Daniel Lee Kruse wrote:
 
> Everyone using a SCSI adapter,
> Is the SCSI apapter sharing IRQs, or is it assigned an IRQ not
> assigned to any other components?

PCI.EXE report on this eCS 1.1 system (edited to simplify):
http://www.pcchips.com.tw/PCCWeb/Products/ProductsDetail.aspx?MenuID=92&LanID=0&DetailID=298&DetailName=Specification

Craig Hart's PCI+AGP bus sniffer, Version 1.01vkA, freeware made in 1996-2005.

PCI BIOS Version 2.10 found! (Summary Report)
Number of PCI Busses : 2
PCI Characteristics  : Config Mechanism 1 

Searching for PCI Devices using the OEMHLP$ driver

 Vendor 8086h Intel Corporation
 Device 2580h 82915G/GV/GL/P/PL/GL Grantsdale Host Bridge/DRAM Controller

 Vendor 8086h Intel Corporation
 Device 244Eh 82801FB Hub Interface to PCI Bridge (ICH6 B1 step)

 Vendor 8086h Intel Corporation
 Device 2640h 82801FB/FR ICH6/ICH6R LPC Interface Bridge

 Vendor 8086h Intel Corporation
 Device 266Fh 82801FB ICH6 Ultra ATA Storage Controller
 System IRQ (disabled), INT# A

 Vendor 8086h Intel Corporation
 Device 2658h 82801FB ICH6 USB UHCI Controller 1
 System IRQ 3, INT# A

 Vendor 8086h Intel Corporation
 Device 265Ch 82801FB ICH6 USB 2.0 EHCI Controller
 System IRQ 3, INT# A

 Vendor 8086h Intel Corporation
 Device 2668h 82801FB ICH6 High Definition Audio Controller
 Subsystem Vendor 1019h Elitegroup Computer Sys
 System IRQ 5, INT# A

 Vendor 8086h Intel Corporation
 Device 265Bh 82801FB ICH6 USB UHCI Controller 4
 System IRQ 5, INT# D

 Vendor 8086h Intel Corporation
 Device 266Ah 82801FB ICH6 SMBus Controller
 System IRQ 5, INT# B

 Vendor 1000h LSI Logic (Was: Symbios Logic, NCR)
 Device 000Bh LSI53C896/7 PCI to Dual Channel Ultra2 SCSI Multifunction Controller
 Subsystem ID 10201000h LSI21002 PCI to Dual Channel Ultra2 SCSI host adapter
 System IRQ 5, INT# B

 Vendor 10ECh Realtek Semiconductor
 Device 8169h RTL8169 Gigabit Ethernet Adapter
 Subsystem Vendor 1019h Elitegroup Computer Sys
 System IRQ 5, INT# A

 Vendor 8086h Intel Corporation
 Device 265Ah 82801FB ICH6 USB UHCI Controller 3
 System IRQ 10, INT# C

 Vendor 100Ch TSENG LABS Inc
 Device 3208h ET6000/ET6100
 System IRQ 10, INT# A

 Vendor 8086h Intel Corporation
 Device 2659h 82801FB ICH6 USB UHCI Controller 2
 System IRQ 11, INT# B

 Vendor 8086h Intel Corporation
 Device 2651h 82801FB ICH6 SATA Controller 
 System IRQ 11, INT# B

 Vendor 1000h LSI Logic (Was: Symbios Logic, NCR)
 Device 000Bh LSI53C896/7 PCI to Dual Channel Ultra2 SCSI Multifunction Controller
 Subsystem ID 10201000h LSI21002 PCI to Dual Channel Ultra2 SCSI host adapter
 System IRQ 11, INT# A

IRQ Summary: IRQs 3,5,10,11,14,15 are used by PCI devices
Shared IRQs: IRQ 3 is shared by 2 PCI Devices (USB 1.0 & USB 2.0)
             IRQ 5 is shared by 5 PCI Devices (Audio, USB 1.0, SMBus, SCSI, NIC)
             IRQ 10 is shared by 2 PCI Devices (USB 1.0, video)
             IRQ 11 is shared by 3 PCI Devices (USB 1.0, SCSI)

Note that INTs can have subversions A, B, C or D.

Linux doesn't stop at INT15:

  0:    2532054    IO-APIC-edge  timer
  1:       5076    IO-APIC-edge  i8042
  2:          0          XT-PIC  cascade
  8:          1    IO-APIC-edge  rtc
 12:       9229    IO-APIC-edge  i8042
 14:      22159    IO-APIC-edge  ide0
 16:        114   IO-APIC-level  uhci_hcd, HDA Intel
 18:          0   IO-APIC-level  uhci_hcd
 19:      54645   IO-APIC-level  libata, sym53c8xx, uhci_hcd
 20:         30   IO-APIC-level  sym53c8xx
 23:          0   IO-APIC-level  uhci_hcd, ehci_hcd

Windoze XP doesn't stop at 15 either. This is a modern OS feature OS/2
is missing, APIC, for Advanced Programmable Interrupt Controller.
-- 
"Love does not demand its own way."                1 Corinthians 13:5

 Team OS/2 ** Reg. Linux User #211409

Felix Miata  ***  http://members.ij.net/mrmazda/



 
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