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ST-4182E Whats a good controller to get for it ESDI?

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    1st choice of a controller I'm considering. ULTRASTOR - 802-18009-02B U12F


      Originally posted by framer View Post
      1st choice of a controller I'm considering. ULTRASTOR - 802-18009-02B U12F
      Hey! That's the one I recommended.


        Well I pony up more than I should have but it was the cheapest on FleaBay... $35.00. I almost forgot it was listed as a EDSI controller



 opposed to an EDSEL controller?


            That a hoot....


              Well the eBay deal for the LTRASTOR - 802-18009-02B U12F went south. I was sent a PCI video card which I finally got the shipping label to send it back and hopefully get refunded.

              The seller could not find the correct card.

              Well I bought a DCT-6180-15T and have questions.

              Should drive be setup as drive select 1? Should the cable have no twist?

              I can only find the doc's on DCT6180-15TX

              The differences I'm looking at is W4 default is for a 32k SRAM where my board has a 8k SRAM so I'm closing pin 2 & 3 to select 8K

              My board has no jumpers for W2 W3 so they are open by default.

              I'm hoping the switch setting are correct

              SW1-1 closed factory configured default
              SW1-2 Primary port 1F0h-1F7h enabled open default
              SW1-3 Auto-deselect disabled open default ---- what is this setting for?
              SW1-4 BIOS EPROM enabled closed default
              SW1-5 BIOS ADDRESS
              SW1-6 BIOS ADDRESS
              SW1-7 Interrupt after reset enabled closed default
              SW1-8 Track buffer enabled closed default

              Other issue I had to leave a ST-22 MFM floppy controller in the system to use the floppy drive. I set the AT bios to show no HD's installed. I changed the BIOS address on the DTC-1680-15T to D4000h

              My 1st attempt W4 was set wrong and I'm not sure on the cabling before I try again I would love to make sure on the cabling and if the switches have the same meaning between the DTC-6180--15t and the DTC-6180-15TX

              How should the led on the HD act before I run the debug program if it's setup correctly?

              Any help greatly appreciated...


                No twists in an ESDI cable, at least for primary--but if you do that, you can't have an MFM controller sharing that 1Fx address. I assume that you mean the DTC6180. You'll have to figure something out for the floppies. The DTC6280 has floppy support--and, in fact, can support 4 floppy drives.

                You might have luck setting the ST22 to secondary, BIOS disabled. That would be JP1 closed and JP3 closed. That would still let you use the FDC on the card.
                Last edited by Chuck(G); July 13, 2021, 10:49 AM.


                  I can only use the floppies on the primary setting JP1&2 open. I was already using the card with JP3 closed. I did try it open, no joy on the floppies. All this was done w/o the DTC card in the system.

                  FYI I've now tried 3 oddball MIO cards with floppy interfaces, after I disable the IDE port the floppies show as not working press F! and then they do work. I guess I need to locate a floppy only card that works with an AT. I also tried 2 8bit XT HD cards with the same results.

                  I think plan B buy another ESDI card with a floppy interface. Insane hobbyist working here...


                    If you've got a SCSI controller with floppy, you could always try that--there's no port conflict there.


                      Yes I do. I also just found a sysgen omni2bridge 8 bit controller that I can disable the BIOS and use in an AT. FYI this is being done in a IBM 5162 system.

                      I have to stop now before for wife forgets I exist. I'll continue tomorrow.

                      Thanks for Chuck for that SCSI tip. I'll try that if the Sysgen card fail to work. I'm betting it just might be what I needed.


                        The Omnibridge card should work--it uses a WD37C65 FDC IIRC, so very PC-compatible.


                          All the MIO's I tried, setup to just use the floppy controller, and all the 8 bit HD floppy controllers including the Sysgen one, always show a 601 error press F1 and then it boots from floppy. The DTC-6180 card is not in the computer. I still don't understand this. The ST-22 floppy controller works and boots perfect on the primary setting. I was able to install the DTC-6140 and bring up the bios program to LL format the drive by setting JP1 OPEN JP2 CLOSED that used HD port address 1F0-1F7, 3F6-3F7; however, the HD led remains on the LL format program does't find a drive.

                          I need to locate a card that has a floppy controller built in. I'm also out of slots and to use a separate floppy controller I've been pulling out my network card.

                          FYI I did select no BIOS on the Sysgen card SW2 was all off.
                          I did try the Adaptec AHA-1540CF and got the same issue as all the other floppy controllers.

                          I'm using Gsetup to setup the CMOS.


                            The Sysgen with bios disabled is a plain old AT-compatible controller as far as the system is concerned--assuming that it's set as 3fx,IRQ 6, DMA 2.

                            Well, like I mentioned, I've got two DTC controllers, the one I've used most is the 6282, which does have a floppy controller.


                              Working with the AHA-1540CF SCSI adapter I got it 1st showed a 601 error w/o the DTC6180 in the system but after I pressed F1 it booted to the floppy. I put the DTC6180 in with
                              SW1-1 on FACTORY SET
                              SW1-2 OFF Primary port1F0h-1F7h
                              SW1-3 OFF Auto-deselect disabled
                              SW1-4 ON Bios EPROM enabled
                              SW1-5 OFF BIOS ADDRESS C8000h
                              SW1-6 OFF w/sw1-5
                              SW1-7 ON Interrupt after reset enabled
                              SW1-8 ON Track buffer enabled

                              On boot to floppy it no longer had the 601 error. I was able to run Debug g=c800:5 program to LL format and verify the drive. I fdisk'd and formatted the drive with 3.3 DOS and transfer the system. The computer booted successfully to the C: drive.

                              Now the weird issue. The LED on the HD is always on. What am I missing. The LED has never shut off from the start of the process.

                              Does the LED on the drive show it the selected drive? The LED connected to the DTC6180 show the drive working normally.
                              Last edited by framer; July 16, 2021, 07:38 AM.


                                Since this is the only drive on the controller, I think that your explanation is reasonable. The LED and bezel on my ESDI drives were removed as part of the installation, so I can't say much more than that.