Editing Turbo Pascal (section)

====Version 1====
[[File:Turbo pascal 30 cover.jpg|thumb|Turbo Pascal 3.0 manual front cover]]

Version 1, released on 20 November 1983, was a basic all-in-one system, working in memory and producing [[COM file|.COM]] executable files for DOS and CP/M, and equivalent [[CMD file (CP/M)|.CMD]] executables for CP/M-86 (totally different from .CMD batch files later used in 32-bit Microsoft Windows). Source code files were limited to 64&nbsp;KB to simplify the IDE, and DOS .COM files were limited to 64&nbsp;KB each of code, stack and global (static) variables. Program source code could be extended by using the include facility if the source code exceeded the memory limit of the editor.
 
There were different versions of Turbo Pascal for computers running DOS, CP/M, or CP/M-86 with 64&nbsp;KB of memory and at least one floppy disk drive. The CP/M version could run on the many CP/M machines of the time with [[Zilog Z80|Z80]] processors, or an Apple II with Z80 card. The DOS and CP/M-86 versions ran on the many [[Intel 8086|8086]] and [[Intel 8088|8088]] machines which became available, including the IBM  PC. The installer, lister, and compiler with its IDE, and the source code for a simple spreadsheet program called MicroCalc written by Philippe Kahn as a demonstration, would fit on a single floppy disc. A disc copy without MicroCalc would accommodate the source code and compiled executable of a reasonable-sized program—as it was common at the time for users to have only a single floppy drive as [[mass storage]], it was a great convenience to be able to fit both the compiler and the program being written on a single disc, avoiding endless disc swapping.

The [[Computer architecture|architecture]] of the various machines running MS-DOS additionally limited the maximum user memory to under 1&nbsp;MB (e.g., [[IBM PC compatible|machines hardware-compatible with the IBM PC]] were limited to 640&nbsp;KB).

The Turbo Pascal IDE was very advanced for its day. It was able to perform well and compile very fast with the amount of RAM on a typical home computer. The IDE was simple and intuitive to use, and had a well-organized system of menus. Early versions of the editor used [[WordStar]] key functions, which was the [[de facto]] standard at the time. Later versions of the IDE, designed for PCs with more disk space and memory, could display the definitions of the keywords of the language by putting the cursor over a keyword and pressing the F1 key (conventionally used to display help). Many definitions included example code.

In addition to standard executable programs, the compiler could generate [[terminate-and-stay-resident]] (TSR) programs, small utilities that stayed in memory and let the computer do other tasks—running several programs at the same time, [[Computer multitasking|multitasking]], was not otherwise available. Borland produced a small application suite called [[Borland Sidekick|Sidekick]] that was a TSR letting the user keep a diary, notes, and so forth.