hi, i'm new to microcontroller program . i have 89c51 controller max 232 ic, but to program i need athor programmer, is any possiblety to built my own programmer. please help me,
There seems to have once been a description of this cable, i.e. how it was connected. The related link is just the pinout of the ISP side - not the corresponding parallel port pins.
There are links to be found on the net, but the document seems to have been pulled from the Atmel site.
I did contact Atmel support for the nordic countries last year about it, since I then was in very big need of a cable in a hurry. They could not produce the document or a supplier in Sweden. But their suggested workaround was to invert the reset signal and use a AVR SDK500 kit.
If I need to program more AT89S chips, I should probably get a AT89ISP cable, since it is a bit more compact than the big SDK500 board. On the other hand, the machine I'm writing this on may probably be the last machine I'll have with a parallel port.