Jan, > The address is $1d. When I look to the documentation te bits 0 and 1 > are R/W and the other bits are only Read (With a initial value of 0) > When I do the command $1d c@ . I get a value of 0001000. How is that > possible? Or do I something wrong?
The answer to this lies in the memory map of the AVR. If you look at page 72 in the datasheet you will see the address for EIMSK given as 0x1D (0x3D) Yes, two addresses. To see the contents of EIMSK in AmForth using c@ you need $3d c@ For the why see page 19 of the datasheet combined with a Google of "avr memory map offset $20" The file amforth-root/avr8/devices/atmega328p/atmega328p.frt contains &61 constant EIMSK \ External Interrupt Mask Register (where &61 is $3d) along with the other constants and is a very useful file. Tristan _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
