My LPC935 still refuses to enter ISP wth the code below adapted from the FlashMagic link given in this thread. Incidentally I am using the MCB900 kit and trying with the jumper in RUN mode. This is what happens : I put the jumper in RUN mode - Press the ISP switch - I get the "Entered ISP mode" message - I releease the push button - the chip is reset by the WD timeout - BUT instead of entering ISP it proceeds with code execution !!
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....
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watchdog_init(); // Initialize WD and be ready
watchdog_stop(); // Stop the WD unless user presses ISP push button

if ( ISP_PB == 0) // User wants to program the flash
{
#pragma asm
push IEN0
mov R0, #0FFH
mov @R0, #96H
mov A, #02
mov R5, #01
mov R7, #03
lcall 0FF03H
pop IEN0 // Chip should now enter ISP for the next power on reset
#pragma endasm

display ( "ENTERED ISP MODE" );
msDelay(1000); // 1 sec delay
watchdog_start(); // Start the WD and allow it to reset the chip.
}
......
......
===========================
I know I am missing something. But which ?

Raghu