Donatas E wrote
> because in Keil's monitor deskription is said,
> that monitor must reside in external ROM
This is simply not true and one of the error in their docs.

Markus wrote:
> i am not sure but i think if code is executed
> frmo internal ROM no MOVC commands can
> be executed for external ROM
This will work. I think the oposite direction MOVC
to internal ROM executed from external ROM is
not allowed when the controller is protected.

I am using here a Board with MON51 in a 89C52
and 32k RAM between 0x4000 and 0xBFFF
The same addressspace can also populated
with a 29c040 for banking applications.

This board was developed for debugging USB
designs with TI's TUSB 3200. Which memory
device is accessed at 0x4000 and von Neumann
layout can be defined by programming a HC574
latch with one of 4 modes.

So far I have no problems to step my applications
using MON51. Of cource app + XMEM vars have
to be less than 32k -256 bytes, and the app must
be linked to start at 0x4000.


Thomas