Messages

Sorry I haven't been around for a whlie.
The Bootloader code I was refferencing to is at:
http://www.nxp.com/documents/other/an10337.zip
and
http://www.nxp.com/documents/other/Adding_ISP_in_source_code.zip

ISP FN 9 read user memory will use IAP FN 7

"      mov   DP0H, R4   ; Data Pointer High Byte
      mov   DP0L, R5   ; Data Pointer Low Byte
      clr   A
      movc   A, @A+DPTR
      mov   R7, A
      ret
"
And IAP FN 7 will use movc, so Bit 1 will work

no it isn't.
Use the security bits, thats what they are for.

Strange!
Maybe you need to get an updated Doc from NXP.

The Bootlodercode supplyied by NXP does contain a
Function 09 -Read User

And if I open a Terminal and type in:
:0500000900000fff00e4
I will get a perfect Memory Dump.
Tested with a brand new 89LPC921.

So at least the current 921 do support memory read.

Regards
Ralf