[Coco] ADOS 3 Rom Question

[Derek]

My mistake its an FD-501 controller just like it says on the label, in big lettering, in english..FD-501.. I blame 20 years of marriage for a mushy mind

Arthur Flexser <flexser at fiu.edu> wrote: Are you sure that's an FD-502?  According to my notes, the FD-502 is
the one controller Tandy made that has a 28-pin ROM socket, which
should therefore be directly compatible with your 28-pin ADOS-3 EPROM
(though it requires a small modification to enable the upper 8K of ROM
space to accommodate Extended ADOS-3.)  I suspect you actually have an
FD-500 or FD-501.

Art

On Thu, Mar 12, 2009 at 4:44 PM, Derek  wrote:
> 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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