Specifications

CHAPTER 2
Hardware Design
28 Audio and Video I/O Support
“Passing Messages” beginning on page 72 for a description of the software API used for
passing messages.
Autoconfiguration 2
The Mustard ASIC automatically configures the PC system each time the PC is reset. The
following configurations are sensed and set when the system is reset:
■ presence of DIMM in DIMM slot
■ setup switches for audio path
■ setup path for interrupts from the ISA bus
Audio and Video I/O Support 2
The way in which the cards support audio and video I/O depends on the Macintosh
computer in which the cards are installed. This section gives an overview of the different
I/O configurations supported. You should refer to the developer note and user’s guide
for your specific computer for more detailed information.
GIMO Support for Video Output 2
The 12” and 7” card each has an onboard GIMO (Graphics Internal Monitor Out)
connector socket. Figure 3-1 on page 34 and Figure 3-2 on page 35 show the position of
the GIMO connector on the 12” card and the 7” card, respectively. “GIMO Connector” on
page 46 provides specifications for the connector.
Certain CPUs, such as the Power Macintosh 7200, have equivalent GIMO connector
sockets. If you are using the cards in this type of computer, you can connect the monitor
using a ribbon cable and an adapter card known as the Berlin adapter card. Figure 2-8
shows a simplified view of the ribbon cable with GIMO connectors, and the Berlin
adapter card with its GIMO connector socket and edge connector.