General Specifications For The Vfx-M - Rastergraf VFX-M User Manual

Rastergraf

1.4 General Specifications for the VFX-M

Graphics Processor:
Display Memory (VRAM): The VFX-M display memory 128-bits/word, byte
Pixmap Memory (DRAM): Memory is 64 MB of 128-bits/word, byte addressable, no-
EEPROM Memory:
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50 MHz Number Nine I128S2 High Performance 128-Bit
Graphics and Multimedia Processor. Has a 128-bit vector
and pix-blt functions and programmable video timing. The
I128S2 provides support for VRAM color and write-per-bit
register special functions.
The maximum supported frequencies are 220 MHz for the
pixel clock and 100 MHz for the memory clock.
addressable, no-wait state, dual-port VRAM
The small size of the VFX-M limits the choice of display
memory (VRAM) to either 4 MB or 8 MB. The standard
VFX-M is built with 8 MB, as this provides the greatest
flexibility. However, the 4 MB version is available by
special order.
8 MB of VRAM gives five pages of 1600 x 1280 using 8-
bit pixels, two pages using 16-bit pixels, or one page using
32 bpp.
wait state, dynamic RAM. This memory is in the same
memory space as the display memory, so it can hold
program store and pixmap display data.
In the case of DRAM, there are two choices of DRAM
size: all or nothing: Giving up the DRAM can save
significant cost, but for X Windows applications
(especially) you will suffer a significant loss of
performance.
One 8-bit Flash EEPROM supports a 128 KB 8-bit wide
permanent storage. Normally, it is programmed with a
VGA BIOS.
A 2 KBit (256 byte) serial EEPROM, programmed via
I128S2 DDC control lines, supplies non-volatile read-
mostly memory to retain some changeable data during
power down.
General Information 1-7