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Portable Network Graphic  |  1997-07-26  |  95KB  |  816x1056  |  8-bit (256 colors)

Labels: book | bulletin board | crt screen | earth | poster | reckoner | sky
OCR: -Feb 171 bits X bisu thbbettonuage Programming 1age lress registers. Generally the are not Extension hold data.An uar ers hold memory addresses. ssap registers. Dn.W Un There are 8 address registers, 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 15 is copied ...

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