Dallas Semi DS89C4x 8051 chips and Keil C51

[cthulhiac]

Hi all,

I have a generic 8051 development board with the Dallas Semi DS89C430 8051 chip. It comes preloaded with the Dallas Semi loader 2.1. I plan on replacing it with the Keil MON390 which allows for direct debugging from the Keil IDE.

My question is:

If I replace the Dallas Semi monitor with the Keil MON390, can I go back if I change my mind?

I am pretty sure I can use the DS monitor to overwrite itself with MON390. Will MON390 let me do the same and replace it back with the DS monitor?

Thanks!

[pickit2]

do you only have one chip, to work on a project?
if I remeber right the data sheet for the chip as full details of the programer. so you can build one from listed parts.

[cthulhiac]

Thank you for the suggestion. I hadn't thought (doh!) of looking for any relevant application notes so when I did, I found this:

https://www.analog.com/media/en/technical-documentation/app-notes/using-the-keil-microvision-debugger-with-the-ds89c4x0.pdf

Cheers!