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vt100-games/Snake/TP/READ.ME

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Welcome to TURBO PASCAL Version 3.0!
------------------------------------
In spite of all efforts, some errors have found their way into
the new TURBO 3.0 manual. This file contains all the necessary
corrections and additions, and we apologize for any inconvenience
this may cause you.
Please make a working copy of your TURBO disk and store the ori-
ginal in a safe place. For help making a backup copy, please
refer to appendix M of the TURBO PASCAL Reference Manual.
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD>to installing TURBO PASCAL.
*******************************************
* *
* Need help with TURBO? Please see *
* Appendix N in your Reference Manual *
* for answers to common questions. *
* *
*******************************************
-------------------
Contents of the READ.ME File
----------------------------
1. CORRECTIONS to the 3.0 Reference Manual [ All versions ]
2. OMMISSIONS from the 3.0 Reference Manual [ All versions ]
3. New FEATURES [ CP/M-80 ]
4. ADDITIONAL FILE LIST [ CP/M-80 ]
-------------------
CORRECTIONS
-----------
Page 253 - MOV AL,[BP-1]
------------------------
The correct statement is: MOV AL,[BP+4]
Page 293 - TURBO-BCD will compile and run any program
-----------------------------------------------------
Well - almost. The Real functions Sin, Cos, ArcTan, Ln, Exp,
and Sqrt and the pre-declared constant Pi are not available
in TURBOBCD. <0A>
-------------------
OMISSIONS
---------
User Written Error Handlers
---------------------------
In Turbo Pascal 3.0 you may write your own error handler,
which is called in case of an I/O or Run-time error. The
procedure must have the following header:
procedure Error(ErrNo, ErrAddr: Integer);
The name of the procedure and its parameters are unim-
portant, as long as it is a procedure with two value
parameters of type Integer.
The value passed in ErrNo is the error type and number. The
most significant byte, i.e. "Hi(ErrNo)", contains the error
type, and the least significant byte, i.e. "Lo(ErrNo)",
contains the error number (see Appendix F or G in the Turbo
Pascal Manual).
The following error types are defined:
0 User Break (Ctrl-C).
1 I/O error.
2 Run-time error.
In case of a user interrupt (Ctrl-C), the low byte of
"ErrNo" is always 1. "ErrAddr" contains the address (offset
in Code Segment for 16 bit versions) of the error.
To activate the error handler, assign its offset address
to the standard variable "ErrorPtr", i.e.
ErrorPtr:=Ofs(Error); { 16 bit } or
ErrorPtr:=Addr(Error); { 8 bit }
There are no limits to what an error handler may do. Typi-
cally it will close all open files, output an error mes-
sage, and call the Halt standard procedure to terminate the
program. If an error handler returns, i.e. if it does
not call Halt, or if an error occurs within an error
handler, Turbo Pascal will itself output the error message
and terminate the program.
------------------- <0A>
NEW FEATURES OF CP/M-80 IMPLEMENTATION OF
TURBO 3.0
- AN OVERVIEW -
-----------------------------------------
Inline
------
A constant identifier used in an INLINE statement does not
always generate two bytes of code.
Files
-----
New FIB formats.
Optional 4th parameter on Blockread/Write returns number of
blocks actually read.
SeekEoln function.
SeekEof function.
Misc.
-----
Exit procedure - To exit the current block
OvrDrive procedure - To specify the drive on which to find overlays
ParamCount function - Gives number of characters in the command buffer
ParamStr function - Gives the string of characters in the command line
Overlays
--------
Overlay files are opened and closed every time they are
accessed. Therefore, there is never a need to specifically
close an overlay file.
The Y compiler directive is no longer supported. Instead,
the OvrPath (MS-DOS) or OvrDrive (CP/M) standard proce-
dures may be used to specify the drive and subdirectory
in which overlay files reside.
Please note that run-time error F0 indicates that your over-
lay file is missing or is called recursively. (This error
number is omitted from the Reference Manual but is included
elsewhere in this file.)
-------------------
TURBO PASCAL Version 3.0
CP/M-80
Additional File List
In addition to the list of files mentioned in Chapter 1 of
your TURBO Reference Manual, the following files are included
on your TURBO disk: <0A>
Sample programs
---------------
LISTER PAS - simple program to list your Pascal source
CMDLIN PAS - get parameters from the command line
MC PAS - sample spreadsheet program - MAIN MODULE
MC-MOD00 INC - sample spreadsheet program - INCLUDE MODULE 00
MC-MOD01 INC - sample spreadsheet program - INCLUDE MODULE 01
MC-MOD02 INC - sample spreadsheet program - INCLUDE MODULE 02
MC-MOD03 INC - sample spreadsheet program - INCLUDE MODULE 03
MC-MOD04 INC - sample spreadsheet program - INCLUDE MODULE 04
MC-MOD05 INC - sample spreadsheet program - INCLUDE MODULE 05
MC HLP - spreadsheet help file
MCDEMO MCS - spreadsheet data file (not for use with TURBO-87)
---------------------------------------------------------------------

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