[Coco] ADOS 3 Rom Question

[Tim Fadden]

 From what I remember, the latest 501 was in a short case. Also the 
502's were gold except for the very last model where the gold was dropped.
There is a website that shows pictures of all of them, but I don't 
remember exactly where!  If I find it I will post it.

Tim
Arthur Flexser wrote:
> 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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>>
>>     
>
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