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Questions tagged [pascal]

For questions regarding the use or installation of the Pascal language on retrocomputers.

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1answer
180 views

Was dynamic type check in Pascal commonplace?

The BESM-6 Pascal compiler I'm experimenting with has a notable difference from Standard Pascal: formal arguments of formal parameters-procedures or functions are not specified, but are checked at ...
28
votes
3answers
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Was Dennis Ritchie being too modest in this quote about C and Pascal?

In his 1993 conference proceeding The Development of the C Language, Dennis Ritchie stated Successors C and even B have several direct descendants, though they do not rival Pascal in ...
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votes
1answer
130 views

How to transfer file from one disk to another in Apple //e (Applewin)

For the nostalgia, I'm going through Apple Pascal - A Hands-on Approach using AppleWin. There are four disks, pascal0 through pascal3, and for some reason pascal0 is missing a file called SYSTEM....
6
votes
2answers
311 views

Why is the following p-Code generated by the Apple 3 pascal compiler?

On an Apple 3 the following pascal function function randu( High: integer): integer; begin randu:= random mod High end; will be translated to Proc = 06 Typ = P-Code codeBeg = 02A6 Exitcode=...
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votes
3answers
679 views

x86 as a Pascal Machine?

From this answer by gsg about the usage of certain x86 instructions: Note that the x86 was originally designed as a Pascal machine, which is why there are instructions to support nested functions (...
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6answers
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What caused the downfall of Pascal? [closed]

From 1985 to 1990 Borland's Turbo Pascal was at least as popular as C for DOS systems. Turbo Pascal was especially popular because of it's ground breaking BGI graphics interface while C was stalled in ...
29
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5answers
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Why was nil defined as a reserved word in Pascal?

In Pascal, nil (the pointer value to "nothing") is a reserved word. Why wasn't it simply a predefined identifier as true and false are, for example? This is stated in PASCAL User Manual and Report p....
34
votes
3answers
5k views

What was the point of Apple Pascal having its own file system?

Apple's UCSD Pascal for the Apple II used its own file system rather than the existing DOS 3.3 of the day. I'm not sure if it overlapped SOS at all, but regardless of timelines it seems that the ...
5
votes
3answers
599 views

When were the analogs of the C operators “break” and “continue” introduced in Pascal?

When published in 1970, the Pascal language did not have a way to implement the functionality equivalent to the (future) C language operators "break" and "continue". Their convenience having been ...
31
votes
3answers
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Where does this esoteric Pascal operator come from?

In the documentation for an implementation of Pascal for a Soviet computer, I've encountered a very weird language extension. I'll try to translate it: Branching operator (branch) Syntax &...