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Start 6809.
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94
6809.py
Executable file
94
6809.py
Executable file
@ -0,0 +1,94 @@
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##########################################################################
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#
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# Processor specific code
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# CPU = "6809"
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# Description = "Motorola 6809 8-bit microprocessor."
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# DataWidth = 8 # 8-bit data
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# AddressWidth = 16 # 16-bit addresses
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# Maximum length of an instruction (for formatting purposes)
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maxLength = 4
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# Leadin bytes for multbyte instructions
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leadInBytes = [0x10]
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# Addressing mode table
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addressModeTable = {
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"inherent" : "",
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"imm8" : "#${0:02X}",
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"imm16" : "#${0:02X}{1:02X}",
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"direct" : "${0:02X}",
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"indexed" : "${0:02X},x",
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"extended" : "${0:02X}{1:02X}",
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"rel8" : "${0:04X}",
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"rel16" : "${0:02X}{1:02X}",
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# Extended Indirect
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# Relative Indirect
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# Zero-offset Indexed
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# Zero-offset Indexed Indirect
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# Constant-offset Indexed
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# Constant-offset Indexed Indirect
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# Accumulator-offset Indexed
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# Accumulator-offset Indexed Indirect
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# Auto-Increment Indexed
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# Auto-Increment Indexed Indirect
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# Auto-Decrement Indexed
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# Auto-Decrement Indexed Indirect
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}
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# Op Code Table
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# Key is numeric opcode (possibly multiple bytes)
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# Value is a list:
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# # bytes
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# mnemonic
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# addressing mode.
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# flags (e.g. pcr)
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opcodeTable = {
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0x3a : [ 1, "abx", "inherent" ],
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0x89 : [ 2, "adca", "imm8" ],
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0x99 : [ 2, "adca", "direct" ],
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0xa9 : [ 2, "adca", "indexed" ],
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0xb9 : [ 3, "adca", "extended" ],
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0xc9 : [ 2, "adcb", "imm8" ],
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0xd9 : [ 2, "adcb", "direct" ],
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0xe9 : [ 2, "adcb", "indexed" ],
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0xf9 : [ 3, "adcb", "extended" ],
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0x8b : [ 2, "adda", "imm8" ],
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0x9b : [ 2, "adda", "direct" ],
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0xab : [ 2, "adda", "indexed" ],
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0xbb : [ 3, "adda", "extended" ],
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0xcb : [ 2, "addb", "imm8" ],
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0xdb : [ 2, "addb", "direct" ],
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0xeb : [ 2, "addb", "indexed" ],
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0xfb : [ 3, "addb", "extended" ],
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0xc3 : [ 3, "addd", "imm16" ],
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0xd3 : [ 2, "addd", "direct" ],
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0xe3 : [ 2, "addd", "indexed" ],
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0xf3 : [ 3, "addd", "extended" ],
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0x84 : [ 2, "anda", "imm8" ],
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0x94 : [ 2, "anda", "direct" ],
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0xa4 : [ 2, "anda", "indexed" ],
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0xb4 : [ 3, "anda", "extended" ],
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0xc4 : [ 2, "andb", "imm8" ],
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0xd4 : [ 2, "andb", "direct" ],
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0xe4 : [ 2, "andb", "indexed" ],
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0xf4 : [ 3, "andb", "extended" ],
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0x1C : [ 2, "andcc","imm8" ],
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0x26 : [ 2, "bne", "rel8", pcr ],
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0x26 : [ 2, "bne", "rel8", pcr ],
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0x1026 : [ 4, "lbne", "rel16", pcr ],
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0x00 : [ 2, "neg", "direct" ],
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0xff : [ 3, "stu", "extended" ],
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}
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# End of processor specific code
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##########################################################################
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6
udis.py
6
udis.py
@ -90,9 +90,10 @@ except FileNotFoundError:
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# line - line to output
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# leadin - extended opcode (true/false)
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s = " "
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# Print initial origin address
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if args.nolist is False:
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s = " "
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print("{0:04X}{1:s}.org ${2:04X}".format(address, s[0:maxLength*3+3], address))
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else:
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print(" .org ${0:04X}".format(address))
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@ -103,7 +104,6 @@ while True:
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if len(b) == 0: # handle EOF
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if args.nolist is False:
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s = " "
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print("{0:04X}{1:s}end".format(address, s[0:maxLength*3+3]))
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break
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@ -202,7 +202,7 @@ while True:
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# Handle case where invalid opcode has a leadin byte.
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if leadin is True:
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if args.nolist is False:
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mnemonic = " .byte ${0:02X},${1:02X}".format(opcode // 256, opcode % 256)
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mnemonic = "{0:s}.byte ${1:02X},${2:02X}".format(s[0:(maxLength-length-2)*3], opcode // 256, opcode % 256)
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else:
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mnemonic = ".byte ${0:02X},${1:02X}".format(opcode // 256, opcode % 256)
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else:
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