Pinned replacing scsi cd-rom drive with scsi sd card adapter?

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    • Ok, so I just did a test using my extra long OEM SCSI cable and my older version SCSI2SD cards (the red one in this case). I mentioned earlier that I could not get the SCSI2SD boards working with the CPS3 OEM SCSI cable. But I was able to get the SCSI2SD card working with a shorter cheaper Chinese SCSI cable. Anyhow, I had some time on my hands and wanted to test if the longer cable was the root of my problem.

      I powered up the CPS3 with the extra long OEM SCSI cable connected to the SCSI2SD card and immediately encountered an error. I shut down the CPS3. The OEM cable was folded over several times with creasing in some spots. I straightened it out and removed any creasing best I could. Then powered on the board. Boom, it booted to the region select screen, I was able to select a region, the game booted up, and so therefore SCSI2SD works even with the extra long OEM SCSI cable.

      Moral of the story, within SCSI spec, doesn't appear that SCSI cable length was the root of my issue. Seems cable integrity and/or quality may be the root of the problem. I was able to fix this by waving out creases in the SCSI ribbon cable and perhaps that made that twisted strands in the cable connect better. Or signal reflection was eliminated when doing this. Seems the SCSI2SD board is much more sensitive to signal attenuation than SCSI devices of old.

      Anyways, you guys out there with the 5.1v of the board that are having issues, I think it is related to your cable as there are reports here that the 5.1v does indeed work with the CPS3. Wave out those kinks/get additional cables/press in the retaining clip on the back of the cable connectors to get better bite from the pins onto the signal wires or whatever you need to get going.

      Good luck!

      EDIT: I'll try to reproduce this and record a video.
      Arcade Multi Systems:
      • Sega: ST-V, Naomi w/Net Dimm, Naomi w/CF Boot (DIY and OG versions), Taito: G Net, Taito F3, Taito Type X², Capcom CPS2, Capcom CPS3, Neo Geo MVS 4-Slot
      Favorite Arcade Genres (in order):
      • Fighting games, Shmups, Light-gun, Puzzlers, Driving
    • When I did have the 5.1 board, I would test it outside the case with the cable stretched out and still encounter issues. It would detect the board, but would just hang on the "Reading disc". I truly believe my issue was related to a power supply, because every power supply I tested on it that didn't have a 3.3v rail it would boot fine and play with no issues. All my cabinets have a 3.3v rail, so it was pointless to keep the 5.1 rev.

      I feel if you want it to just "work" without having any issues, the 5.0a+b rev boards are what you want
    • BlinG wrote:

      I feel if you want it to just "work" without having any issues, the 5.0a+b rev boards are what you want
      I have both 5.0a and 5.0b boards. Have issues with them both and seem to be cable related. Don't have a 5.1 board, so no way I can validate if your mention of the 3.3v rail being the problem; will take your word for it.
      Arcade Multi Systems:
      • Sega: ST-V, Naomi w/Net Dimm, Naomi w/CF Boot (DIY and OG versions), Taito: G Net, Taito F3, Taito Type X², Capcom CPS2, Capcom CPS3, Neo Geo MVS 4-Slot
      Favorite Arcade Genres (in order):
      • Fighting games, Shmups, Light-gun, Puzzlers, Driving
    • acblunden2 wrote:

      BlinG wrote:

      I feel if you want it to just "work" without having any issues, the 5.0a+b rev boards are what you want
      I have both 5.0a and 5.0b boards. Have issues with them both and seem to be cable related. Don't have a 5.1 board, so no way I can validate if your mention of the 3.3v rail being the problem; will take your word for it.
      I will say I've never used an original cable though. Only new cables that are less than 8 inches, which may be why I've never had issues with the cable.
    • Seems odd that the existence of a 3.3v rail on the PSU would cause the 5.1v SCSI2SD not to work. CPS3 is a JAMMA board and doesn't harvest 3.3v at all. But yeah, I'll take your word for it.

      So bottom-line, provided the user formats the SD card correctly using the right image, with a compatible card, and sets the SCSI2SD board as recommended in the earlier posts on this thread, users should only encounter near-unsolvable issues with the different revisions in these scenarios:
      1. Version 5.0a (green board) & 5.0b (red board) - if there are issues with the SCSI cable
      2. Version 5.1 - if their cab has a 3.3v rail on their PSU
      Arcade Multi Systems:
      • Sega: ST-V, Naomi w/Net Dimm, Naomi w/CF Boot (DIY and OG versions), Taito: G Net, Taito F3, Taito Type X², Capcom CPS2, Capcom CPS3, Neo Geo MVS 4-Slot
      Favorite Arcade Genres (in order):
      • Fighting games, Shmups, Light-gun, Puzzlers, Driving

      The post was edited 1 time, last by acblunden2 ().

    • acblunden2 wrote:

      Seems odd that the existance of a 3.3v rail on the PSU would cause the 5.1v SCSI2SD not to work. CPS3 is a JAMMA board and doesn't harvest 3.3v at all. But yeah, I'll take your word for it.

      Still not as weird as what I learned today about a particular Sega PSU common in Astro/NAC that won't run Cave CV-1000 boards.

      The 3.3v issue could be related to the JVS to JAMMA converter since all 3 rails would be connected to that converter. Maybe it's not grounded properly or something
    • xodaraP wrote:

      Still not as weird as what I learned today about a particular Sega PSU common in Astro/NAC that won't run Cave CV-1000 boards.
      A thinly veiled brag. Well done sir, well done :D . The definition of "1st World Problems".

      All kidding aside, I feel yah on this.
      Arcade Multi Systems:
      • Sega: ST-V, Naomi w/Net Dimm, Naomi w/CF Boot (DIY and OG versions), Taito: G Net, Taito F3, Taito Type X², Capcom CPS2, Capcom CPS3, Neo Geo MVS 4-Slot
      Favorite Arcade Genres (in order):
      • Fighting games, Shmups, Light-gun, Puzzlers, Driving
    • acblunden2 wrote:

      xodaraP wrote:

      Still not as weird as what I learned today about a particular Sega PSU common in Astro/NAC that won't run Cave CV-1000 boards.
      A thinly veiled brag. Well done sir, well done :D . The definition of "1st World Problems".
      All kidding aside, I feel yah on this.

      Not my CV-1000 (one day maybe) - I do have a CPS3 and a cab with 3.3v in it though so I do have interest in why it happens

      @djsheep is replacing one of his Astro PSUs and part of the reason why is that it won't run Cave boards. I'd never heard of the issue before but he sent me the AO page that mentions it
    • nem wrote:

      xodaraP wrote:

      Still not as weird as what I learned today about a particular Sega PSU common in Astro/NAC that won't run Cave CV-1000 boards.
      Which PSU?

      I have a CV-1000 running fine on a recapped 400-5198. It's the OG PSU that came with the very first Astro Cities. Pretty sure it's the lowest specced of all.
      The 400-5198-Y definitely doesn't run CV-1000 games (plus a handful of other systems, even Pandora's Box 6 doesn't work, not that I care!).

      As you mentioned, the 400-5198 runs CV-1000 just fine as that's what I have in my two NAC's. It's a strange thing, I belive I read on ArcadeOtaku it has something to do with the weak 12v on the "Y" PSU.
      Multis: CPS-2, CPS-3, F3, ST-V, MVS, M72, G-Net
      PVMs: 2043MD, 20M2MDA, 20L2MD
      Supergun: Sentinel / XRGB-mini
      PCBs: VAPS Profile

    • my issues were not scsi cable related. I was only using the original ones from my cps3 sets... but the same setup would work on my other cabs that failed on my blast. and I even had everything mounted to a wood board, so it's not like stuff was shifting around. I don't know if it is the 3.3v line that messes it up, or some kind of noise on the 5v line at startup? because if I let the cab start up and then a split second later plugged in the scsi2sd all would be fine... it's only if it's plugged in at boot that it locks up during its own startup sequence.
    • KaPH33n wrote:

      my issues were not scsi cable related. I was only using the original ones from my cps3 sets... but the same setup would work on my other cabs that failed on my blast. and I even had everything mounted to a wood board, so it's not like stuff was shifting around. I don't know if it is the 3.3v line that messes it up, or some kind of noise on the 5v line at startup? because if I let the cab start up and then a split second later plugged in the scsi2sd all would be fine... it's only if it's plugged in at boot that it locks up during its own startup sequence.
      Blast City was designed to work for the NAOMI boards and are JVS-compatible (no JVS-ready). So if it is true that the SCSI2SD boards don't work with PSU's that have a 3.3v rail, then the SCSI2SD won't work on your cab.
      Arcade Multi Systems:
      • Sega: ST-V, Naomi w/Net Dimm, Naomi w/CF Boot (DIY and OG versions), Taito: G Net, Taito F3, Taito Type X², Capcom CPS2, Capcom CPS3, Neo Geo MVS 4-Slot
      Favorite Arcade Genres (in order):
      • Fighting games, Shmups, Light-gun, Puzzlers, Driving
    • New

      I just got a v5.1 and tried it on my CPS3 in the NNC, which I think has a 3.3 PSU.
      No issue so far... maybe I got lucky? Note that I am using a Jammafier.

      Systems: Sega STV + DS Multi | CPS2 + DS Multi | CPS3 + DS Multi | Taito F3 + DS Multi | MVS + DS Multi | Naomi 2 + Pi Netboot | Atomiswave | Taito G-Net + 2011 Bios
      Cabs: Tecmo Kyotaro | Tekken 5 NNC

      The post was edited 1 time, last by Takosuke ().