Sharp MCS-48 Specifications

DASMxVersion 1.30, 6th October 1999A microprocessor opcodedisassembler© Copyright 1996-1999 Conquest Consultants

 Page 9 Command Function/syntaxcpuSpecify the processor type.Syntax: cpu 2650 | 6502 | 65C00 | 65C59 | 65C02 |65C102 | 65C112 | 6301 | 6303 |

 Page 10 Output filesBy default, DASMx generates a disassembly listing file. This is similar to the fulllisting file generated by most assemb

 Page 11 ❏ pushing an address onto the stack and then, later, performing a returnfrom subroutine instruction (i.e. as a method of performing

 Page 12 Microprocessor specificsThe following sub-sections detail items of note relating to disassembly for thespecific microprocessors (and

 Page 13 MOS Technology/Rockwell 6502The MOS Technology/Rockwell 6502 has a similar instruction set to that of the6800 (but totally opcode inc

 Page 14 The Z80 has a great many (so called) undocumented instructions that (sometimes)perform useful functions. DASMx does not currently su

 Page 15 Generating Zilog Z80 style mnemonics from Intel 8080 code is possible because the8080 has an instruction set that is a compatible bin

 Page 16 currently beyond the capabilities of DASMx. For this reason, it is advised thatcode threading be not used if the size of the 8048 so

 Page 17 Number formatMicroprocessor manufacturers have chosen a variety of different formats forrepresenting hexadecimal numbers. [Some sort

 Page 18 Manufacturer cpu parameter FormatSignetics2650SigneticsMOS Technology6502MotorolaRockwell65C00MotorolaRockwell65C02MotorolaRockwell65

 Page 1 IntroductionDASMx is a disassembler for a range of common 8-bit microprocessors. Thefollowing main processor families are supported:❏

 Page 19 ❏ improved code threading (through use of a more complete emulation ofthe processor);❏ improved symbol table output in listing file

 Page 20 [5] 6502 Assembly Language Programming, Second Edition, Lance A.Leventhal,Osborne/McGraw-Hill, ISBN 0-07-881216-X, 1986.[6] R650X and

 Page 2 Summarising, the key features of DASMx are:❏ Disassembly of object code images for the following microprocessors:• Motorola 6800, 68

 Page 3 Version historyVersion Date Comments0.90 28th July 1996 First public release (as dasm6800): with supportfor 6800/6802/6808 only.1.00 2

 Page 4 ❏ User messages can now be specified and generated from the symbol file;❏ Symbol file includes (which may be nested) now permitted.T

 Page 5 CopyrightDASMx and all associated documentation are copyright Conquest Consultants.DisclaimerDASMx comes without any express or implie

 Page 6 power of two and will correspond to the length of the ROM. For example, the filesize of a complete image of a 27256 EPROM will be 32,

 Page 7 Command line optionsDASMx has the following command line options:-agenerate assembler output (default is to generate a full listing fi

 Page 8 Symbol file syntaxThe symbol file is a plain text file that may be created/modified with any texteditor. The file contains lines that