This program write alternate two low frequency or three high frequency tones to the tape recorder.
Record this for a couple of minutes.
When reading this tape the PLL should convert this to a symmetric block pulse.
This program shows on the first two digits on the KIM-1 LED display the number of ‘1’s read, on the second two digits the number of ‘0’s read.
When all is well this should 80/80 but anything between 60/A0 and A0/60 is fine.
See also:
My KIM-1 expansions in Radio Bulletin
KIM-1 expansions in Radio Bulletin"
My KIM-1 system was based upon what we had published in Radio Bulletin. These artic...
Teach KIM to Sing
A program to let the KIM-1 play music. Store notes and its pitch in memory and listen to it.
Published in the Byte Bo...
Radio Bulletin articles in English
A collection of articles about the KIM-1, original in Dutch, here translated to English and with source and binary of th...
Replica 1 TE PAL version
User ExPLIT on the German forum Verein zum Erhalt klassischer Computer e.V.
has build an Apple 1 Replica 1 TE from th...