1-18 Technical Information
Sound Integrated Circuit
The ESS Technologies chip set ES1869A provides dynamic audio circuitry with the fol-
lowing:
Audio digital processor
Plug and Play support
High-performance 16-bit Stereo Codec
Full-duplex operation for simultaneous record and playback
Analog joystick quad timer and digital joystick support.
Interrupt Controllers
Using interrupts, it is possible to change the system’s code sequence. To change the se-
quence, reassign the interrupt-levels. Fifteen interrupts can be used with a cascade connec-
tion of two 82C59 interrupt controllers.
Interrupt-level assignments 0 through 15 are listed in Table 1-4, in order of decreasing
priority.
Table 1-4 Interrupt Controllers
Channel
Device
IRQ00
System Timer
IRQ01
Keyboard
IRQ02
Second Interrupt Controller
IRQ03
COM2 (internal IR port)
IRQ04
COM1 (internal serial port)
IRQ05
Sound Chip, MIDI (default)
IRQ06
Floppy Disk Drive Controller
IRQ07
LPT1 Default (internal printer port)
IRQ08
Real Time Clock
IRQ09
USB
IRQ10
Not Used
IRQ11
CardBus controller
IRQ12
Internal Glide Pointer or External
PS/2 Mouse
IRQ13
Co-Processor
IRQ14
Primary IDE (Hard Disk Drive)
IRQ15
Secondary IDE (CD-ROM)
