VGA VLB Cirrus logic JDF CL5426, basic info \ VOGONS

VGA VLB Cirrus logic JDF CL5426, basic info

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First post, by retro games 100

Posted on 2011-04-13, 17:07

retro games 100 Offline

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Introduction
I am testing a VGA VLB Cirrus Logic JDF 2themax CL5426 video card. The PCB says FCC ID JDF etc. Who are JDF, I wonder? The image quality seems quite good. I wonder which is the best chipset: the 5426 or the 5428? It has 2MB of RAM.

I have installed the software for this card (available below as a link), and it includes a useful util called IDchip.exe. I ran it, and it displays info about the card, including its BIOS and available modes. I've included this info as a .txt attachment, below. Also, there is a monitor timings .dat file. It may be of interest to someone. It's here.

1) Link to Cirrus Logic 5426/28 driver and utilities, for DOS and Windows 3.x
2) Link to older Cirrus Logic 5426/28 driver and utilities, for DOS and Windows 3.x

Notes
1) I reckon this software is fairly up to date. One of the help screens says Beta. I got it from DriverGuide. I tested both the DOS utilities, the Windows 3.x driver, and the Windows 3.x utility. It all worked. The setres.exe won't let me set the resolution to 1280x1024 and have an LCD friendly refresh rate of <= 75 Hz.
2) Again, I found this software on DriverGuide, and is available here for convenience. I tested it in DOS and Windows 3.11, and it worked.

Benchmarks
I'm testing this card on an Asus VL/I-486SV2GX4 revision 2.1 mobo. It has an AMD-X5 (P75 5x86 133MHz) CPU in it, with 1 stick of 16MB FPM. I have been using 3DBench version 1.0, Quake, Doom, and WinTune 2.0 for Windows 3.x. For all of these tests, I have run them using the mobo's FSB settings of 33, 40 and also 50. For the 50 FSB tests, I set the AMD X5's multi to 3x, and set the BIOS DRAM timings to "slower".

3Dbench 1.0
33 fsb = 76.9
40 fsb = 90.9
50* fsb = 83.3

Quake shareware 1.06, fullscreen timedemo demo1
33 fsb = 11.1
40 fsb = 13.3
50* fsb = 12.4

Doom shareware 1.9s, fullscreen timedemo demo3
33 fsb = 2134/1769
40 fsb = 2134/1571
50* fsb = 2134/1626

PcpBench, vgamode
33 fsb = 16.4
40 fsb = 19.7
50* fsb = 18.3

Wintune 2.0 for windows 3.11
40 fsb

50* fsb

*For the 50 FSB tests, I set the AMD X5's multi to 3x, and set the BIOS DRAM timings to "slower".

Reply 1 of 1, by Old Thrashbarg

Posted on 2011-04-13, 18:02

Old Thrashbarg Offline

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Joined: 2009-06-08, 14:30
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I wonder which is the best chipset: the 5426 or the 5428?

The 5428 is an improved version of the 5426, with some faster acceleration capabilities. It's not a huge difference... with all other things being equal, I believe the 5428 is about 10-15% faster under Windows (which seems to be in keeping with your Wintune results for the two cards). The two chips should be pretty much identical under DOS.

As for the FCC ID, you may want to add the FCC ID lookup to your bookmarks. In this case, the 'JDF' grantee code is for TNC Chemical Co., who you've probably never heard of on their own, but they own(ed?) the 2 the Max brand, and are probably better known for buying out Gainward in the mid-late '90s.

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