1st stage loader for IMSAI - need ascii to binary conversion

[Marden P. Marshall]

On Feb 25, 2008, at 9:53 PM, Richard A. Cini wrote:

>
> On 2/25/08 9:40 PM, "David Griffith" <dgriffi at cs.csubak.edu> wrote:
>
>> This paper tape fiddling made me wonder if anyone ever made a  
>> cassette
>> tape interface that emitted RS232 signals and looked to the  
>> computer like
>> a paper tape reader/writer.
>>
>
> Isn't that what the 88-ACR board did? I'd have to pull the book, but  
> IIRC,
> it was an audio processing board connected to an SIO board. That's  
> why the
> MITS Absolute Tape Format worked -- the format of the paper tape and
> cassette were the same but the media was different.
>
>
> Rich
>
> --
> Rich Cini
> Collector of Classic Computers
> Build Master and lead engineer, Altair32 Emulator
> http://www.altair32.com
> http://www.classiccmp.org/cini
>
>
>

Yes that is basically what the Altair 88-ACR card was.  There were two  
parts to it, the main board that was a single channel serial card,  
minus the RS232 line driver, and a daughter card which was basically a  
FSK modem.

-Mardy