Delay occurs accessing sound card connected to CD-ROM drive due to selected IRQ.
Cause:
This problem is known to occur with this hardware configuration when the sound card is configured to use IRQ 11 or IRQ 15. The problem may be caused by a resource conflict, although the problem is not IRQ-specific and may occur even when no other device is configured to use the same IRQ as the sound card.
Solution:
Change the IRQ setting of a sound card.
1) If the sound card is a plug-and-play device:
a) Open the 'Device Manager', and select the 'View devices by type' radio button.
Device Manager
b) Double-click the 'Sound, video and game controllers' icon in the 'View devices by type' list box.
c) Double-click on the sound card driver. (The sound card driver 'Properties' dialog box appears.)
Sound card Properties
d) Click the 'Resources' tab, and, if the 'Use automatic settings' check box is selected, clear it.
e) Select the 'Interrupt Request (IRQ)' resource in the 'Resource settings' list box, and click 'Change Setting...'. (The 'Edit Interrupt Request' dialog box appears).
'Edit Interrupt Request' dialog box
NOTE: If the 'No modifications allowed' message box appears, this resource cannot be changed and you will have to change the IRQ setting on the other device that is configured to use this DMA value.
f) Select a new IRQ from the list of available IRQs in the 'Value' drop-down list box and click 'OK'.
NOTE: If you have a real mode driver loaded in the AUTOEXEC.BAT for the sound card, you will need to make changes to the real mode driver to reflect the IRQ setting change in step 1)f). Refer to the sound card user manual for instructions on how to configure a real mode driver for the sound card.
g) Click 'OK' to select a new interrupt.
h) Click 'OK' again.
i) Click 'Yes'. (The system changes the interrupt.)
2) If the sound card is a legacy device:
WARNING: Electrical shock hazard! Make sure the power is turned off and the external power cables have been disconnected before removing the computer cover.
CAUTION 1: This task should be performed by a qualified computer technician.
CAUTION 2: Please observe steps to reduce the potential damage to computer components from electrostatic discharge.
NOTE 1: If you are installing a sound card with a CD-ROM drive controller, you will have to configure the sound card first and then install the CD-ROM drive. You will not be able to install drivers from the Windows 95 CD-ROM from your CD-ROM drive until the CD-ROM drive has been reconfigured. If this causes any problems, contact next-level support or a qualified computer technician.
NOTE 2: If you already know what resources to use for the sound, skip steps 2)a) through 2)l).
a) Click the 'Start' button to display the 'Start' menu.
b) Select 'Settings' and select 'Control Panel'. (The 'Control Panel' window appears.)
'Control Panel' window
c) Double-click the 'System' icon. (The 'System Properties' dialog box appears.)
d) Click the 'Device Manager' tab. (The system devices are displayed.)
Device Manager
e) Select the 'Computer' icon, and click 'Properties'.
Select Computer and click Properties
f) Click 'Properties'. (The 'Computer Properties' dialog box appears.)
Computer Properties
g) Select the 'Interrupt request (IRQ)' radio button.
h) Record which interrupts are not assigned.
i) Refer to the sound card manual to determine what IRQs are addressable by hardware jumpers on the sound card.
Example of hardware jumpers
j) Click the 'Reserve Resources' tab.
k) Select the 'Interrupt request (IRQ)' radio button, and click 'Add...'. (The 'Edit Resource Settings' dialog box appears.)
l) Type a IRQ value to be used by the sound card in the 'Value' list box, and click 'OK'
NOTE: If more than one IRQ is needed for the sound card, repeat step 2)l).
m) Click 'OK' again.
n) Shut down Windows 95, and turn off the computer.
o) Disconnect the external power cord from computer.
p) Remove the computer cover.
q) Locate the existing sound card.
NOTE: The external edge of a sound card may have a 15 pin game port, at least three stereo jack connectors, and some older cards will have a thumb wheel volume control.
Example of sound card profile
r) Unplug all of the cables connected to the external jacks and disconnect any devices connected to the joystick port.
s) Disconnect the sound cable connecting the sound card to an internal CD-ROM if present.
t) Remove the screw securing the sound card to the computer and lift the sound card from the expansion slot with both hands.
CAUTION: Be careful not snag any cables or scratch components when lifting the sound card from the computer.
u) Set the jumpers on the sound card to match the device resources reserved in steps 2)a) through 2)l).
NOTE: Refer to the sound card manual for proper jumper settings.
v) Determine the expansion slot type for the sound card.
w) Align the sound card parallel with an empty slot matching the card, and insert the card into the slot.
CAUTION: Keep the card vertical while inserting it into an expansion, and be careful not bend the sound card board. Bending the sound card board can damage the circuitry.
x) Reconnect all of the cables connected to the external jacks, and disconnect any devices connected to the joystick port.
y) Disconnect the sound cable connecting the sound card to an internal CD-ROM if present.
z) Replace the computer cover, reconnect the external computer power cord, and turn on the computer. (Allow Windows 95 to start normally.)
