Difference between revisions of "BNC"

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Line 5: Line 5:
<tr><td>CP1610 Clock Cycles</td><td>7 or 9</td></tr>
<tr><td>CP1610 Clock Cycles</td><td>7 or 9</td></tr>
<tr><td>Opcode Range</td><td>$0201, $0221</td></tr>
<tr><td>Opcode Range</td><td>$0209, $0229</td></tr>

Revision as of 17:13, 12 January 2005

Instruction NameBranch on No Carry
CP1610 Clock Cycles7 or 9
Opcode Range$0209, $0229

The Branch on No Carry opcode (BNC) is a two-decle opcode that is a part of the Branch family of opcodes. This instruction causes the CP1610 to branch if the Carry Flag is clear to the address specified by the following parameters.

   Format - Decle #1    Format - Word #2 (Unknown if all 16 bits are significant)
   0000:0010:00d0:1001  aaaa:aaaa:aaaa:aaaa
d indicates the direction of the branch such that: d == 0 indicates to branch in the forward direction d == 1 indicates to branch in the reverse direction
aaaaaaaaaaaaaaaa indicates the amount of offset

See the Branch opcode family documentation for more information.