Labels:book | bulletin board | reckoner | sky OCR: yved Aug 2t 76 bits FBItSTA phobettenguage Programming 1Rage lress registers. Generally the are not -xtension hold data.An Dn ers hold memory addresses. wdress registers. Ai Dn.W There are 8 address registers, Un nuUCIcu AV Address registers normally hold 32 bit quantity, but can be used as 16 bit quantities. When poom is into an register 1 is sign extended to 32 bits. This means that bit 15 copied into bits 6 31. Bits are always numbered from upwards, thus bit IS the least significant bit (LSB) and bit 3 IS the most significant bit MSB. The notation A0 used indicate the word part of an address register. The suffix R (for byte Is not allowed for address registers Examples: move. l d0,a2 this moves 32 bits from data register 0 to reg move d1.a3 this moves 16 bits from D1 to A3 Once n A3 bit ...
