Motorola MC68306 Betriebsanweisung PDF herunterladen (Seite 43)

Table 4

MC68306 Symbols

Label Symbol Pattern (binary) Description

STAT dma 0xxx xxxx direct memory access

udat wr 1001 xxx0 user data write

udat rd 1001 xxx1 user data read

upgm rd 1010 xxx1 user program read

sdat wr 1101 xxx0 supervisor data write

sdat rd 1101 xxx1 supervisor data read

spgm rd 1110 xxx1 supervisor program read

int ack 1111 xxxx interrupt acknowledge

pgm rd 1x10 xxx1 program read

wr xxxx xxx0 write

rd xxxx xxx1 read

FC res 0 000 reserved, undefined

udat 1 001 user data

upgm 2 010 user program

res 3 011 reserved, undefined

res 4 100 reserved, undefined

sdat 5 101 supervisor data

spgm 6 110 supervisor program

cpu 7 111 CPU space

usr 0xx user

sup 1xx supervisor

dat x01 data

pgm x10 program

SIZE word 00 word transfer

high byte 01 high byte transfer

low byte 10 low byte transfer

R/~W rd 1 read

wr 0 write

DATA_B BSR 0110 0001 xxxx xxxx branch to subroutine

BRA 0110 0000 xxxx xxxx branch always

Bxx 0110 xxxx xxxx xxxx branch

RTx 0100 1110 0111 0xxx return

JSR 0100 1110 10xx xxxx jump to subroutine

JMP 0100 1110 11xx xxxx jump

Jxx 0100 1110 1xxx xxxx jump (JMP or JSR)

--- xxxx xxxx xxxx xxxx

Analyzing the Motorola MC68306

To display the configuration labels and symbols

2–6 MC68306 Preprocessor

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 88 89

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Motorola MC68306 Betriebsanweisung Seite 43