4
Hardware/Software
Section 1 - Introduction
1.5 What is Plug and Play ISA Standards?
The ISA bus architecture allows allocation of I/O address spaces, DMA
channels, and interrupt levels among multiple ISA cards. However, the
ISA interface has no defined hardware or software mechanism for allocat-
ing these resources. As a result, configuration of ISA cards is typically
done with jumpers that change the decode maps for I/O spaces and steer
the DMA and interrupt signals to different pins on the bus. Further, system
configuration files may need to be updated to reflect these changes. Users
typically resolve sharing conflicts by referring to documentation provided
by card manufacturer. For the average user , this configuration process can
be difficult and frustrating.
A Plug and Play-compliant system can identify the Plug and Play ISA
cards and the resources they use, then program these resources so they do
not conflict. The conflict-resolution scheme used on Plug and Play ISA
cards essentially puts all cards ‘to sleep’, then reads the card identification
and the information about what the card can do and the resources it re-
quires. This information can include what resources are programmable
and over what ranges they can be programmed. With this information, the
system can configure the card in a way that prevents conflicts with other
cards in the ISA bus.
1.6 Wave-Table Upgrade Board
For saving one I/O port and one IRQ channel, we disable MPU-401 MIDI
device as default value. If you want to output by wave-table (MPU-401
MIDI device):
In DOS (also Windows 3.1), please run CMINIT.EXE to enable MPU-
401 MIDI device. In Windows 3.1, please add MPU-401 device drivers
at first. Click on “Drivers” icon in “Control Panel” of “Main” group.
Click “Add” button and select “ROLAND MPU-401” to add device
drivers. After reboot, please click on “MIDI Mapper”icon in “Control
Panel” of “Main” group. Select item ‘MPU-401 MIDI’ in ‘Name’ and
click ‘Close’ button.
In Windows 95 system, please run En_Disable MPU-401 MIDI device
program(MDEVSET.EXE) to enable MPU-401 MIDI device. After reboot,
click “Start” button, and then click “Control Panel” at “Settings” Menu.
Double click on the “Multimedia” icon and click “MIDI”. In “Single In-
strument”, select “C-Media inc. External MIDI (MPU-401)” item.
