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[/] [a-z80/] [trunk/] [tools/] [dongle/] [neg/] [simulate-neg.py] - Diff between revs 3 and 8
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#!/usr/bin/env python
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#!/usr/bin/env python3
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#
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#
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# This script simulates 'neg' calculation and generates values for numbers 0-255.
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# This script simulates 'neg' calculation and generates values for numbers 0-255.
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# These can be compared with a real Z80 run values.
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# These can be compared with a real Z80 run values.
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#
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#
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import sys
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import sys
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vf = (carry_ins>>7)&1 # VF = Internal carry from bit [6] to [7]
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vf = (carry_ins>>7)&1 # VF = Internal carry from bit [6] to [7]
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vf ^= cf # XOR'ed with the final carry out
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vf ^= cf # XOR'ed with the final carry out
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flags = (sf<<7) | (zf<<6) | (yf<<5) | (hf<<4) | (xf<<3) | (vf<<2) | (nf<<1) | (cf<<0)
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flags = (sf<<7) | (zf<<6) | (yf<<5) | (hf<<4) | (xf<<3) | (vf<<2) | (nf<<1) | (cf<<0)
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print '%0.2X -> %0.2X Flags = %0.2X' % ( inA, finalA, flags)
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print ('%0.2X -> %0.2X Flags = %0.2X' % ( inA, finalA, flags))
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