Hi,
You should have shown the connections you made for 244. Just note the major difference of I/O pin reversals in 244 compared to 541, Eg., pins 3 and 17, have you made corrections in your circuit to take care of such differences?
Other points to be noted are:
1. Put two caps 20 to 30 pfs, on either ends of the crystal.
2. May be you can reduce the resistor value of 1K on the clock line to 100 omhs and try, some times these values and cable length are also critical for such programmers.
3.Check if the software is compatible with the OS you are running under?
- Does the parallel port output bits change states when you run the software? Is the power LED glowing?, It may still glow since on booting, this may be the initial state. So, check the state change of any one of the other pins used in the program to see if software is getting control.
- You may have to set the parallel port to Standard Parallel Port in the CMOS set up for the software to get control.
- When you run the PC software, are you getting the programming screen ?
Regards,
Laktronics