te_apple.c

/*	te_apple.c

	Text editor -- version for the Apple II with SoftCard and
	a SOROC IQ 120 / 140 CRT.

	Copyright (c) 2021 Miguel Garcia / FloppySoftware

	This program is free software; you can redistribute it and/or modify it
	under the terms of the GNU General Public License as published by the
	Free Software Foundation; either version 2, or (at your option) any
	later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

	Usage:

	te_apple [filename]

	Compilation:

	cc te_apple
	ccopt te_apple
	zsm te_apple
	hextocom te_apple

	Changes:

	14 Oct 2021 : 1st version.

	Notes:

	The Apple II with SoftCard runs CP/M v2.2. The SOROC IQ 120 / 140 is
	a 24x80 CRT with specific screen escape sequences.
*/

/* Default configuration values
   ----------------------------
*/
#define CRT_DEF_ROWS 24
#define CRT_DEF_COLS 80

/* Options
   -------
   Set to 1 to add the following functionalities, else 0.
*/
#define OPT_LWORD 0  /* Go to word on the left */
#define OPT_RWORD 0  /* Go to word on the right */
#define OPT_FIND  1  /* Find string */
#define OPT_GOTO  1  /* Go to line # */
#define OPT_BLOCK 1  /* Block selection */
#define OPT_MACRO 1  /* Enable macros */

/* Include main code
   -----------------
*/
#include "te.c"

/* Setup CRT: Used when the editor starts
   --------------------------------------
   void CrtSetup(void)
*/
CrtSetup()
{
	CrtSetupEx();
}

#asm
CrtSetupEx:
	ld  hl,(1)
	inc hl
	inc hl
	inc hl
	ld  de,BiosConst
	ld  bc,9
	ldir
	ret

BiosConst:  jp 0
BiosConin:  jp 0
BiosConout: jp 0
#endasm

/* Reset CRT: Used when the editor exits
   -------------------------------------
   void CrtReset(void)
*/
CrtReset()
{
}

/* Output character to the CRT
   ---------------------------
   All program output is done with this function.

   On '\n' outputs '\n' + '\r'.

   void CrtOut(int ch)
*/
#asm
CrtOut:
	ld   c,l
	ld   a,l
	cp   10
	jp   nz,BiosConout
	call BiosConout
	ld   c,13
	jp   BiosConout
#endasm

/* Input character from the keyboard
   ---------------------------------
   All program input is done with this function.

   Translate WordStar key sequences to TE key codes.

   int CrtIn(void)
*/
CrtIn()
{
	int ch;

	switch(ch = CrtInEx()) {
		case DEL :   /* DEL == CTL_H */
			return CTL_H;
		case CTL_N : /* ^N == ^M */
			return CTL_M;
	}
	
	return ch;
}

#asm
CrtInEx:
	call BiosConin
	ld h,0
	ld l,a
	ret
#endasm

/* Clear screen and send cursor to 0,0
   -----------------------------------
   void CrtClear(void)
*/
CrtClear()
{
	CrtOut(30);              /* Cursor to 0,0 */
	CrtOut(27); CrtOut('*'); /* Clear CRT */
}

/* Locate the cursor (HOME is 0,0)
   -------------------------------
   void CrtLocate(int row, int col)
*/
CrtLocate(row, col)
int row, col;
{
	CrtOut(27); CrtOut('='); CrtOut(row + 32); CrtOut(col + 32);
}

/* Erase line and cursor to row,0
   ------------------------------
   void CrtClearLine(int row)
*/
CrtClearLine(row)
int row;
{
	CrtLocate(row, 0); CrtClearEol();
}

/* Erase from the cursor to the end of the line
   --------------------------------------------
*/
CrtClearEol()
{
	CrtOut(27); CrtOut('T');
}

/* Turn on / off reverse video
   ---------------------------
*/
CrtReverse(on)
int on;
{
	CrtOut(27); CrtOut(on ? '(' : ')');
}