Jump to content
IGNORED

horizon ram disk question


Willsy

Recommended Posts

Hmmm... Well, my SAMS card already had 32k on it, and so does the RAM disk (i think). I bought the RAM disk from Bud Mills at the Chicago Faire. It's heavily expanded with stacks of chips piggy-backing each other. Any idea which IC is the 32k? Need a photo?

 

Mark

Link to comment
Share on other sites

Hmmm... Well, my SAMS card already had 32k on it, and so does the RAM disk (i think). I bought the RAM disk from Bud Mills at the Chicago Faire. It's heavily expanded with stacks of chips piggy-backing each other. Any idea which IC is the 32k? Need a photo?

 

Mark

 

If you plug in the RAM disk without any other expansion do you see 32K ? Please post a photo...

Link to comment
Share on other sites

Okay, an update.

 

With the SAMS card removed and the Horizon card inserted (duh!) my system does a very good impression of a house brick. Ascetically more pleasing than a house brick, and certainly heavier, but a brick, all the same.

 

If I insert the Horizon card and the SAMS together then all is well. Nothing goes bang, and there is no fire. A bit like a house brick.

 

It's tempting to assume therefore that the Horizon doesn't contain the 32K. However, am I jumping the gun? There are no batteries installed in the RAM disk and no ROS loaded. Not sure how to do that yet. That's the next step!

 

Here's a pic of the board. The board is dated 1986. As you can see, it's very heavily hacked.

 

Of the DIP switches, only switch #0 is in the on position. All the rest are off. What does that mean? Anyone?

 

Blimmin' neat board though, eh?

 

Mark

 

post-24932-0-22656800-1327271398_thumb.jpg

post-24932-0-65091100-1327271432_thumb.jpg

Link to comment
Share on other sites

And while I'm at it, can anyone supply a ROS (with an appropriate installer program, which I assume is an ED/AS #5)?

 

I don't have any ROS disks. Bob sent me something but I couldn't get it to do anything.

 

Thanks

 

Mark

 

The pictured Horizon Ramdisk is the original board upgraded to 256k, the 32k ram modification is not present.

Looks like the dipswitch is set for CRU >1000 - switch 1, not the best choice. (try >1400, switch 5 or >1500, switch 6 if available).

 

 

The current Horizon ROS (CFG is the loader) is here:

 

ftp://ftp.whtech.com/emulators/pc99/utils/ros814f.dsk

 

The manual for the ROS is here:

 

ftp://ftp.whtech.com/datasheets%20and%20manuals/Hardware/Horizon%20-%20Bud%20Mills%20Services/ROS8-14%20and%20rambo%20manual.pdf

 

 

... aren't these cards a dime a dozen?

 

 

Gazoo

Link to comment
Share on other sites

Mark,

I have a few of this same model that I picked up from Bud. One of the two is "Eunice #2" and probably came from Eunice Spooner's system. The one's I received were untested and in unknown state of operation, per Bud. The CRUs were all in the first position so it seems likely Bud tested them once upon a time. That little switch makes the card 'visible' when "up" and 'invisible' when "down". Looks like the great Gazoo got you hooked up with the good stuff needed to load and operate the card.

Link to comment
Share on other sites

Thanks! I see my board has a sticker on it that says Eunice #3 - so there you go! I hope it works :-o - Bud certainly said that it did! I didn't notice that little switch until you mentioned it (just checked the photo I took earlier). Hmmm... Well, I have a Fred Kaal HDX system in my PEB so I could probably load the ROS directly from my PCs hard-disk... It's getting a bit late though!

 

Mark

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...