Tristan, I have found the datasheet.
Cheers, Jan Verstuurd vanaf mijn iPad > Op 5 nov. 2018 om 11:26 heeft Jan Kromhout <krom1...@hotmail.com> het > volgende geschreven: > > Tristan, > > Thanks again for your hulp. > Please can you provide me the link to download the datasheet your mention. > When I look to the > datasheets they only have about 25 pages!!. > > Cheers, > > Jan > > >> Op 5 nov. 2018, om 09:47 heeft Tristan Williams <h...@tjnw.co.uk> het >> volgende geschreven: >> >> 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 > > > > _______________________________________________ > Amforth-devel mailing list for http://amforth.sf.net/ > Amforth-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/amforth-devel _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
