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author | 2015-11-29 21:59:13 -0200 | |
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committer | 2015-12-06 13:32:04 -0200 | |
commit | b1960f236073ec1c3269bb8a8382dfea90743bff (patch) | |
tree | 49ba9cd467a1b22390261cf14c13707c4109d3e8 /src | |
parent | b6e4298ee6cbcd95747e44096666e41b83565ed3 (diff) |
[patinho] Implement instructions LIM, INC, UNEG and LIMP1
Diffstat (limited to 'src')
-rw-r--r-- | src/devices/cpu/patinhofeio/patinho_feio.cpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/devices/cpu/patinhofeio/patinho_feio.cpp b/src/devices/cpu/patinhofeio/patinho_feio.cpp index f0c8ee8e1ba..4f2baa16382 100644 --- a/src/devices/cpu/patinhofeio/patinho_feio.cpp +++ b/src/devices/cpu/patinhofeio/patinho_feio.cpp @@ -131,6 +131,29 @@ void patinho_feio_cpu_device::execute_instruction() ACC = ~ACC + 1; FLAGS = 0; //TODO: fix-me (I'm not sure yet how to compute the flags here) return; + case 0x84: + //LIM="Limpa": + // Clear flags + FLAGS = 0; + return; + case 0x85: + //INC: + // Increment accumulator + ACC++; + FLAGS = 0; //TODO: fix-me (I'm not sure yet how to compute the flags here) + return; + case 0x86: + //UNEG="Um Negativo": + // Load -1 into accumulator and clear flags + ACC = -1; + FLAGS = 0; + return; + case 0x87: + //LIMP1: + // Clear accumulator and sets V=1 + ACC = 0; + FLAGS = V; + return; case 0x9A: //INIB="Inibe" // disables interrupts |