ScopePar 1.1

ScopePar 1.1 is constructed as a freeware which enables to turn a PC into a multi-channel oscilloscope module utilizing the parallel port, the user interface to which is SeriCon on other PC. If you have an old PC, boot it by dos to run ScopePar and control it by SeriCon on your GUI PC through serial port. The free trial version of SeriCon is enough in usual cases. Important features are: a 5 channel square wave oscilloscope. Sampling rates upto around several 100kHz. Trigger modes.

Major Features:

1. ScopePar is now a 5 channel square wave oscilloscope. Square waves mean that it just reads the high or low levels of the port pins (Later versions may be able to show curves, requiring ADC attached to the port). SeriCon shows only 2 channels, unless you have the full license.
2. Sampling rates around several 100kHz can be reached.
3. The measurement can be triggered by the first channel. You can select the level change (low-to-high or high-to-low).
4. The system to measure also can be triggered by the output data pins just before a measurement period starts.
5. The measurement can be automated by specifying the period of sending the command from SeriCon (with the full license).
   

Enhancements:

• The LPT1 output port can be used to trigger the system to measure: Just before the measurement starts, the port byte gets inverted (0xaa). The byte comes back to 0x55 right after the measurement, which is the initial value set right after the program starts.
• "x" command is added, which terminates the program.
• The program gets robust: ignores any command else than "x" and "i", before it receives and processes the "i" command, so that wrong commands cannot spoil the states of the program or SeriCon. 

Requirements:

• CPU: Intel 80386 or higher
• OS: DOS.