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XTIDE Universal BIOS

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    Aitotat, looking back at the revisions to the bios in the last page of this thread, it implies that the XT-IDE program can burn ANY image to a blank chip of our choosing. That an accurate statement?
    Nothing beats the roar of a 36yr old drive coming to life after a decade in storagg

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      Yes, the XTIDE card uses 8kiB 28C64 EEPROMs and it is possible to flash anything to it with latest idecfg.com. Idecfg.com already supports 16kiB EEPROMs for any future revisions of XTIDE card.

      Comment


        Originally posted by aitotat View Post
        v2.08.01 (latest stable version at the moment). Yasm and old versions of Nasm cannot be used at the moment. Nasm 2.xx automatically converts near (16-bit offset) conditional jumps to short (8-bit offset) conditional jump + unconditional jump for 286 and older that do not support near conditional jumps. I don't like the automatic conversion at all. I found out about the conversion too late so now i need to fix the few remaining near conditional jumps (and maybe switch back to Yasm).
        I see you've changed the code to assemble with Yasm again.
        What version of Yasm are you using for the latest in SVN?

        Thanks, Bill

        Comment


          Yasm 1.0.1 (latest at the moment).

          Comment


            By the way, there is now modified reset function (AH=00h, Disk Controller Reset) on the SVN. It should now allow booting on IBM 5150 when no floppy drives are present.

            Previously any floppy or hard disk controller error halted booting since AH=00h returned error code. Now it returns error code for requested drive only and the requested drive is the one DOS tries to boot from.

            Comment


              Originally posted by aitotat View Post
              By the way, there is now modified reset function (AH=00h, Disk Controller Reset) on the SVN. It should now allow booting on IBM 5150 when no floppy drives are present.

              Previously any floppy or hard disk controller error halted booting since AH=00h returned error code. Now it returns error code for requested drive only and the requested drive is the one DOS tries to boot from.
              I did see that, thanks.../Bill

              Comment


                By the way, the XTIDE works in an IBM XT (256k motherboard), with an Intel Inboard 386.

                (both with a WD Caviar 1.6GB (WDAC21600-00H) hard drive and a SanDisk Ultra 2GB Compact Flash)

                /bill

                Comment


                  Originally posted by aitotat View Post
                  Yes, the XTIDE card uses 8kiB 28C64 EEPROMs and it is possible to flash anything to it with latest idecfg.com. Idecfg.com already supports 16kiB EEPROMs for any future revisions of XTIDE card.
                  Today I modified my XTIDE card to hold an ATMEL 28C256 32k EEPROM, and with jumpers to address 1/4, 1/2, or all of it.

                  A small change is needed in idecfg.com to program it properly. I have that working. When it's tested more I'll send it along for your consideration.

                  By the way -- your code is really nice. Very impressive piece of work!

                  Bill

                  Comment


                    Howd you mod the XTIDE for the 28C256 32k EEPROM and put jumpers to address it selectively AND chenge the idecfg.com program?
                    Nothing beats the roar of a 36yr old drive coming to life after a decade in storagg

                    Comment


                      Originally posted by k2x4b524[ View Post
                      Howd you mod the XTIDE for the 28C256 32k EEPROM and put jumpers to address it selectively AND chenge the idecfg.com program?
                      I'm going to post all that after it's rung out and I send it to the project principals.

                      Comment


                        I finally tested v1.1.1 with IBM 5150 and the boot problems are now fixed. It is now possible to boot from hard disks without floppy drives or floppy controller. v1.1.1 is now officially released and it can be found at google code.

                        That is the only change for v1.1.1. I'm currently rewriting all my library functions to save some space. It takes a lot of time so don't expect new features anytime soon.

                        wrljet, how hard is it to modify existing XTIDE card for 16 kiB or 32 kiB EEPROM? Can it be done with only extra wires and maybe resistors? I could really use more space and 16 kiB should be enough (for now).

                        Comment


                          Originally posted by aitotat View Post
                          wrljet, how hard is it to modify existing XTIDE card for 16 kiB or 32 kiB EEPROM? Can it be done with only extra wires and maybe resistors? I could really use more space and 16 kiB should be enough (for now).
                          I'll PM you on that, schematic, etc. The mod involves cutting two traces, and adding wires to jumpers. Unfortunately I haven't touched it since last weekend -- so no new progress or testing.

                          XTIDE-jumpers.jpg

                          XTIDE-mods.jpg

                          XTIDE-jumper-holes-closeup.jpg

                          /Bill

                          Comment


                            Please do not update to v1.1.1 if you have hard disks that are not controller by XTIDE Universal BIOS! I broke booting from foreign drives when i fixed the 5150 boot problem. I already fixed it but another problem came up.

                            I have one question that i hope someone can answer: does MS-DOS 3.30 support more than two hard disks? I have MFM drive as 80h and XTIDE Universal BIOS drives as 81h and 82h. MFM drive has MS-DOS 3.30 installed but i cannot boot from it when i have two IDE drives present. Booting is possible after i remove IDE slave drive.

                            I'd like to know if this is a DOS limitation and not a bug in XTIDE Universal BIOS.

                            Comment


                              I don't know about that Aitotat, My knowledge of 3.3 is limited, but it's old enough it may not want to deal with more than 2 drives. That or the bios on the mfm card hates XTIDE
                              Nothing beats the roar of a 36yr old drive coming to life after a decade in storagg

                              Comment


                                Hello,
                                First I want to thank you for this masterpiece of work, is really cool!
                                I instaled xtide universal bios 1.1.0 as option rom in a ne2000 isa nic on a IBM PS/2 Model 30-286, to manage the ide port of a sb 16 sound card. It recognizes the 512 mb microdive attached to a cf-ide adaptor and works totally reliable.

                                The only issue i have found is that if I boot from the original IBM hard drive (non ide) the microdrive dissapears and i can access only to the ibm drive as C: but if I boot from the microdrive, the IBM hard drive appears as D:

                                Is there a way to solve this behaviour?
                                Thanks again!
                                My videos:
                                IBM PS/1 model 2011 restored and enhanced
                                IBM PC Advanced Diagnostics Cassette load

                                Comment

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