| 词条 | MACRO-11 |
| 释义 |
MACRO-11 is an assembly language with macro facilities for PDP-11 minicomputers from Digital Equipment Corporation (DEC). It is the successor to PAL-11 (Program Assembler Loader), an earlier version of the PDP-11 assembly language without macro facilities. The MACRO-11 assembly language was designed for the PDP-11 minicomputer family. It was supported on all DEC PDP-11 operating systems. PDP-11 Unix systems also include an assembler (called "as"), structurally similar to MACRO-11 but with different syntax and fewer features. Programming exampleA complete "Hello, world!" program in PDP-11 macro assembler, to run under RT-11: .TITLE HELLO WORLD .MCALL .TTYOUT,.EXIT HELLO:: MOV #MSG,R1 ;STARTING ADDRESS OF STRING 1$: MOVB (R1)+,R0 ;FETCH NEXT CHARACTER BEQ DONE ;IF ZERO, EXIT LOOP .TTYOUT ;OTHERWISE PRINT IT BR 1$ ;REPEAT LOOP DONE: .EXIT MSG: .ASCIZ /Hello, world!/ The .MCALL pseudo-op warns the assembler that the code will be using the .TTYOUT and .EXIT macros. The .TTYOUT and .EXIT macros are defined in the standard system macro library to expand to the EMT instructions to call the RT-11 monitor to perform the requested functions. If this file is HELLO.MAC, the RT-11 commands to assemble, link and run (with console output shown) are as follows: .MACRO HELLO ERRORS DETECTED: 0 .LINK HELLO .R HELLO Hello, world! . (The RT-11 command prompt is ".") For a more complicated example of MACRO-11 code, two examples chosen at random are Kevin Murrell's KPUN.MAC, or Farba Research's [https://web.archive.org/web/20080905182149/http://www.farbaresearch.com/examples/julian.htm JULIAN] routine. More extensive libraries of PDP-11 code can be found in the Metalab freeware and Trailing Edge archives.[1][2] References1. ^Metalab 2. ^Trailing Edge External links
2 : Assembly languages|PDP-11 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。