Specifications

CHAPTER 1
Introduction
8 Overview of Functional Capabilities
Joystick and MIDI Devices 1
You can connect a PC-compatible joystick to the DB15 (15-pin) connector on the edge of
the cards. This connector is accessible on the rear panel of the Macintosh host computer.
However, you need a standard joystick/media adapter to make the connection. The
joystick can only be used with programs running on the PC side of the system. You can
also connect MIDI devices through the same connector.
ISA Access 1
Each card has an XD connector that provides limited access to the unbuffered ISA bus.
This enables you to create a parallel port for third-party hardware keys. You do this by
connecting an expansion card to the XD connector and then connecting a hardware key
to the expansion card.
IMPORTANT
External cards connected to the ISA bus must have only one load if they
are unbuffered. If they have more than one load, you must provide
buffering for them. ▲
System BIOS 1
The cards use a 128K system BIOS. The BIOS is stored in Macintosh memory and
downloaded to the DRAM on the cards when the computer is booting. The BIOS is
different for each card, because they have different microprocessors and chip sets.