crystal.bk : cryst-4.fb4 Page 86 Monday, March 23, 1998 4:09 AM

4 Technical Information

System Specifications

IRQs, DMAs, and I/O Addresses Used by Your PC Workstation

The IRQ, DMA, and I/O address mappings shown here are for a basic configuration. The resources used by your PC Workstation may vary, depending on which accessory boards are bundled with the

PC Workstation. Resources are allocated by the system BIOS or the Plug and Play operating system.

IRQs used by

IRQ0

System timer

PC Workstation

IRQ1

Keyboard controller

 

IRQ2

Free

 

IRQ3

COM2, COM4

 

IRQ4

COM1, COM3

 

IRQ5

AD1816, LPT2

 

IRQ6

Flexible disk drive controller

 

IRQ7

LPT1

 

IRQ8

Real-time clock

 

IRQ9

 

 

IRQ10

 

 

IRQ11

AD1816 MIDI

 

IRQ12

Mouse

 

IRQ13

Not connected

 

IRQ14

Integrated IDE controller

 

IRQ15

 

 

 

 

 

 

 

DMAs used by

DMA 0

Capture

PC Workstation

DMA 1

Playback

 

DMA 2

Flexible disk drive controller

 

DMA 3

LPT ECP

 

DMA 4

Cascade

 

DMA 5

free

 

DMA 6

free

 

DMA 7

free

 

 

 

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