Schematic and layout for an updated JDM2 PIC Programmer. Includes clock and data filter, Vpp voltage divider for modern PIC microcontrollers (eg USB PIC 18F2455/4455).
http://www.instructables.com/ex/i/6D80A0F6DA311028931A001143E7E506/
for PIC16F84,12C50x and EEPROM 24Cxx
http://mpu51.tripod.com/jdm84/jdm2001.htm
And Development System
http://www.angelfire.com/ok3/masterbyte/
http://www.web-ee.com/Schematics/PIC_Programmer/PIC_PROG.htm
a serial device programmer software with a user friendly GUI framework available for Windows95, 98, 2000 & NT and Intel Linux.
http://www.lancos.com/prog.html
http://www.qsl.net/vu2upx/Projects/topic.htm
http://chaokhun.kmitl.ac.th/~kswichit/f84/f84.htm
http://chaokhun.kmitl.ac.th/~kswichit/LcdTerm_web/LcdTerm.html