Part 2 of the history of DOS: DOS Version 1 - China DOS Union Forum

Sender: ccccccc (Big Mouth★BBS Syndrome), Board: DOS
Subject: Part 2 of the history of DOS: DOS Version 1
Posted at: Shuimu Tsinghua BBS (Thu May 20 01:09:39 1999)

Sender: dos (White Bunny), Board: DOS
Subject: Part 2 of the history of DOS: DOS Version 1
Posted at: Yixian Space Yat-sen Channel (Sun Apr 4 10:28:43 1999), on-site mail

Based on the 86-DOS operating system, Microsoft developed MS-DOS Version 1.0. This operating system was
released in 1981 together with the earliest IBM PC.
DOS 1.0 did not support hierarchical directories. All file access had to go through file control blocks, a technology
inherited from CP/M. DOS 1.0 supported two types of executable files: COM and EXE. The format of COM files was similar to CP/M executable
files, and they were subject to the 64KB memory limit used for code, data, and stack space. In addition, Version 1.0
introduced batch files.
Because the earliest IBM PC had only 64KB of memory, memory was very tight. To reduce the total memory
required by the command processor (COMMAND.COM), Version 1.0 divided the command processor into a resident part and
a transient part. The latter could be overwritten by other DOS programs while a program was running. When the program finished running, the resident
part checked the transient part, and if necessary, the resident part reloaded it from disk into memory.
When Microsoft supplied DOS to IBM, IBM used the name PC DOS to indicate its close relationship
with the IBM PC.
Commands provided in DOS Version 1
CHKDSK DEBUG ERAS REM COMMAND DIR FORMAT
REN COMP DISKCOMP LINK SYS COPY DISKCOPY
MODE TIME DATE EDLIN PAUSE TYPE

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Floor1　ko20010214	Posted 2003-06-01 00:00
版主　Posts 1,628　Credits 7,296
Sender: ccccccc (Big Mouth★BBS Syndrome), Board: DOS Subject: Part 2 of the history of DOS: DOS Version 1 Posted at: Shuimu Tsinghua BBS (Thu May 20 01:09:39 1999) Sender: dos (White Bunny), Board: DOS Subject: Part 2 of the history of DOS: DOS Version 1 Posted at: Yixian Space Yat-sen Channel (Sun Apr 4 10:28:43 1999), on-site mail Based on the 86-DOS operating system, Microsoft developed MS-DOS Version 1.0. This operating system was released in 1981 together with the earliest IBM PC. DOS 1.0 did not support hierarchical directories. All file access had to go through file control blocks, a technology inherited from CP/M. DOS 1.0 supported two types of executable files: COM and EXE. The format of COM files was similar to CP/M executable files, and they were subject to the 64KB memory limit used for code, data, and stack space. In addition, Version 1.0 introduced batch files. Because the earliest IBM PC had only 64KB of memory, memory was very tight. To reduce the total memory required by the command processor (COMMAND.COM), Version 1.0 divided the command processor into a resident part and a transient part. The latter could be overwritten by other DOS programs while a program was running. When the program finished running, the resident part checked the transient part, and if necessary, the resident part reloaded it from disk into memory. When Microsoft supplied DOS to IBM, IBM used the name PC DOS to indicate its close relationship with the IBM PC. Commands provided in DOS Version 1 CHKDSK DEBUG ERAS REM COMMAND DIR FORMAT REN COMP DISKCOMP LINK SYS COPY DISKCOPY MODE TIME DATE EDLIN PAUSE TYPE -- ※ Source:·Shuimu Tsinghua BBS bbs.net.tsinghua.edu.cn· (This article was copied using the S-Term article copy script) ==================================================