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:
KIM-1 programs by Nils
Nils a.k.a. netzherpes typed in a number of KIM-1 programs to run on his PAL-1, the KIM-1 compatible clone. Not only do...
Nils a.k.a. netzherpes typed in a number of KIM-1 programs to run on his PAL-1, the KIM-1 compatible clone. Not only do...
Galactic Expansion Board
When I got a SYM-1 again, I needed to add ROMs, RAM and it would be nice to have the 1541 DOS finally operational (I had...
When I got a SYM-1 again, I needed to add ROMs, RAM and it would be nice to have the 1541 DOS finally operational (I had...
C, Basic, RAE on the SYM-1
Wayne Parham of Parhamdata has an interesting page on his VIM-1 and SYM-1 systems. He has written some interesting pa...
Wayne Parham of Parhamdata has an interesting page on his VIM-1 and SYM-1 systems. He has written some interesting pa...
SYM-1 Memory Allocation
The SYM-1 had a comprehensive expansion strategy with both I/O (3 6522 PIAs and a 6532 RIOT) and memory. The board was s...
The SYM-1 had a comprehensive expansion strategy with both I/O (3 6522 PIAs and a 6532 RIOT) and memory. The board was s...