What are the really unusual or weird computers?

[Curt @ Atari Museum]

I only saw the cassette ports (next to the keyboard ports) on the very 
early IBM PC's which were generally the ones that were shipping I think 
with only 64K installed.    Then the later shipped IBM PC's with fully 
installed memory no longer had the cassette ports (some of the cases had 
a plastic cover over the port, then the cases completed had the cassette 
port hole omitted completely and that was it on those...


Curt



Sridhar Ayengar wrote:
> Tony Duell wrote:
>>> On 27 Jun 2007 at 20:17, Jim Leonard wrote:
>>>
>>>> Could you elaborate?  I've never found a single program that will 
>>>> work on, say, my 5150 but not my 5155 or 5160...
>>> Including ROM BASIC that writes and reads cassette tapes?
>>
>> ROM BASIC is present on the PC, XT/Portanble and AT at least. I have 
>> no idea if it was fitted to any PS/2 machines.
>
> Most PS/2 machines have it.  Only the absolute latest ones, like the 
> 85 and 95 don't.  It was even included in some post-PS/2 machines.  I 
> think it only disappeared completely when IBM stopped using BIOS that 
> were written specifically for each machine and moved to something 
> "standardized".
>
> They don't have the cassette port, though, of course.
>
> Peace...  Sridhar
>