Author Topic: Tandy CoCO Amdisk !  (Read 5860 times)

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Offline 00WReX

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Tandy CoCO Amdisk !
« on: 08:50, 19 January 14 »
As a fan of the Tandy Color Computer series (CoCo 1,2,&3), I was looking through and early
edition of the HOT CoCo magazine (July 1983) and found an interesting advertisement...

It was for a dual 3" drive called an Amdisk of all things...


 [ You are not allowed to view attachments ]

(click to enlarge)

I have never seen or heard of one and would expect they would go for a small fortune if one
came up today.

Cheers,
Shane
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Offline 00WReX

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Re: Tandy CoCO Amdisk !
« Reply #1 on: 09:29, 19 January 14 »
Looks like this company also made them available for a few computers of the time (US based).

The Amdek Amdisk-III

Amdek Amdisk I | Applefritter

http://www.atarimagazines.com/compute/issue46/040_1_REVIEWS_AMDC_3-Inch_Disk_Drives_For_Atari.php

Cheers,
Shane
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Offline Gryzor

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Re: Tandy CoCO Amdisk !
« Reply #2 on: 12:33, 19 January 14 »
How interesting... Of course let's keep in mind that 3" drives/disks were not Amstrad's inventions, so they're bound to have come up for various systems...

Offline fgbrain

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Re: Tandy CoCO Amdisk !
« Reply #3 on: 23:04, 19 January 14 »
Did you notice "624 kb per disk" is twice the size of the AMSDOS format ?
This must be an 80 track drive..?!
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Offline Bryce

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Re: Tandy CoCO Amdisk !
« Reply #4 on: 23:12, 19 January 14 »
I mentioned these drives a while back. There's some info and links here: Wanted: CF2 disk drive ASAP

Bryce.

Offline 00WReX

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Re: Tandy CoCO Amdisk !
« Reply #5 on: 04:40, 20 January 14 »
I mentioned these drives a while back. There's some info and links here: Wanted: CF2 disk drive ASAP

Bryce.


Bryce, That's almost identical info...I don't remember seeing your post (although it looks like I've copied it  :D ).
The Amdisk 3 for the CoCo actually looks neat with the dual drive setup.


Did you notice "624 kb per disk" is twice the size of the AMSDOS format ?
This must be an 80 track drive..?!


That size is for both disk's combined I'm assuming.

so 624kb divided by 4 disk sides = 156kb.

This is very close to what we get on the CPC with an IBM format.

IBM: 160k single-sided. 40 tracks of eight 512-byte sectors each. Sectors numbered &01 to &08. Provided for compatibility with CP/M-86 (and DR-DOS 1.0). Used by very few CPC purchasers, but Locomotive Software stated that this was invaluable for cross-assembly. The useable capacity is 158k.


Disc format - CPCWiki

Cheers,
Shane
The CPC in Australia...
Awa - CPCWiki

Offline Bryce

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Re: Tandy CoCO Amdisk !
« Reply #6 on: 10:16, 20 January 14 »
Yes, they certainly weren't 624K per disk. It was the usual advertisers twisting the facts to make it look as good as possible. I've only ever once seen one of these (back in the 90's) and it was connected to an Atari 800XL as far as I can remember.

Bryce.

Offline Gryzor

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Re: Tandy CoCO Amdisk !
« Reply #7 on: 19:42, 20 January 14 »
Well, it wasn't really an advertising twist; it says "624K system" pointing at the entire unit, akeen to the "xxxKB/MB online storage" they also used.

Offline fgbrain

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Re: Tandy CoCO Amdisk !
« Reply #8 on: 23:18, 20 January 14 »

No, it has double density 80track mode!! Read the review..
Quote
If you connect an 80-track, double-density, double-sided drive to the system using DOS/XL, you can get 736K.
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Offline TFM

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Re: Tandy CoCO Amdisk !
« Reply #9 on: 00:03, 21 January 14 »
Yes, as the Joyce hat 0.7 MB format on its 3" drives too.

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Offline MacDeath

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Re: Tandy CoCO Amdisk !
« Reply #10 on: 00:55, 21 January 14 »
Quote
HOT CoCo magazine
then have a hot Coco post :


I've read those "Coco" had quite a nice success in USA, is that true ? got some "modern" games on those ?

Quote
624 kb
bits or bytes ? that's why we used the octet in France.
« Last Edit: 00:57, 21 January 14 by MacDeath »

Offline Bryce

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Re: Tandy CoCO Amdisk !
« Reply #11 on: 11:08, 21 January 14 »
Thanks MacDeath, for making a perfectly innocent Retro forum NSFW! :D

Bryce.

Offline MacDeath

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Re: Tandy CoCO Amdisk !
« Reply #12 on: 22:23, 21 January 14 »
I don't care, I can't consult this forum at work.


Promotion !!!

 ;D


Promotions | Know Your Meme


Offline Gryzor

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Re: Tandy CoCO Amdisk !
« Reply #13 on: 19:06, 07 February 14 »
Time I put an age restriction in the registration process... :D