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https://opencores.org/ocsvn/a-z80/a-z80/trunk
[/] [a-z80/] [trunk/] [tools/] [dongle/] [daa/] [simulate-daa.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 'daa' calculation and generates values for numbers 0-255.
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# This script simulates 'daa' 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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# F:00 A:00 -> 00 F:44
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# F:00 A:00 -> 00 F:44
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inF = int(line[2:4], 16)
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inF = int(line[2:4], 16)
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inA = int(line[7:9], 16)
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inA = int(line[7:9], 16)
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outA = int(line[13:15], 16)
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outA = int(line[13:15], 16)
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outF = int(line[18:20], 16)
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outF = int(line[18:20], 16)
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#print 'F:' + ("%0.2X" % inF) + ' A:' + ("%0.2X" % inA) + ' -> ' + ("%0.2X" % outA) + ' F:' + ("%0.2X" % outF)
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#print ('F:' + ("%0.2X" % inF) + ' A:' + ("%0.2X" % inA) + ' -> ' + ("%0.2X" % outA) + ' F:' + ("%0.2X" % outF))
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# Get the flags that will determine daa operation
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# Get the flags that will determine daa operation
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hf = (inF>>4) & 1
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hf = (inF>>4) & 1
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nf = (inF>>1) & 1
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nf = (inF>>1) & 1
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cf = (inF>>0) & 1
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cf = (inF>>0) & 1
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pf = (((finalA>>7)^(finalA>>6)^(finalA>>5)^(finalA>>4)^(finalA>>3)^(finalA>>2)^(finalA>>1)^(finalA>>0))&1)^1
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pf = (((finalA>>7)^(finalA>>6)^(finalA>>5)^(finalA>>4)^(finalA>>3)^(finalA>>2)^(finalA>>1)^(finalA>>0))&1)^1
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nf = (inF>>1) & 1 # Always unchanged
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nf = (inF>>1) & 1 # Always unchanged
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flags = (sf<<7) | (zf<<6) | (yf<<5) | (hf<<4) | (xf<<3) | (pf<<2) | (nf<<1) | (cf<<0)
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flags = (sf<<7) | (zf<<6) | (yf<<5) | (hf<<4) | (xf<<3) | (pf<<2) | (nf<<1) | (cf<<0)
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print 'F:' + ("%0.2X" % inF) + ' A:' + ("%0.2X" % inA) + ' -> ' + ("%0.2X" % finalA) + ' F:' + ("%0.2X" % flags)
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print ('F:' + ("%0.2X" % inF) + ' A:' + ("%0.2X" % inA) + ' -> ' + ("%0.2X" % finalA) + ' F:' + ("%0.2X" % flags))
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