Dma Channels; Interrupt Request (Irq) Lines; Onboard Pci-Ide - TMC TI7NBF User Manual

3.6 DMA Channels

There are seven DMA channels available on the motherboard. Only
DMA2 is used by the floppy controller. In the case that ECP mode on the
parallel port is utilized, DMA1 or DMA3 will be used.

3.7 Interrupt Request (IRQ) Lines

There are a total of 15 IRQ lines available on the motherboard. Peripheral
devices use an interrupt request to notify the CPU for the service
required. The following table shows the IRQ lines used by the devices on
the motherboard:
Level
IRQ0
IRQ1
IRQ2
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7

3.8 Onboard PCI-IDE

The PCI-IDE controller is a part of the 82440BX or VIA 82C693 chipset.
It supports PIO mode 3/4 and bus mastering Ultra DMA/33. The peak
transfer rate of PIO mode 3/4 can be as high as 17MB/sec. Using HDDs
that support Ultra DMA/33, the peak transfer rate can reach 33MB/sec.
There are two IDE connectors - primary IDE and secondary IDE. With
two devices per connector, up to four IDE devices can be supported.
TI7NBF Socket 370 ATX Motherboard User's Manual
Chapter 3 Hardware Description
Function
System Timer Output
Keyboard
Interrupt Cascade
Real Time Clock
Software Redirected to Int 0Ah or PCI Slot Int#
Reserved or PCI Slot Int#
Reserved or PCI Slot Int#
PS/2 Mouse or PCI Slot Int#
Co-Processor
Primary IDE
Secondary IDE
Serial Port #2
Serial Port #1
Parallel Port #2 or PCI Slot Int#
Floppy Disk Controller
Parallel Port #1
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