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Horizon RAM disk help


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#1 Vorticon OFFLINE  

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Posted Mon Feb 26, 2018 2:37 PM

Hi.

I found this HRD board under a stack of other TI stuff today and had totally forgotten about it. I think I got it a one of the Chicago Faires several years ago. It does not seem to work and I'd like to fix it if possible. The battery is definitely dead. Pin 8 of the chip immediately below and to the left of the Zippie sticker is bent upwards and there was something soldered to it in the past, but I can't seem to find a loose wire anywhere.

 

I can't tell which version of the HRD it is. Clearly some modifications have been made and there is a mysterious "Zippie" sticker on it. Can you guys help me identify this board properly?

 

Attached File  20180226_115211.jpg   1.83MB   1 downloads

Attached File  20180226_115229.jpg   1.92MB   1 downloads



#2 Sinphaltimus OFFLINE  

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Posted Mon Feb 26, 2018 2:45 PM

Vorticon - Looking at the back of the board.See the WHITE TAPE on the wire near the top left. Count from that solder point straight down, at some point you'll shift slightly right to continue counting. the 23rd solder point looks like it may have rotted away across that trace.Possibly breaking it? I doubt that's your issue but something to note with a fresh pair of eyes on just the photos.


Edited by Sinphaltimus, Mon Feb 26, 2018 2:45 PM.


#3 Vorticon OFFLINE  

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Posted Mon Feb 26, 2018 2:56 PM

Vorticon - Looking at the back of the board.See the WHITE TAPE on the wire near the top left. Count from that solder point straight down, at some point you'll shift slightly right to continue counting. the 23rd solder point looks like it may have rotted away across that trace.Possibly breaking it? I doubt that's your issue but something to note with a fresh pair of eyes on just the photos.

 

Yup I see it. Thanks for the tip :) I'll definitely have to fix that.



#4 atrax27407 ONLINE  

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Posted Mon Feb 26, 2018 3:05 PM

Previous owner was probably Dave Zipple hence the sticker.



#5 Schmitzi OFFLINE  

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Posted Mon Feb 26, 2018 3:08 PM

Is this a HRD-2000 ?

And what is the switch for ? Memory "reset" (= power off)  or so ?



#6 Vorticon OFFLINE  

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Posted Mon Feb 26, 2018 4:49 PM

Previous owner was probably Dave Zipple hence the sticker.

 

Ah! So it's zipple and not zippie!  :lol: One mystery squared away.



#7 atrax27407 ONLINE  

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Posted Mon Feb 26, 2018 5:15 PM

The switch is probably the mod to "hide" the card. 



#8 Vorticon OFFLINE  

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Posted Mon Feb 26, 2018 5:37 PM

So is it an HRD 2000?



#9 marc.hull OFFLINE  

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Posted Mon Feb 26, 2018 5:59 PM

So is it an HRD 2000?


Yes it is most definately a HRD 2000. And looks to have both change notice mods done to it.

#10 Vorticon OFFLINE  

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Posted Mon Feb 26, 2018 6:26 PM

Yes it is most definately a HRD 2000. And looks to have both change notice mods done to it.

 

Hey Marc! Good to hear from you.

What are the change notice mods?



#11 marc.hull OFFLINE  

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Posted Mon Feb 26, 2018 6:55 PM

1) Switch to turn the card off so it won't hang your console if your ROS gets botched and 2) the power on/reset mod to prevent your ROS from getting botched.

Have you tried the CFG program on it ?

#12 arcadeshopper OFFLINE  

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Posted Tue Feb 27, 2018 1:46 AM

that is one hell of a toggle switch



#13 Vorticon OFFLINE  

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Posted Tue Feb 27, 2018 6:58 AM

1) Switch to turn the card off so it won't hang your console if your ROS gets botched and 2) the power on/reset mod to prevent your ROS from getting botched.

Have you tried the CFG program on it ?

 

I'll play with it today as I just got off service. I never got to try the CFG program because the board always hung my system as I vaguely recall. Also need to fix that bad solder joint Lenny pointed to and replace the battery. 

I'll report back later today.



#14 Vorticon OFFLINE  

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Posted Tue Feb 27, 2018 4:19 PM

Success! I replaced the 3.6V alkaline battery and fixed the bad solder joint and now the board was being recognized by the CFG program.

I was able to create 2 720 sector disks and read/write to them without issues. Total size of HRD is 384K.

Now I already have a functional 1meg HRD courtesy of Marc, so I'm going to put the HRD 2000 on Ebay as it is too small for my needs.

Thanks for the help guys.

 

Attached File  20180227_152435.jpg   1.36MB   1 downloads

 

 



#15 marc.hull OFFLINE  

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Posted Tue Feb 27, 2018 5:55 PM

Good. Another cheese grater lives. What do you want for the 2000?

#16 Opry99er OFFLINE  

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Posted Tue Feb 27, 2018 6:07 PM

Hey Walid, if Marc passes, I would be potentially interested. Can these be upgraded to a meg, fellas?

Edited by Opry99er, Tue Feb 27, 2018 6:09 PM.


#17 marc.hull OFFLINE  

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Posted Tue Feb 27, 2018 6:26 PM

The card should do just right at 1mb unformatted. Of course that's stacking 3 high to 32 chips (I believe that's correct.) Good thing is that it doesn't have to be done all at once. It can be remodeled as you go.

#18 marc.hull OFFLINE  

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Posted Tue Feb 27, 2018 6:28 PM

And, didn't think and I put you on the spot Walid. Feel free to tell me to FO. Sorry.

#19 Vorticon OFFLINE  

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Posted Tue Feb 27, 2018 7:26 PM

Actually I put the card on Ebay already with a starting price of $99 and someone already has placed a bid on it. Frankly I have no ideas what these are worth... eBay Auction -- Item Number: itm/152925060248?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649



#20 marc.hull OFFLINE  

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Posted Tue Feb 27, 2018 8:05 PM

Actually I put the card on Ebay already with a starting price of $99 and someone already has placed a bid on it. Frankly I have no ideas what these are worth... eBay Auction -- Item Number: itm/152925060248?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649


It's worth exactly what it sells for.

#21 OLD CS1 OFFLINE  

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Posted Thu Mar 1, 2018 12:39 AM

Yummy...



#22 Sinphaltimus OFFLINE  

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Posted Thu Mar 1, 2018 9:40 AM

WOW $151 with 5 days remaining. Congrats! Hope you get more....



#23 BeeryMiller OFFLINE  

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Posted Thu Mar 1, 2018 12:49 PM

I assume there is no issue using this card on a Geneve.  Would it be configured as an 8 bit or 16 bit card?



#24 Vorticon OFFLINE  

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Posted Thu Mar 1, 2018 2:41 PM

WOW $151 with 5 days remaining. Congrats! Hope you get more....

 

Mostly I hope it goes to someone who will use it and not hoard it...



#25 mizapf OFFLINE  

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Posted Thu Mar 1, 2018 3:21 PM

I assume there is no issue using this card on a Geneve.  Would it be configured as an 8 bit or 16 bit card?

 

There is no 16 bit data bus on the Geneve. Anyway, I thought only the SNUG HRD16 (https://www.s-n-u-g....16/index_en.php) allows for 16-bit access.






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