[Coco] ADOS 3 Rom Question

[Bob Devries]

Derek,

The chip that says WDC'83 is NOT a ROM. That is the controller chip for the 
disk drives.

The 24 pin chip is the ROM. You'll need a small daughter board to make the 
28 pin ROM work in that controller.

HTH.

--
Regards, Bob Devries, Dalby, Queensland, Australia

Isaiah 50:4 The sovereign Lord has given me
the capacity to be his spokesman,
so that I know how to help the weary.

website: http://www.home.gil.com.au/~bdevasl
my blog: http://bdevries.invigorated.org/

----- Original Message ----- 
From: "Derek" <dml_68 at yahoo.com>
To: "CoCo List" <coco at maltedmedia.com>
Sent: Friday, March 13, 2009 6:44 AM
Subject: [Coco] ADOS 3 Rom Question


>I just got a 28 pin ADOS 3 ROM chip and would like some help on installing 
>into an FD-502 Controller if possible. The Controller I have as 2 ROM 
>Sockets the 28 PIN ROM installed says WDC'83 with a chip number WD1773-ph. 
>The 24 Pin ROM is a Tandy Chip number SCM92128P. When I replaced the 28 PIN 
>ROM with the Ados chip I bought it comes up with the standard Disk Extended 
>Basic screen. (I put back the original ROM chip and the controller works 
>fine so I did not destroy anything)
>
> My questions are
> 1: Is this chip compatible with this controller?
> 2: If yes how do I engage ADOS?
> 3: If no what controlls will work with it?
>
> I do have an old FD-500 controller that has the same configuration (24 Pin 
> ROM has Disk Extdnded Basic and 28 Pin ROM is WDC'83 Chip) But I have not 
> tried on this controller as I wanted to get some help 1st.
>
> Thank you
>
>
>
>
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