Tseng Labs, Inc.
ET4000 well-established non-accelerated chipset. W32 series accelerated.
ET4000/W32i and W32p support smart 32-bit interleaved memory interface
with 2Mb DRAM installed, yielding 85% of the video memory bandwidth of a
ET4000AX Old ISA chipset, VLB OK (16-bit host interface,
ET4000/W32 Accelerated, 32-bit host interface. 32-bit memory
interface. Fair performance, comparable to
ET4000/W32i Improved acceleration, supports interleaved memory
with 2Mb. Very fast blits.
ET4000/W32p Improved acceleration, better host bus interface
support (incl. PCI). Special video support.
Performance: W32: Mediocre, comparable to Cirrus 5426.
W32i/p with 1Mb: Fair.
W32i/p with 2Mb: Good, very fast blits.
DOS perf: Very good, but depends on card design.
Max. resolutions depend on RAMDAC.
Max. res 8bpp: 1280x1024 @ 72 Hz
Max. res 16bpp: 1024x768 @ 72 Hz (W32p)
Max. res 24bpp: 800x600 @ 72 Hz (24-bit pixels).
Unknown (32-bit pixels).
BIOS: VESA BIOS support built-in, not all. Unknown.
Generic ET4000/W32p $100, with 2Mb $150.
Brand-name: Diamond Stealth 32 2Mb $170.
ET4000/W32i and W32p take big advantage of second Mb of memory.
Reputation for good DOS performance, but varies a bit between