ASxxxx Cross Assemblers, Version 5.50, September 2023 Submitted by Alan R. Baldwin, Kent State University, Kent, Ohio Operating System: Linux, Windows, MS-DOS or other supporting ANSI C. Source Language: C Abstract: The ASxxxx assemblers are a series of microprocessor assem- blers written in the C programming language. This collection contains cross assemblers for the 1802, S2650, SC/MP, 4040(4004), MPS430, 6100, 61860, 6500, 6800(6802/6808), 6801(6803/HD6303), 6804, 6805, 68HC(S)08, 6809, 68HC11, 68HC(S)12, 68HC16, 68CF 68K, 740, 78K/0, 78K/0S, 8008, 8008S, 8048(8041/8022/8021), 8051, 8085(8080), AT89LP, 8X300(8X305), COP4, COP8, DS8XCXXX, AVR, EZ8, EZ80, F2MC8L/FX, F8/3870, GameBoy(Z80), H8/3xx, Cypress PSoC(M8C), PDP11, PIC, Rabbit 2000/3000, RS08, ST6, ST7, ST8, SX, Z8, Z80(HD64180), and Z280 series microprocessors. Each assembler has a device specific section which includes: (1) device description, byte order, and file extension information, (2) a table of assembler general directives, special directives, assembler mnemonics and asso- ciated operation codes, (3) machine specific code for processing the device mnemonics, addressing modes, and special directives. The assemblers have a common device independent section which handles the details of file input/output, symbol table genera- tion, program/data areas, expression analysis, and assembler directive processing. The assemblers provide the following features: (1) alpha- betized, formatted symbol table listings, (2) relocatable object modules, (3) global symbols for linking object modules, (4) con- ditional assembly directives, (5) reusable local symbols, (6) include-file processing, and (7) a general macro processing facility. The companion program ASLINK is a relocating linker perform- ing the following functions: (1) bind multiple object modules into a single memory image, (2) resolve inter-module symbol references, (3) resolve undefined symbols from specified librarys of object modules, (4) process absolute, relative, con- catenated, and overlay attributes in data and program sections, (5) perform byte and word program-counter relative (pc or pcr) addressing calculations, (6) define absolute symbol values at link time, (7) define absolute area base address values at link time, (8) produce an Intel Hex record, Motorola S record or Tandy CoCo Disk Basic output file, (9) produce a map of the linked memory image, and (10) update the ASxxxx assembler listing files with the absolute linked addresses and data. The assemblers and linker have been tested using Linux and DJGPP, Cygwin, Symantec C/C++ V7.2, Borland Turbo C++ 3.0, Open Watcom V1.9, VC6, Visual Studio 2005, 2010, 2013, 2015, 2019 and 2022. Complete source code and documentation for the assemblers and linker is included with the distribution. Additionally, test code for each assembler and several microprocessor monitors ( ASSIST05 for the 6805, MONDEB and ASSIST09 for the 6809, BUF- FALO 2.5 for the 6811, and MONDEB for 8051 / AT89LP series ) are included as working examples of use of these assemblers.
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by Martin Tayler
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Last Updated: September 2023