Sound Blaster Live CT4760 on pure DOS error "SB IRQ conflicting with PCI IRQ" \ VOGONS

Sound Blaster Live CT4760 on pure DOS error "SB IRQ conflicting with PCI IRQ"

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First post, by matti157

Posted on Yesterday, 21:01

matti157 Offline

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Posts: 165
Joined: 2020-12-28, 10:55

It's a strange setup, but I use an IBM T42 with it's original docking station that provides a PCI Slot.

I installed the Live CT4760 in that slot

I use the drivers by Philscomputerlab: https://www.philscomputerlab.com/sound-blaster-live.html

When I run the card initialization (sbecfg.com) I get the error: "SB IRQ conflicting with PCI IRQ"

HWINFO detects the card in the PCI 9, and in the BIOS I've already assigned the IRQ 7

Any ideas? It's an impossible setup?

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CTSYN.INI:

1[ctsyn.drv]
2OPLPORT=388
3MPUPORT=330
4SBPORT=220
5SBIRQ=7
6SBDMALO=1
7SBDMAHI=5
8SBENABLE=TRUE
9JOYPORT=200
10JOYENABLE=TRUE
11WAVESET=C:\LIVEDOS\EAPCI8M.ECW
12PCIPORT=9000
13PCIIRQ=9
14
15
16[SBEINIT]
17CONFIG=SBESET.CFG
18
19[SBESET.CFG]
20SBPORT=220
21MPUPORT=330
22SBIRQ=7
23SBDMALO=1
24SBDMAHI=5
25OPLPORT=388
26SBENABLE=TRUE
27JOYPORT=200
28JOYENABLE=TRUE
29WAVESET=C:\LIVEDOS\EAPCI8M.ECW
30PCIPORT=9000
31PCIIRQ=9
32
33[SBEMIXER]
34MasterVolL=250
35MasterVolR=250
36WaveVolL=250
37WaveVolR=250
38CDVolL=0
39CDVolR=0
40SynthVolL=250
41SynthVolR=250
42MT32=FALSE
43DigitalSpeakerEnable=FALSE
44

Reply 1 of 2, by leonardo

Posted on Yesterday, 23:14

leonardo Offline

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Rank: Oldbie
Posts: 610
Joined: 2013-08-17, 14:42

Just a hunch, but I would not reserve IRQ 7 for the PCI device in the BIOS/firmware. A SoundBlaster Live! will consume two interrupts: one for the actual device and one for the emulated SoundBlaster.

It looks as if you reserved the IRQ you intended for the emulated SoundBlaster to use for a PCI device, which makes it unavailable to use for emulation.

[Install Win95 like you were born in 1985!] on systems like this or this.

Reply 2 of 2, by NeoG_

Posted on Today, 00:09

NeoG_ Offline

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Posts: 448
Joined: 2024-12-27, 09:49
Location: Australia

An SB card with emulation running in DOS requires two IRQs, one for the physical card and one for the emulation. Change the PCI IRQ back to auto select and set IRQ7 in PnP configuration to Legacy/ISA. That will result in IRQ7 being clear for the emulation and the PCI card having a different IRQ.

98/DOS Rig: BabyAT AladdinV, K6-2+/550, V3 2000, 128MB PC100, 20GB HDD, 128GB SD2IDE, SB Live!, SB16-SCSI, PicoGUS, WP32 McCake, iNFRA CD, ZIP100
XP Rig: Lian Li PC-10 ATX, Gigabyte X38-DQ6, Core2Duo E6850, ATi HD5870, 2GB DDR2, 2TB HDD, X-Fi XtremeGamer

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