Video Controller - NEC PowerMate VP75 User Manual

Table Section 1-4 Interrupt Level Assignments
Interrupt Priority
IRQ02
IRQ03
IRQ04
IRQ05
IRQ06
IRQ07
IRQ08
IRQ09
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
*Industry standard locations

Video Controller

The Circus Logic CLDG5434 PCI graphics controller combines powerful elements aimed at ad-
dressing the requirements of personal computer designs. State of the art techniques have been
added for optimizing performance in computer graphic intensive applications and graphical user
interfaces (GUI). A variety of industry standard 32-bit local bus interfaces are integrated on chip.
The key is that local bus interfaces are 32-bit wide.
Included in the video controller are cost saving features such as an integrated palette DAC and
clock synthesizer along with integrated support for multiple bus interfaces and flexible DRAM-
based display memory configurations.
The TrueColor RAMDAC provides 24-bit true color. The integrated dual clock synthesizer al-
lows full programmability of MCLK (memory clock) and PCLK (pixel clock). The integrated
clock synthesizer supports frequencies from 390 kHz to 120 MHz. The CLDG5434 supports up
to 2 MB of display memory. The video memory is 256K x 16 DRAM.
Technical Information
Interrupt Device
Cascade (INT output from slave)
COM2*
COM1*
Parallel Port 2
Diskette Drive Controller*
Parallel Port 1*
Real-time clock
Available
Available
Available
PS/2 mouse*
Coprocessor
Primary IDE
Secondary IDE
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