This program library contains an updated PSA toolkit as described in the QEX, November 1994 issue An Adaptive HF DSP Modem for 100 and 200 Baud SPASM21.EXE ----- Public domain 21xx assembler (updated CLOAD.EXE ----- Bootstrap formatter PSA1.OBJ ----- Object modules for writing your own "C PSA2.OBJ language applications (Large model only PSA.H ----- Header file required to compile "C" applications