By Ray Duncan
This advisor addresses key programming issues, together with personality units, mass garage, reminiscence administration and strategy administration. The reference part information every one MS-DOS functionality name and interrupt and the BIOS interrupts. New and elevated fabric during this version comprises, process services for all present types of MS-DOS, ROM BIOS details for fastened disk, EGA, VGA, PC/AT and PS/2, model 4.0 of the Lotus/Intel/Microsoft multiplied reminiscence specification, writing "well-behaved" as opposed to "hardware-dependent" functions, and compatibility issues for OS/2
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Extra resources for Advanced MS DOS programming : the Microsoft guide for Assembly language and C programmers
1# VERSION . . . . . . 1# CODE . . . . . . . 21 CR . . . . . . . . 17# 46 47 DATA . . . . . . . txt LF . . . . . . . . 18# 46 47 MSG. . . . . . . . 33 46# MSG_LEN. . . . . . . 32 49# PRINT. . . . . . . 25# 39 60 STACK. . . . . . . 23 54# 54 STDERR . . . . . . . 15# STDIN. . . . . . . 13# STDOUT . . . . . . . 14# 31 58 _DATA. . . . . . . 23 27 _TEXT. . . . . . . 21# 23 51 44# 41 15 Symbols —————————————————————————————————————————————————————————————————————————— Figure 4-5.
EXE assembly-language programs, let's backtrack and discuss their elements a little more formally. The following discussion is based on the Microsoft Macro Assembler, hereafter referred to as MASM. If you are familiar with MASM and are an experienced assembly-language programmer, you may want to skip this section. MASM programs can be thought of as having three structural levels: · The module level · The segment level · The procedure level Modules are simply chunks of source code that can be independently maintained and assembled.
However, if you want to use the full range of attributes, you might want to read the detailed explanation in the MASM manual. Programs are classified into one memory model or another based on the number of their code and data segments. txt large models (Figure 3-9). ) Model Code segments Data segments —————————————————————————————————————————————————————————————————————————— Small One One Medium Multiple One Compact One Multiple Large Multiple Multiple —————————————————————————————————————————————————————————————————————————— Figure 3-9.
Advanced MS DOS programming : the Microsoft guide for Assembly language and C programmers by Ray Duncan