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Tpw 03 Pc Link Software Download: Everything You Need to Know About TPW-03 PLC



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Tpw 03 Pc Link Software Download




Turbo Pascal is a software development system that includes a compiler and an integrated development environment (IDE) for the Pascal programming language running on CP/M, CP/M-86, and DOS. It was originally developed by Anders Hejlsberg at Borland, and was notable for its extremely fast compilation. Turbo Pascal, and the later but similar Turbo C, made Borland a leader in PC-based development.


For versions 6 and 7 (last), both a lower-priced Turbo Pascal and more expensive Borland Pascal were produced; Borland Pascal was more oriented toward professional software development, with more libraries and standard library source code. The name Borland Pascal is also used more generically for Borland's dialect of the Pascal programming language, significantly different from Standard Pascal.


Philippe Kahn first saw an opportunity for Borland, his newly formed software company, in the field of programming tools. Historically, the vast majority of programmers saw their workflow in terms of the edit/compile/link cycle, with separate tools dedicated to each task. Programmers wrote source code using a text editor; the source code was then compiled into object code (often requiring multiple passes), and a linker combined object code with runtime libraries to produce an executable program.


Unlike some other development tools, Turbo Pascal disks had no copy protection. Turbo Pascal came with the "Book License": "You must treat this software just like a book ... [it] may be used by any number of people ... may be freely moved from one computer location to another, so long as there is no possibility of it being used at one location while it's being used at another."[8]


Jerry Pournelle wrote in February 1984 that Turbo Pascal "comes close to what I think the computer industry is headed for: well documented, standard, plenty of good features, and a reasonable price". He disliked the requirement to buy another license to distribute binaries, but noted that "it turns out not to be a lot more. Borland only wants another $100" more than the $49.95 base price, and that "my first impression of Turbo is that it's probably worth $149.95. It looks to do everything MT+ with the Speed Programming Package does, and maybe even do it faster and better".[11] Pournelle reported in July that, according to Kahn, IBM had refused to resell Turbo Pascal unless the price was at least $200; Pournelle noted that "Turbo is much better than the Pascal IBM sells", and unlike the latter was compatible with the IBM PCjr.[12] Three Byte reviewers praised Turbo Pascal in the same issue, calling the DOS version "without doubt, the best software value I have ever purchased" and the CP/M version "an excellent product" for which "[Borland] deserves praise".[13]


Despite finding what "a serious bug" in version 3.0, and decreased compatibility with PC clones, Byte in February 1986 stated that "it is hard to avoid recommending Turbo to anyone who wants to program in Pascal", citing improved speed and graphic routines.[14] When reviewing four other Pascal compilers in December 1986, the magazine described Turbo Pascal as "practical and attractive to programmers at all levels of expertise".[15] Webster also praised the language, stating in August 1985 that Turbo Pascal "is best known for its small size, incredible compile speeds, and fast execution times". He noted that the software's quality and low price was especially surprising after the "JRT Pascal fiasco", and stated that even at the new higher $69.95 price, version 3.0 was "probably still the best software deal on the market".[9]


PC Magazine was similarly complimentary in November 1984, stating that "nothing like Turbo Pascal has ever existed for PC-DOS before". It praised the software's low price, speed, and unusually good documentation for a compiler, and noted the existence of many utilities for Turbo Pascal from other companies. The review stated that the IDE that simplified the edit-compile-run-debug loop made Turbo Pascal accessible, like BASIC, to new programmers.[16]


Separate compilation was not part of the standard Pascal language, but was already available in UCSD Pascal, which was very popular on 8-bit machines. Turbo Pascal syntax for units appears to have been borrowed from UCSD Pascal.[24] Earlier versions of Turbo Pascal, designed for computers with limited resources, supported a "chain and execute" system of dynamic linking for separately compiled objects, similar to the system widely used in BASIC. Also, the language had a statement to include separate source code in a program when necessary, and overlaying was supported from TP3, but, as with overlays, chained objects had to fit into the original (limited) program memory space. As computing and storage facilities advanced, the ability to generate large EXE files was added to Turbo Pascal, with the ability to statically link and collectively load separately compiled objects.


The .TPU files output by compiling a Turbo Pascal unit are tightly linked to the internal structures of the compiler, rather than standard .OBJ linkable files. This improved compilation and linkage times, but meant that .TPU files could not be linked with the output of other languages or even used with different releases of Turbo Pascal unless recompiled from source.


In the early days, Real was the most popular. Most PCs of the era did not have a floating point coprocessor so all FP had to be done in software. Borland's own FP algorithms on Real were quicker than using the other types, though its library also emulated the other types in software.


Version 2, released a few months later on 17 April 1984, was an incremental improvement to the original Turbo Pascal, to the point that the reference manual was at first identical to version 1's, down to having 1983 as the copyright date on some of the compiler's sample output, but had a separate "Addendum to Reference Manual: Version 2.0 and 8087 Supplement" manual with separate page numbering.[32] Additions included an overlay system, where separate overlay procedures would be automatically swapped from disk into a reserved space in memory. This memory was part of the 64kB RAM used by the program's code, and was automatically the size of the largest overlay procedure.[32] Overlay procedures could include overlay sections themselves, but unless a RAM disk was used, the resulting disk swapping could be slow. 2.0 also added the Dispose procedure to manage the heap, allowing individual dynamic variables to be freed, as an alternative to the more primitive 'Mark/Release' system and increased compatibility with WordStar commands plus use of the numeric keypad on the IBM PC and compatibles.[32] Such PCs also had new text window and CGA graphics mode commands as well as being able to use the PC's speaker for tones. Finally, DOS and CP/M-86 machines with an 8087 maths coprocessor (or later compatible) had an alternative TURBO-87 compiler available to purchase.[32] It supported the 8087's long real data types with a range of 1.67E-307 to 1.67E+308 to 14 significant figure precision but with a much greater processing speed. The manual notes that although source code for the Turbo Pascal's software real data types offering a range of 1E-63 to 1E+63 to 11 significant figures, these were incompatible at a binary level: as well as having a much larger range, the software reals took six bytes in memory and the 8087 ones were eight.


Version 3 was released on 17 September 1986.[34] Turbo Pascal 3 supported turtle graphics.[35] In addition to the default software real numbers and 8087 edition of the compiler, Borland also offered a BCD version (TURBOBCD) which offered the same numeric range as real data types but to 18 significant figures.[34]


Borland released several versions of Turbo Pascal as freeware after they became "antique software" (abandonware),[42] with 1.0 for DOS on 1 February 2000, 3.02 on 10 February 2000, 5.5 on 21 February 2002, Turbo Pascal 7.01 French version in year 2000.[43] Most of the downloads are still available on the successor website of Embarcadero Technologies.[2][3][4]


Some lecturers[who?] prefer to use Borland Pascal 7 or Turbo Pascal 5.5 because of its simplicity in comparison to more modern IDEs such as Microsoft Visual Studio or Borland JBuilder, so it introduces students unfamiliar with computing to common tasks such as using the keyboard and keyboard shortcuts (TP 5.5 has no mouse support), familiarises them with DOS commands (which are largely the same as those of Microsoft Windows's command prompt), and lets them write programs without spending a lot of effort on getting the environment to work. TP 5.5 is available as a free download from Borland.[42][43]


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