The help topics include BIOS interrupts, DOS interrupts, DOS functions, EMS and Mouse functions, BIOS and DOS data structures, diagnostic codes, DOS commands, 8086 assembler instructions, standard and vendor specific C functions and various hardware specifications.

2008年12月2日 · 内存控制块mcb说明. dos使用内存控制块来控制和管理内存，这是一个占16字节的结构，位于每个分配得到的内存块的起始地址再向前16个字节这样说可能不是太清楚，过一会再继续说。

In this article, I'll discuss how DOS uses memory control blocks and will present a Turbo C program named MCB.C that prints out DOS' current state of memory allocation. First, it might be useful to review how the PC uses memory. Figure 1, next page, shows the major aspects of the PC memory map as documented by Microsoft and IBM. Addresses are ...

2008年11月23日 · DOS实现内存管理的重要数据结构是内存控制块MCB（Memory Control Block）。 通过MCB把已分配和空闲的内存按位置顺序连成链。 DOS的内存块大小以“节”为单位，1节等于16字节。

10 nbytes first byte of actual allocated memory block. - to find the first MCB in the chain, use INT 21,52 . - DOS 3.1+ the first memory block contains the DOS data segment. ie., installable drivers, buffers, etc. - DOS 4.x the first memory block is divided into subsegments, with their own memory control blocks; offset 0000h is the first.

2001年8月4日 · MCB is dos's very basic idea of memory management. if you use dos memory funcs (0x48, etc). alloc a piece of memory. 0x1000h say, sub 1 from its result, this points to the mcb. the mcb contains 3 fields (iirc), one saying (M/Z) if its end of chain/not end of chain, size in paragraphs, and 8 bytes or something for name of what alloced it, and a ...

2016年1月12日 · dos系统以链接的方式分配内存，链接的过程可以从内存控制块中的有关信息看出来。 16字 丽=不丙焉 磊 i孚一 节的意义如下： 0字节 是一个登记项，若本控制区域是链中的一个区域，则为 4Dj若本控制区域是链 中的最 后一个 区域，则为5A。

2016年8月12日 · Run DOS applications in Windows. "DOS MCB list corrupted" and my wholesaling program break. What now? What version of vDos do you use? Is your program started with loading some TSR? Does the “DOS MCB list corrupted” come immediately or after using some specific function?

The concept of a memory control block (MCB) was introduced in MS-DOS, Version 2.0, as the operating system's basic method of tracking memory allocation for application programs and installable device drivers.

2016年1月13日 · When using vdos-lfn, as soon as we try to print to the label printer, we have a message box saying "DOS MCB List is corrupt !". When using DosBox, it just works ( with serial1=directserial realport:com1 ), but we can't use it because there is no file locking.