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Voyetra Sequencer & Hardware PC DOS midi Setup

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  • #16
    Found this while cleaning out the shack today, think this is the place for it...

    The obvious questions are:

    * Did anyone ever get a Voyetra t-shirt??
    * Did anyone get a V22 to V24 upgrade kit - and if so, what was in it? especially the documentation!!
    Attached Files
    jUst plAythAtbEAt


    • #17
      Manual is online here:
      jUst plAythAtbEAt


      • #18
        Any of You who use Voyetra still may have come across the MEMORY FULL error at some stage. This is when you switch to R (Record) Mode, only to have the sequencer lock up, and the available memory shrink to zero. A hard reset is required.

        This appears to be the early stages of RAM ROT.

        My machine has 512MB of ram so i can run Linux dual-boot with Dos 6.22 (as You do) even though i only need 1mb of ram to run voyetra in Dos 6.22 with things loaded high etc.

        Last week i had a major freeze - i have about 1 a year at most - but on reboot, the bios in my Dell GX1 disabled one of the RAM sticks! I pulled it - a 128MB PC100 stick, and everything returned to normal. No issues since.

        Not much to say here, just that if You have far too much ram, like 512x the amount you need, you are possibly asking for issues to emerge.

        jUst plAythAtbEAt


        • #19
          Been searching hard for a hardware sequencer that can play MIDI files - .MID Type 0 or whatever, so i can run some complex layering with Arkaos in my videomixes, instead of leaving it to randomness.

          Looks like such a machine does not really exist. So, as usual, Voyetra & a DOS machine comes to the rescue.

          Check this out, the NIXDORF BEETLE/M - A "POS" Computer, that is, a "point of sale" machine, aka a fuc*ing Cash Register!

          Manual is here:


          Footprint: Width 280 mm Depth (including cable cover) 350 mm Height 137 mm
          Weight: approx. 7 kg
          Input voltage: 100-120 V200- 240 V
          Power consumption: 3A / 5A
          Frequency of system voltage: 50/60 Hz
          Noise Development Acc. to GPSGV: 60 dB(A) or less

          So, basically, this is a 1.2Ghz machine, Parallel port, Floppy Drive, Hard drive, Has 1 x ISA slot, and apparently/optionally 2 PCi slots? It's also useable in the USA & Japan, as well as UK and EU. It also supports a UPS style battery option to smooth out spikes in live situations also.

          The vendor is and he appears to have a shitload of vintage computer gear, and a good selection of industrial machines like this one above.

          I like it's tiny footprint, and industrial heritage, it could be the killer portable sequencer, given that laptops only really support Parallel devices and if You are lucky, Joystick port MIDI via SB emulation. Let's all accept that Laptops with ISA slots are now all in the hands of Youtubers, with blurry GP screens and failing caps, and to go portable with SEQ+, this is looking like a good 'best case'. Sure , You need a PS2 Keyboard and monitor, but hey, such is life.. It has VGA out, so no big deal.

          OK, it's not IDEAL, with only 1 ISA slot, but Theoretically, You should be able to run an ISA Soundblaster in it at the very least, and at best, an ISA Voyetra card and a parallel device side by side? Maybe?

          I am ordering one. < 100euro? Report to follow.
          Attached Files
          jUst plAythAtbEAt


          • #20
            So this Nixdorf Cash Register thing arrived! Very well packed, intact. it's 10.5" x 11" x 5" in size, has 3 fans - 1 in the PSU and 1 either side of the case - silent it aint. Has 256mb of ram, 1.3ghz Celeron, and shipped with a noisy enough hard drive (EIDE) that had a german install of DOS 6.22, and a selection of apps and some games. It has 3.5" floppy 1.44mb drive also, which was a bit hit & miss with my 30yo floppies, so i used a more recent sony drive for the Dos build.

            The BIOS is action-packed, including options for the on-board 3 serial ports, and plenty of crap about PCI this and ISA that. You need to do the usual - kill everything in the Bios, especially the PS2 mouse support, and SAVE it off. The ISA slot appears to have some special settings available for reservation of memory blocks and IRQs, which is interesting. This machine could use a Touch-display that used ISA perhaps? NVM, no need to change anything, leave as stock. Also, The machine is Y2k compatible, so dates are correct.

            First stop was to remove the HDD and replace it with an SD solution. This was a total PITA, as i just could not find anything later than Dos 5.0 on floppy for the install. ended up here: and hacking together a set of install floppies by mounting the .img files in Linux, dragging over the contents to the SD built in Dos 5, then using a surviving 6.2 boot floppy i had to boot with SD available, "SYS"-ing a floppy, then copying across the contents for "DISK 1" - with 6 spaces between the "DISK" and the "1" (it needs that exact label) of the UPGRADE version of Dos 6.2, and so on, then upgrading Dos 5 to 6.2. After doing this, EMM386 would not load, so i swapped it out for the one that came with Caldera OpenDos 7.x, and i was able to LOADHIGH and so on, giving 341248 bytes free on start - a new record for me. The install of Voyetra SPG and driver for the MPU401 clone mentioned previously in this thread (Jumper to IRQ3) went smoothly. Starting SPG still has that annoying hang for a minute or so, but once passed, everything is fine. I looped a song for 8 hours at 190bpm and it's still solid!! I noticed that the MIDITEST will fail the second stage if You try it, but it still appears to function fine.

            I really want to use my spare spare V22s in this machine, so i can have 2 x 2 ports - but i have no breakout lead. SO, i have ordered female DIN plugs, and a parallel lead, and i will make a breakout myself. I'll publish the PINOUT FOR VOYETRA V22s here when i have it done & working.

            So, bottom line on this - it WORKS. Only a single ISA slot, but at 1.3ghz, this is the fastest ISA machine i have. BUY NOW.
            Last edited by playthatbeat; Wed 13-01-2021, 12:56 PM.
            jUst plAythAtbEAt


            • #21
              Motherboard manual for this Nixdorf Mini PC is here:

              Tried playing DOOM2 on it today, and ofc it ROCKS. Will do MIDI sound out of the MPU401, but the on board sound is the dreaded CS4299 AC97 crappenfest, so no digital sound in DOS AFAIK, You need windows or Linux. 98se might be an option, allowing games to be played in a DOS window?

              I will be loosing the floppy in this for a GoTEK, as floppies are the biggest PITA ever now - all rotting and drama. Most legacy disks are now out there as .img file anyway.

              Enabling the LEGACY USB support will allow the machine to attempt to boot from a USB stick, but I have not managed it yet - maybe some testing will deliver, but for now, i'm using the SD card on the IDE bus to run Dos6.2.

              On the IDE bus - the cable from the motherboard to the drive is NON STANDARD! the connection on the motherboard is reduced size. The Cable is single device only, but the bios supports 2 devices on each IDE port. You could, in theory, hack on a twin cable and run 2 devices, but i STRONGLY advise asking for a spare IDE cable to suit, as that will allow you to run a second IDE device, and open up doors for you.

              I have backed up & Gzipped my working 4gb SD card .img - It's bootable to Dos 6.2, has a full working install of SPG 4.11 and is set up for MPU401 on IRQ 3, there's also a second partition with DOOM and so on for testing. Email me or hit me up on Twitter if You want it @djmrspring

              So far - i love this little thing.
              jUst plAythAtbEAt


              • #22
                Voyetra V22 ISA midi interface Breakout lead pinouts - 4 x 5 Pin DIN female from 25pin Dsub female:

                (Plug) [pins on Din] [pin on 25 Dsub]

                (Red1) [-1-4-2-5-3-] \-/ [-NC-17-13-04-NC] (OUTPUT 1)

                (Red2) [-1-4-2-5-3-] \-/ [-NC-18-13-05-NC] (OUTPUT 2)

                (BlueA) [-1-4-2-5-3-] \-/ [-NC-02-NC-15-NC] (INPUT 1)

                (BlueB) [-1-4-2-5-3-] \-/ [-NC-03-NC-16-NC] (INPUT 2)

                25dsub.png midi female.png
                jUst plAythAtbEAt


                • #23
                  Now the (sort of) bad news.. The MIDI IN on the MPU401 clone card does not work. No idea if this is a physical issue, the PC itself or the card, but it's no use to me, as i need this build to lock to SYNC IN. Using the musicQuest Parallel currently (working perfectly), on the Driver in the driver pack in this thread - SPG installer does not ship with the correct driver for it - will be swapping out for a V22s when i get the time. Shame.

                  [edit] There are options in the Bios to switch the ISA slot functions and priority - it's included for the installation of a visual/touch screen style interface, i suspect for self-service vending when combined with a scales and printer perhaps? I have NOT set any such priority, leaving things as they are - maybe things would improve with the MPU401 if i fiddle with these variables? MEANWHILE, a quick install of the V22 resulted in the dreaded lockup on Bar 4! So i am back on the parallel device for now. OFC i forgot the driver in 4.11 for the V22 is broken, so i will switch back using the driver in the 'final pack' or maybe some earlier ones at some stage. I also still have a V22m - where port 2 is MPU401 enabled - i can also try this i guess?
                  Last edited by playthatbeat; Tue 19-01-2021, 11:29 AM.
                  jUst plAythAtbEAt