Hi, > When I do the command $1d c@ . I get a value of 0001000. How is that > possible? Or do I something wrong?
Historically Atmel defined 32 special addresses that together with certain opcodes that are used for some IO or CPU relevant things (e.g. the machine status register which is one of them). They are mapped into the "normal" memory addresses with an offset of 32 (0x20). "real" RAM memory starts at address $40 (32 registers and 32 IO registers). The lowest 32 "memory" addresses are used for the CPU registers itself. $1d is part of the Y register pair amforth uses as data stack pointer. HTH Matthias _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
