MissionDestroyAliens Posted July 15, 2015 Share Posted July 15, 2015 (edited) Hello: Can someone help me identify this Atari card. I think it is an ACSI/SCSI adapter but I cannot find any pics or info identifying it. It looks similar to the SH204 but it is different. There are 50 pins on one side that fit an internal scsi ribbon cable and an ACSI on the other side. 8 pins on each side are wired through each resistor pack by the scsi side. I do not see any other wiring for parity or terminal power. Any info on this card and how to use it would be greatly appreciated. Willy I did try connecting this to an IBM WDS3200 HD and also tried adding a parity generator using a breadboard but could not get the Atari to recognize a hard drive. Edited July 15, 2015 by MissionDestroyAliens Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted July 15, 2015 Share Posted July 15, 2015 Should provide sharper photos, to be able to see IC numbers. There is ACSi-SCSI adapter schematic available online, with discrete 74xxx chips, so this may be exactly that. Quote Link to comment Share on other sites More sharing options...
Dal_1978 Posted July 15, 2015 Share Posted July 15, 2015 (edited) Better pictures needed I think. Do you know where this came from? It's an Atari board so that narrows it down to SH204/205 or Megafile Edited July 15, 2015 by Dal_1978 Quote Link to comment Share on other sites More sharing options...
MissionDestroyAliens Posted July 15, 2015 Author Share Posted July 15, 2015 Thanks for your help. Here are some better pictures. I do not know anything about the board. I found it in a box of misc. Atari stuff I purchased from someone a while ago. I would not know how to reach this person. The board was in a tweety board box and I never knew it was in there until recently. This board does resemble the SH204 but the acsi and scsi connectors were along the narrower section of the PCB as opposed to the wider section like this one. Thanks Willy Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted July 16, 2015 Share Posted July 16, 2015 it is similar to Mega STE internal ACSI-SCSI adapter, but with only 1 PAL instead 2 . Surely not SH205 or Megafile adapter, because they were not with with SCSI driver, but MFM/RLL drives. Best what you can do is to try it with some SCSI drive and some freeware driver solution - like AHDI or ICD or mine ACSI driver. But that means to find suitable drive where can disable parity. For instance some IBM drive of 2 GB . Will need some power supply, cables too. Quote Link to comment Share on other sites More sharing options...
MissionDestroyAliens Posted July 16, 2015 Author Share Posted July 16, 2015 Thanks for the info: I will look for scsi drive with parity jumper. I know that I need to supply the HD with power from a molex but do I need to supply additional power to the 4-pin mini-molex on the adapter. The notched piece is no longer on the mini-molex but I can see two traces coming from it..one in the middle for ground and one on the end that I assume will be the 5 volt rail. Thanks Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted July 18, 2015 Share Posted July 18, 2015 Card needs power, of course. And it can not go via ACSI port. To be sure, check is that trace leads to proper pins of chips. +5V usually goes on top left pin (14, 16 or 20, depending on pin count) . Quote Link to comment Share on other sites More sharing options...
MissionDestroyAliens Posted July 18, 2015 Author Share Posted July 18, 2015 (edited) Thanks for the info. I have one more question just to make sure I have the orientation of the scsi pins correct. If I am looking at my board with the chips on the top and the scsi pins facing me, the entire top row of 25 pins is connected to the ground from the mini-molex. Am I right in asuming that the top left pin is 1 and the bottom left pin is 2? The bottom left 8 pins are connected to the first resistor pack in front of the PAL chip. The 5 volt rail goes to pin 8 on the resistor pack which is where pin 8 (from the bottom left) on the scsi also goes, which would be pin 16 as you stated. Does that sound right? Thanks Edited July 18, 2015 by MissionDestroyAliens Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted July 20, 2015 Share Posted July 20, 2015 I think that you should check it yourself. WEB is full with pin layouts of diverse connectors Quote Link to comment Share on other sites More sharing options...
MissionDestroyAliens Posted July 20, 2015 Author Share Posted July 20, 2015 And the title of this post is "Can you identify this card" If you can't then don't chime in (: Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted July 20, 2015 Share Posted July 20, 2015 No sir. You expect from other people to do what you can google in 15 secs: scsi connector pinout - will get plenty of pictures and similar After such approach don't expect some enthusiasm in further help .... Card is identified as much is possible after pictures. Quote Link to comment Share on other sites More sharing options...
joska Posted August 5, 2015 Share Posted August 5, 2015 Interesting piece of hardware. It does look like an ACSI->SCSI card, but I did not know that Atari made such a thing as early as 1985. Also, it does not have an ACSI through-port which IIRQ all Atari harddrives had. Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted August 5, 2015 Share Posted August 5, 2015 I don't think that it's made by Atari. There is only "..identify this Atari card." . What means card for Atari IMHO Quote Link to comment Share on other sites More sharing options...
joska Posted August 5, 2015 Share Posted August 5, 2015 There is an Atari logo on the PCB. Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted August 5, 2015 Share Posted August 5, 2015 That's not 100% proof. Maybe it is just some experimental board, what was not sold. Testing may fail because board may be broken. Anyway, this thread is dead, as OP has some bad ideas about what forum help means. Get UltraSatan dude Quote Link to comment Share on other sites More sharing options...
joska Posted August 5, 2015 Share Posted August 5, 2015 That's not 100% proof. Maybe it is just some experimental board, what was not sold. Exactly, which is what makes it interesting Quote Link to comment Share on other sites More sharing options...
Fletch Posted August 5, 2015 Share Posted August 5, 2015 Exactly, which is what makes it interesting I don't have much to offer here, but I for one find it an interesting piece of history. Even if that is all it is. Thanks for sharing it. Quote Link to comment Share on other sites More sharing options...
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