interface cards available, it is
impassible to list which cards require the 1 MHz clock rate. Without a great deal of
technical information, it is also impossible to determine which cards will or won’t
work at TransWarp speed. Generally, most floppy disk controllers, serial
printer and communications interfaces, and clock cards do require the
1 MHz timing signal. Parallel printer interfaces, hard disk controllers,
80 column cards, and mouse cards usually will operate correctly at full
TransWarp speed.
The simplest method of determining the timing signal requirement of a card is to
try it at TransWarp speed. If it doesn’t work properly, set the appropriate
TransWarp switch to slow down for that expansion card slot. The instructions for
setting these switches are in the next section.
Note: TransWarp was designed to be very power efficient, but like all
accelerator cards, it draws a fair amount of power and generates heat.
Applied Engineering recommends the use of a cooling fan, such as the
Kensington Microware System Saver®, especially when the TransWarp
is installed in a lie with the newer style case. These specially designed
fans are available from many computer dealers.
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