[Coco] ADOS 3 Rom Question

[Arthur Flexser]

As I recall, the FD-502 is also shorter than the 500 and 501, so doubt
there could be such a thing as a 501 inside a 502 case.  Does the
FD-502 actually identify itself as such on the case?

Art

On Thu, Mar 12, 2009 at 8:52 PM, Darren A <mechacoco at gmail.com> wrote:
> Yeah... that doesn't sound like an FD-502.  In addition to having a
> 28-pin ROM socket, the 502 (as supplied by Tandy) has the controller
> chip soldered directly to the board.  Perhaps he has a 501 inside a
> 502 case.  The edge connector contacts are gold on a 501, but not on a
> 502.
>
> Darren
>
> -----
>
> On 3/12/09, Arthur Flexser  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 <dml_68 at yahoo.com> 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)
>
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