according to my tests it is almost the same as ET 6000

That's probably due lowered clocks. Does it work at 100 Mhz?

I've got a et6100 and a 6000 and when I did some benchmark tests with phils benchmark compilation in dos I couldn't see any difference performance wise.

AppleSauce wrote on 2022-09-04, 08:14:

I've got a et6100 and a 6000 and when I did some benchmark tests with phils benchmark compilation in dos I couldn't see any difference performance wise.

The Et6000 is clocked at 91,87 the ET6100 at 97,16.

I don't image to be any difference in DOS. But should be some in Windows.

According to my knowledge the Tseng Labs video card were best performance on dos, not in windows... I'm still puzzled about why the et 6100 is identified as 6000.

Special for googlebanned users “Newtown, Pa.–June 17, 1997–Tseng Labs Inc. (Newtown, Pa.) announced the availability of the ET6100, an enhanced version of its 128-bit ET6000 2-D Graphics and Multimedia Engine. The ET6100 features an integrated 175-MHz VGA-compatible LUT-DAC and delivers increased display bandwidth to support additional high resolution modes. These new modes include 1280 by 1024 16-bit at 75 Hz, 1024 by 768 24- bit at 85 Hz, and 1600 by 1200 in 8- and 16-bit pixel depths”
So… just higher refresh rates in higher resolutions.

Higher refresh rates and built-in mpeg hardware decoding is the difference.

Nemo1985 wrote on 2022-09-03, 20:34:

Hello, I have such video card, according to my tests it is almost the same as ET 6000, but I have one quirk, the vga is identified as et 6000, which makes me wonder, is there any other fellow vogonians that has a et 6100 and can confirm (or not) this quirk?

Also is anyone willing to share the et 6100 bios? Apparently nowhere can be found.

I significantly rewrote the xorg/xfree86 driver back in 2005/2006, to remove some historical wrong turn in XFree86 display driver infrastructure pertaining to modeselection with respect to pixelclocks and external ramdacs (et4000 and earlier)., so my synapses remembered this being some revisional difference only.

According to tseng_driver.c in xf86-video-tseng both the et6000 and et6100 have the same pci-ids, and are only differentiated by pci device revision in the standard pci registers.

Let me see if i can dig up a dumped bios and stick it on vgamuseum or something.

Thank you for the information.
I was sure I pasted here my findings.
I did some benchmarks since I had 3 different ET6x00 cards:
Et6000 4mb 120ns
Et6000 4mb 100ns
Et6100 4mb 100ns
Performance wise there is pratically no difference.