I would like to swap the 80Mhz RamDAC for a 110Mhz RamDAC on an ET4000W32i ISA card. I once read that the clock generator chip ICS2494 can provide up to 135Mhz? Is this a pure software problem with the driver or do you have to change the external circuitry of the ICS2494 chip?

The card works better with a MUSIC TR9C1710 DAC but on the Atari only at 1024x768 and 640x480 under 2/16/256 Colors. 800x600 in any colors give a black screen. I check it not with Windows ...

The card now works with the ICS1394... Windows 95 works with the standard Windows driver at 640x480 at 16 colors. If the Windows 95 TSENG ET4000 driver is installed, nothing works anymore, i.e. the screen goes black and stays black. The problem is that the card doesn't have a name and I can't search …

I buy a ICS1394 from Ebay and test it ...

Pin1 is marked on the soldering side of the PCB with a square via. Pin1 = GND Pin2 Pin3 = over 10R (R38) to VCC Pin4 Pin5 = Quartz 14,xxx Mhz Pin6 = Quartz 14,xxx Mhz Pin7 = Quartz oscillator 44,xxx Mhz Pin8 = GND Pin9 Pin10 = VCC Pin11 Pin12 Pin13 Pin14 Pin15 Pin16 Pin17 = GND Pin18 Pin19 Pin20 VCC …

You say it remains dead, does that mean no VGA output or the BIOS gives the "no VGA" beep code error? ... no Output the Monitor is black, no Sync. No beep #1 - please verify the ICS PLL chip - Is that definitely installed the right way around? More significantly, is it even the right chip? ICS2494 …

I have only a 486 PCI/ISA Mainboard for testing with DOS 6.22 and Windows. And a Atari ST TOS 68k Computer with a ET4000 Adapter Card. With the Atari all ET4000 cards work without any BIOS Rom on the graphiccard the card. The card is on both dead !

You are right. But the card is even dead with 70ns DRAM chips. The card must do anything? The 100ns is a minimum speed and can definitely be faster. There are the same chips in another card and the card works perfectly at 1024x768 and 256 colors without any problems ... Filename ET4000AX_T0.jpg …

There are two scratches, but I checked and the connections are ok. The DRAM chips are fast enough. I also have it on another ET4000. 70ns chips make no difference. Filename front.jpg File size 778.38 KiB Views 1206 views Filename back.jpg File size 482.84 KiB Views 1206 views Filename et4000ax_1. …

I have a defective ET4000AX ISA graphics card. The card came without DRAM, RamDAC and the Clockgenerator Chip. I plugged everything in and the card remains dead in an ISA 486 mainboard. All additional components attached have been tested and work. The card has no label and no FCC ID. Does anyone …