Problems with a Set 5.24 Dev Box

Discussion in 'Sega Dreamcast Development and Research' started by manolo, Nov 5, 2008.

  1. manolo

    manolo Member

    Joined:
    Nov 4, 2008
    Messages:
    24
    Likes Received:
    2
    Hello there folks,

    I'm completely new to the forums in terms of posting, but today I felt I needed help getting my HKT-0120 running - and thought here was the right place to ask.
    I've been reading loads of threads here, first purely for informational purposes - now looking for advice on how to determine what might be wrong with my setup:

    Set 5.24 HKT-0120 DC Dev Box
    P2 400MHz PC
    Adaptec 2940UW SCSI Card (68-pin external SCSI connector)
    No-Name 50<>68 pin external SCSI cable
    No-Name 50 pin active SCSI terminator x2
    Standard DC Pad w/ 2 VMUs attached

    My problem is (as many others seem to have experienced...) that the Adaptec Card shows no devices attached on bootup.

    The dial switches are set to 4 and 3, the SCSI terminators are plugged into SCSI-B and the GD-Writer port, but only the LED of the terminator plugged into the GD-Writer port lights up (so the terminators themselves seem ok).
    It appears this might indicate a problem with the PSU, according to some older posts I found?

    I tried switching the PC on after all possible different intervals from 15 secs after booting up the dev box until 5 minutes after - nothing is ever found, the Adaptec card reports "nothing attached!" or something similar I can't recall right now and then tries to boot into the freshly installed Win98SE, but fails to do so if the dev box is attached to the SCSI card.
    The PC will ONLY boot into Win98 if the cable is NOT connected. Otherwise it will hang after the first Win98 logo screen, back at the black keyboard driver loading screen. It will boot into safe mode though...

    The dev box itself will power up ok (as far as i can tell since it seems to be in emulation mode?), the green light at the top is on and the three orange lights seem to blink in a reconstructable way.
    I've connected a cinch audio cable (red/white wires) and a VGA cable, set the slide switch to the left, the rotary switch to "9" for PAL and the dip switches to on on off off, which should result in VGA output.
    Also when I turn on the box and check my TFT's information tab, I can see it reacts on the box - it turns to a resolution of 640x480, a horizontal frequency of 31kHz, a vertical frequency of 60Hz and pixel clock 26MHz.

    Some other facts:
    - When I got the box, i heard a noise inside when carefully 'shaking' it. Turned out to be a screw that hung between the PSU and the metal cage above it... I didn't investigate that any further yet.
    - The VMU in the controller beeps on bootup, like on a normal DC.
    - The box's HD is a Quantum Fireball with no size written on the label.. does this seem to be a stock HDD or rather an exchanged one? Anyways, I can hear it working on bootup.
    - I don't have an internal 50 pin SCSI cable around at the moment for looking onto the HDD by itself
    - I have read Mark30001's "Tutorial: Switching an HKT-01 Dev.Box from Emulation to GD-ROM Mode (Without SDK)" but personally I am not too keen on switching modes that way, even though it seems to be a good guide.
    - I opened the box up once again and removed the outer case, the front and the metal thing covering the HDD and the boards. I've checked all connectors that were reachable after partial disassembly, they seemed fine.
    - The yellow tape is still over the cable on the side of the unit

    If anybody feels like they might point me in the right direction, please feel free to do so...


    What I was thinking about trying next (this weekend) were:
    - Looking into the assigned IRQs/testing the card in another PCI slot
    - Exchanging the PC with another pretty old one I got lying around that should have Win98 installed
    - Exchanging the dev box's PSU
    - Changing the card's settings - can anyone recommend settings for this particular card? I've loaded factory defaults on both the mobo bios as well as on the Adaptec card but those and other settings had no effect for me.

    By the way, has anyone discovered what that 'big red button' is for? Seems tempting, but I'd rather get the box running first before randomly pushing hidden buttons ;)


    Thanks to you all for the great amount of information you collected on these forums, and especially of course to ASSEMbler and anyone who can help me out a bit!
     
  2. T_chan

    T_chan Gutsy Member

    Joined:
    Apr 13, 2008
    Messages:
    464
    Likes Received:
    64
    Hello,

    Lots of text, I'll try to answer a few questions :)
    - I've only heard of 4gb Seagate Medalists in the devkits, so the quantum fireball is probably a replacement
    - Why stick to Win98 ? I have WinXP sp2, and no problems to access the devkit
    - you can also try to connect the fireball to your SCSI card directly as an easy check to see if the card & the drive are ok
     
  3. Dreamcast

    Dreamcast Intrepid Member

    Joined:
    Jul 17, 2007
    Messages:
    619
    Likes Received:
    35
    The operating system shouldn't matter as the card itself checks for devices before Windows boots. If you're not seeing anything, it's either a bad SCSI interface card or a power supply issue in the dev kit (what I experienced). T_chan's advice about the hard drive is a good idea to ensure the interface card is operating properly. And yes, Seagate Medalist drives were the stock drives used in at least the 5.24 kits.
     
  4. manolo

    manolo Member

    Joined:
    Nov 4, 2008
    Messages:
    24
    Likes Received:
    2
    I was going for Win98 since I thought 2000, NT and XP (and Vista probably...) couldn't handle FAT16 right, and therefore only 2GB of the HDD would be accessible? Something like that...
    Anyways, I'll try hooking everything up again (on that other PC as well) this weekend since I don't have the internal cable yet, and see how that goes.
    Then hopefully the cable will arrive and I can give everything a closer look.
    I don't even know how big the HDD is yet... probably full of porn and mp3s, like it seems to be usual for those kits ;) We'll see.

    Thanks for the answers!
     
  5. Evangelion

    Evangelion Spirited Member

    Joined:
    Jul 20, 2008
    Messages:
    108
    Likes Received:
    2
    FAT16 is limited to 2GB

    But you can format the HDD in FAT32 or NTFS, both are supported by Set 5.24.
     
  6. manolo

    manolo Member

    Joined:
    Nov 4, 2008
    Messages:
    24
    Likes Received:
    2
    Thanks for clearing that up.
    So each box originally had a HDD with two partitions @2GB @FAT16, and when hooked up to 2k/NT/XP only the first one was visible? I'm really starting to believe I made the last part up since nobody mentioned that clearly yet...
    Or was the second partition even completely unused until 'properly' formatted?! I'll try to dig out some of the older threads in which I believe I read something similar.

    Well, it won't matter for this box here since it seems the HDD is a replacement anyways, and probably formatted with FAT32 or NTFS already then.
    But it's good to know!

    By the way, was anybody able to get SCSI equipment from normal, local pc-stores? I've been through all I could find here, and none had anything SCSI related.. so eBay will have to do and I still can't hook the HDD up yet.
    The servers we got at work all run on normal household SATA drives, so no luck there either.

    Does the terminator lighting thing ring any bells? It seems a bit strange only one would light up, but I believe I also read that no terminators where needed at all to just establish the connection pc <> dev box.

    However, thanks again, and have a nice weekend everybody!
     
  7. T_chan

    T_chan Gutsy Member

    Joined:
    Apr 13, 2008
    Messages:
    464
    Likes Received:
    64
    SCSI equipment was always rare, when I needed some I used to go to Mac shops... but when I needed some stuff a few months ago, ebay had everything I needed at interesting prices...
    For the terminator: no need to put one on the "For GD-Writer" connector. Only on "SCSI-B" is enough. And that one is lightning when my PC is powered (never bothered with the "For GD-Writer" connector).
     
  8. Storm

    Storm Robust Member

    Joined:
    May 1, 2008
    Messages:
    228
    Likes Received:
    1
    You remember the two partition thing correctly. It's in readme.txt for your SDK. non-NT will see both drives. NT will not. And since NT*/2k/XP/Vista has an NT kernel you wont see them there. You should dump the disk raw, so the choice of OS will not matter for access, but it's better if you do not boot it up with something that will recognice it since just mounting the device will change bits on it.

    The best thing to do is to detach the HDD and connect it directly to your SCSI card and then dump it with Linux or similar that ships with the tools to do it out of the box.
     
    Last edited: Nov 17, 2008
sonicdude10
Draft saved Draft deleted
Insert every image as a...
  1.  0%

Share This Page