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:
PicoSYM, a SYM-1 emulator on a Raspberry Pico
Emulation of a Synertek Sym-1 on a Raspberry Pi Pico 1 (W).
By andysa on the emulation forum on 6502.org
Here is t...
Amazing it works!
After publishing the photos of the transistors used in the KIM-1 a discussion started on forum64.de in the 'Instandsetzu...
Transistors in the KIM-1
Even a microprocessor based computer as the KIM-1 required some simple transistors.
To drive the LEDs some extra curren...