unit zxlib

ZX Spectrum library

author: Bostjan Gorisek (Gury)

Register Variables:

name:	address:	type:	description:
CHBAS	$2F4	byte	Character base address
RAMTOP	$6A	byte	RAM top memory address

Interface:

name:	description:
PrintAt	procedure PrintAt (y, x : byte; c : char); overload; Print character on location y, x in text mode 0 parameters: y - coordinate Y x - coordinate X c - character to be displayed
PrintAt	procedure PrintAt (y, x : byte; text : string); overload; Print string on location y, x in text mode 0 parameters: y - coordinate Y x - coordinate X text - string to be displayed
PrintAt	procedure PrintAt (var f : file; y, x : byte; c : char); overload; Print character on location y, x to screen device S: parameters: f - variable holder for screen device S: (text mode 1, 2) y - coordinate Y x - coordinate X c - character to be displayed
PrintAt	procedure PrintAt (var f : file; y, x : byte; text : string); overload; Print string on location y, x to screen device S: parameters: f - variable holder for screen device S: (text mode 1, 2) y - coordinate Y x - coordinate X text - string to be displayed
Flash	procedure Flash (y, x : byte; char01, char02 : char); overload; Alternate flashing of two characters on location y, x parameters: y - coordinate Y x - coordinate X char01 - first character to flash char02 - second character to flash
Flash	procedure Flash (y, x : byte; str : string); overload; Alternate flashing text on location y, x parameters: y - coordinate Y x - coordinate X str - flashing string
Flash	procedure Flash (var f : file; y, x : byte; str : string); overload; Alternate flashing text on location y, x on screen device S: parameters: f - variable holder for screen device S: (text mode 1, 2) y - coordinate Y x - coordinate X str - flashing string
Flash	procedure Flash (var f : file; y, x, rep : byte; str : string); overload; Alternate flashing text on location y, x on screen device S: parameters: f - variable holder for screen device S: (text mode 1, 2) y - coordinate Y x - coordinate X str - flashing string
Screen	function Screen (y, x : byte) : char; overload; Locate character on location y, x in text mode 0 parameters: y - coordinate Y x - coordinate X
Screen	function Screen (var f : file; y, x : byte) : char; overload; Locate character on location y, x on screen device S: parameters: f - variable holder for screen device S: (text mode 1, 2) y - coordinate Y x - coordinate X
ZXTitle	procedure ZXTitle (title : string; y, x : byte; author, dev, text, misc : string); ZX Spectrum title screen parameters: title - title name y - coordinate Y x - coordinate X author - author dev - port by... text - miscellaneous text misc - additional text
SetRAM	function SetRAM (pages : byte) : word; Set new top free RAM and character set address parameters: pages - number of pages reserved at the top of free memory
Sgn	function Sgn (number : integer) : integer; Return signed or zero number depending on input number parameters: number - Number to be checked returns: number > 0: returned value 1 number < 0: returned value -1 number = 0: returned value 0