mirror of
https://github.com/bobbimanners/emailler.git
synced 2024-05-28 20:41:33 +00:00
7586cc1651
The commit e1a29ae411 was missing the font file. It sports the VT100 'special graphics and line drawing' glyphs in the chars $60-$7F. However so far the code to make use of them isn't implemented.
1938 lines
46 KiB
ArmAsm
1938 lines
46 KiB
ArmAsm
.feature labels_without_colons
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.feature leading_dot_in_identifiers
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.feature loose_char_term
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.define .asc .byt
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.export vt100_init_terminal = InitTerminal
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.export vt100_exit_terminal = ExitTerminal
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.export vt100_process_inbound_char = ProcIn
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.export vt100_process_outbound_char = ProcOut
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.exportzp vt100_screen_cols = 40
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.exportzp vt100_screen_rows = 25
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.import beep
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.import telnet_close
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.import telnet_send_char
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.import telnet_send_string
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putRS = telnet_send_char
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SendStr = telnet_send_string
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; *************************************
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; * *
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; * C a T e r *
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; * *
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; * Copyright by *
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; * Lars Stollenwerk *
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; * *
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; * 2001 - 2003 *
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; * *
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; * This file is part of CaTer. *
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; * *
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; * CaTer is provided under the terms *
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; * of GNU General Public License. *
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; * *
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; * For more information see the *
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; * README file. *
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; * *
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; *************************************
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; *************************************
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; *
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; * Constant declaration
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; *
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; *************************************
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; --- video RAM ---
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Video = $84 ; $8400 - $87E7
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; --- char ROM ---
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Char = $8800 ; $8800 - $8fff
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; --- colour values ---
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; 0 black 8 orange
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; 1 white 9 brown
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; 2 red a light red
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; 3 cyan b gray 1
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; 4 purple c gray 2
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; 5 green d light green
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; 6 blue e light blue
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; 7 yellow f gray 3
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; --- font type ---
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; vanilla f bold 1
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; underline e 3
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fVa = $0f
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fBo = $01
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fUl = $0e
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fUlBo = $03
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; text background
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bgcolour = $0b ; gray1
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; border colour
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bgocolour = $0c ; gray2
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; -------------------------------------
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; Zeropage Kernal
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;
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; Zeropage from $90 to $ff is used
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; by kernal.
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; Following are the variables accessed
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; by CaTer.
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; -------------------------------------
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; --- reverse mode ---
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; 0 = normal, !0 = revers
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Rvs = $c7
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; --- crsr flag, 0 = on ---
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sCrsrOn = $cc
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; --- crsr blink counter ---
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sCrsrCnt = $cd
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; --- char under crsr ---
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sCrsrChar = $ce
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; --- crsr blink phase ---
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; $00 = normal, $01 = revers
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sCrsrPhase = $cf
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; --- ptr to start of screen line ---
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sLinePtr = $d1
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; --- crsr column ---
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sCol = $d3
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; --- crsr row ---
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sRow = $d6
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; --- ptr to start of colour line ---
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sLineColPtr = $f3
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; -------------------------------------
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; page $02, $03: BASIC and KERNAL
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;
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; Following are the variables accessed
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; by CaTer.
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; -------------------------------------
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; --- colour for writing ---
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sColor = $0286
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; --- colour under crsr ---
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sCrsrCol = $0287
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; --- video addr hibyte ---
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VideoAddr = $0288
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; --- CTRL, SHIFT, C= ---
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; flags indicating pressed
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; contol keys
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; 1 SHIFT, 2 C=, 4 CTRL
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ControlFlags = $028d
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; --- flag for SHIFT + C= ---
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; $80 = lock, no charset switch
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; $00 = free
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ShiftCFlag = $0291
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; *************************************
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; *
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; * Zeropage
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; *
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; *************************************
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.include "zeropage.inc"
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; --- Vector ---
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; four vectors in zeropage for
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; temporary use.
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zVector = ptr1
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yVector = ptr2
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xVector = ptr3
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wVector = ptr4
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; --- vector for PrnScr ---
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; tmp1, tmp2
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vVector = tmp1
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; *************************************
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; *
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; * Variables
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; *
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; *************************************
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.bss
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; --- esc mode ---
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; $00 = normal
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; $0f = esc mode
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; $ff = esc [ mode
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; $f0 = ignore one char
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EMode .res 1
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; --- esc buffer ---
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EBuf .res $100
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; --- esc buffer length ---
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; points on first free position
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EBufL .res 1
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; --- esc parameter ---
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; numeric parameter in esc sequence
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EPar .res 1
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; --- scroll region ---
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SRS .res 1 ; first line number
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SRE .res 1 ; last line number
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; --- ANSI font attributes ---
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; contains three bits
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; bit 0 = reverse
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; bit 1 = bold
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; bit 2 = underline
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; bit 6 = background set
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; bit 7 = foreground set
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Font .res 1
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; foreground
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AFore .res 1
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; background
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ABack .res 1
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; --- crsr save area ---
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; here is crsr info saved with ESC 7
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; and restored from with ESC 8
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SaveF .res 1 ; font
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SaveR .res 1 ; reverse mode
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SaveRow .res 1 ; row
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SaveCol .res 1 ; column
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; --- Linebreak pending ---
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; 0 = not pending, ff = pending
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lbPending .res 1
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; --- crsr invisible ---
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; 0 = visible, !0 = invisible
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civis .res 1
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; --- buffer for addDecDig ---
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mul10buf .res 1
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; *************************************
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; *
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; * Code
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; *
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; *************************************
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.code
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; -------------------------------------
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; init terminal
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;
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; -------------------------------------
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InitTerminal
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jsr InitVar ; memory variables
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jsr InitChar; init font
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jsr InitScr ; init screen
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rts
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; -------------------------------------
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; exit terminal
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;
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; -------------------------------------
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ExitTerminal
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jsr ExitChar; exit font
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jsr ExitScr ; exit screen
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rts
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; *************************************
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; *
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; * imcoming data
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; *
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; *************************************
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; -------------------------------------
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; process incoming data
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;
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; char in Y
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; -------------------------------------
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ProcIn lda EMode ; handle esc mode
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bne PIEsc
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lda atp,y ; ASCII to PETSCII
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beq PIrts ; ignore $00
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cmp #$01 ; something special?
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beq Special
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jsr CPrnChr ; print to screen
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PIrts rts
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; to far for branch
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PIEsc jmp Esc
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; -------------------------------------
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; special incoming char
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;
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; -------------------------------------
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Special tya ; restore char
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; --- CR ---
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cmp #$0d ; CR?
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bne D1
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CR jsr clPending
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ldx sRow ; get row
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ldy #$00 ; set col=0
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jsr CPlot ; set crsr
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rts
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; --- BS ---
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D1 cmp #$08 ; BS?
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bne D2
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BS jsr clPending
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ldy sCol ; get col
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beq D1rts ; stop @ left margin
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dey ; dec column
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ldx sRow ; get row
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jsr CPlot ; set crsr
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D1rts rts
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; --- ESC ---
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D2 cmp #$1b ; esc?
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bne D3
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lda #$0f ; set esc mode
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sta EMode
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rts
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; --- BEL ---
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D3 cmp #$07 ; BEL?
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bne D4
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jsr beep
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rts
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; --- LF ---
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D4 cmp #$0a ; LF?
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bne D5
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LF jsr clPending
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ldx sRow ; crsr line
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cpx SRE ; end scroll region?
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bne D4a ; no -> branch
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jsr CUScrl ; yes -> scroll up
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rts
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D4a cpx #$18 ; end of screen?
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bne D4b ; no -> branch
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rts ; yes -> do nothing
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D4b inx ; next line
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ldy sCol ; get col
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jsr CPlot ; set crsr
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rts
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; --- TAB ---
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D5 cmp #$09 ; TAB?
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bne D6
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; don't clear pending
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; don't set pending
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lda sCol ; crsr col
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and #$f8 ; (col DIV 8) * 8
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clc ; col + 8
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adc #$08
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cmp #$28 ; col=40?
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bne D5a ; no -> skip
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lda #$27 ; yes -> col=39
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D5a tay ; col to y
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ldx sRow ; line to x
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jsr CPlot ; set crsr
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rts
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D6 rts
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; -------------------------------------
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; esc mode
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;
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; char in Y
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; EMode != $00 in A
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; -------------------------------------
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Esc tax ; save EMode
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and #$0f ; EMode = $0f?
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bne E1
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; --- throw mode --- EMode = $f0
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; throw away char
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lda #$00 ; reset EMode
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sta EMode
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rts
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E1 txa ; restore EMode
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and #$f0 ; EMode = $ff?
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beq SEsc ; no -> short Emode
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jmp LEsc ; yes -> long Emode
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; -------------------------------------
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; short esc mode
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;
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; EMode = $0f
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; process first char
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; -------------------------------------
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SEsc tya ; restore char
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; --- [ ---
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cmp #$5b ; [ ?
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bne E2
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lda #$ff ; set esc [ mode
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sta EMode
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rts
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; --- ( ---
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E2 cmp #$28 ; ( ?
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bne E3
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jmp sThrow
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; --- ) ---
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E3 cmp #$29 ; ) ?
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bne E4
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jmp sThrow
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; --- # ---
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E4 cmp #$23 ; # ?
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bne E5
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jmp sThrow
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; --- D --- index
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E5 cmp #$44 ; D ?
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bne E6
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jsr LF ; same as LF
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jmp Eend
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; --- M --- reverse index
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E6 cmp #$4d ; M ?
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bne E7
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jsr clPending
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ldx sRow ; get crsr row
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cpx SRS ; top os scroll reg?
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bne E6a
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jsr CDScrl ; yes -> scroll down
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jmp Eend
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E6a cpx #$00 ; top of screen?
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bne E6b
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jmp Eend ; yes -> do nothing
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E6b dex ; one line up
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ldy sCol ; get crsr col
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jsr CPlot ; set crsr
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jmp Eend
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; --- E --- next line
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E7 cmp #$45 ; E ?
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bne E8
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jsr CR
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jsr LF
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jmp Eend
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; --- 7 --- save crsr
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E8 cmp #$37 ; 7 ?
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bne E9
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lda Font ; save font
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sta SaveF
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lda Rvs ; save reverse mode
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sta SaveR
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ldx sRow ; save position
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ldy sCol
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stx SaveRow
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sty SaveCol
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jmp Eend
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; --- 8 --- restore crsr
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E9 cmp #$38 ; 8 ?
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bne E10
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jsr clPending
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ldx SaveRow ; restore pos
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ldy SaveCol
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jsr CPlot
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lda SaveR ; restore ..
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sta Rvs ; .. reverse mode
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ldx SaveF ; restore font
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stx Font
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lda FontTable,x
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sta sColor ; set colour
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jmp Eend
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; --- unknown ---
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E10
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; --- reset ESC mode ---
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Eend lda #$00 ; reset EMode
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sta EMode
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rts
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; --- set Throw mode ---
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sThrow lda #$f0 ; set esc mode $f0
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sta EMode
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rts
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; -------------------------------------
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; [ esc mode
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;
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; EMode = $ff
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; -------------------------------------
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LEsc tya ; restore char
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ldy EBufL
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sta EBuf,y ; store char
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iny
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sty EBufL ; inc esc buffer
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jsr TestL ; test letter
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bcs LE1 ; process command
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rts
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; --- process esc command ---
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; A = last char
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; Y = EBufL
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; X conunts processed command chars
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LE1 ldx #$00 ; first char
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; --- A --- crsr up
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cmp #$41 ; A ?
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bne LE2
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jsr clPending
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jsr GetNum ; get argument
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lda EPar ; EPar = 0...
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bne LE1c
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inc EPar ; .. means 1
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LE1c lda sRow ; get crsr row
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sec
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sbc EPar ; row = row - up
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cmp SRS ; stop at top of ..
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bpl LE1a ; ..scroll region
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lda SRS
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LE1a tax ; x is row
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ldy sCol ; y is col
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jsr CPlot ; set crsr
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jmp LEend
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; --- B --- crsr down
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LE2 cmp #$42 ; B ?
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bne LE3
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jsr clPending
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jsr GetNum ; get argument
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lda EPar ; EPar = 0...
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bne LE2c
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inc EPar ; .. means 1
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LE2c lda sRow ; get crsr row
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clc
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adc EPar ; row = row + down
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cmp SRE ; outside scrregion?
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bcs LE2d ; yes -> branch
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tax ; x is row
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jmp LE2a
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LE2d ldx SRE ; x = row = SRE
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LE2a ldy sCol ; y is col
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jsr CPlot ; set crsr
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jmp LEend
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; --- C --- crsr right
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LE3 cmp #$43 ; C ?
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bne LE4
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jsr clPending
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jsr GetNum ; get argument
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lda EPar ; EPar = 0...
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bne LE3c
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inc EPar ; .. means 1
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LE3c lda sCol ; get crsr col
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clc
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adc EPar ; col = col + right
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cmp #$27 ; outside screen?
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bcs LE3d ; yes -> branch
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tay
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jmp LE3a
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LE3d ldy #$27 ; y=col=left margin
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LE3a ldx sRow ; x is row
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jsr CPlot ; set crsr
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jmp LEend
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; --- D --- crsr left
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LE4 cmp #$44 ; D ?
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bne LE5
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jsr clPending
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jsr GetNum ; get argument
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lda EPar ; EPar = 0...
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bne LE4c
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inc EPar ; .. means 1
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LE4c lda sCol ; get crsr col
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sec
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sbc EPar ; col = col - left
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bpl LE4a ; stop at left..
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lda #$00 ; ..margin
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LE4a tay ; y is col
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ldx sRow ; x is row
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jsr CPlot ; set crsr
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jmp LEend
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; --- m --- font attributes
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LE5 cmp #$6d ; m ?
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beq LE5a
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jmp LE6 ; too far to branch
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LE5a jsr GetNum
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pha ; save nondigit char
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lda Font ; font to A
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ldy EPar ; parameter to Y
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; -- 0 --
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bne LE5b ; 0 ?
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tya ; set font = vanilla
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jmp LE5nx
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; -- 1 -- bold
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LE5b cpy #$01
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bne LE5c
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ora #$02 ; bit 1 = bold
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jmp LE5nx
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; -- 4 -- underline
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LE5c cpy #$04
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bne LE5d
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ora #$04 ; bit 2 = underline
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jmp LE5nx
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; -- 7 -- reverse
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LE5d cpy #$07
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bne LE5e
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ora #$01 ; bit 0 = reverse
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jmp LE5nx
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LE5e ; -- 30 - 37 --
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cpy #38 ; >= 38?
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bcs LE5g
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cpy #30 ; < 30?
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bcc LE5g
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tya
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sbc #30
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sta AFore
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lda Font
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ora #$80 ; bit 7 = fore
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jmp LE5nx
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LE5g ; -- 40 - 47 --
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cpy #48 ; >= 48?
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bcs LE5nx
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cpy #40 ; < 40?
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bcc LE5nx
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tya
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sbc #40
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sta ABack
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lda Font
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ora #$40 ; bit 6 = back
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LE5nx ; -- next char --
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sta Font
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pla ; get nondigit char
|
|
cmp #$3b ; is semicolon?
|
|
beq LE5a ; then next param
|
|
; -- set colour --
|
|
lda Font
|
|
; set foreground
|
|
bpl LE5h
|
|
ldx AFore
|
|
lda AColTab,x
|
|
; avoid black or white foregr if
|
|
; backgr is given and not black
|
|
tax
|
|
lsr ; 0(blk) or 1(wht)?
|
|
bne LE5j ; no -> keep fore
|
|
bit Font ; back? (bit 6 -> v)
|
|
bvc LE5j ; no -> keep fore
|
|
lda ABack ; back is black?
|
|
bne LE5hh ; no -> take back
|
|
LE5j txa
|
|
; ^^^ end of avoid ^^^
|
|
ldx #$00 ; reverse off
|
|
jmp LE5k
|
|
LE5h ; set background
|
|
bit Font ; bit 6 -> v
|
|
bvc LE5i
|
|
LE5hh ldx ABack
|
|
lda AColTab,x
|
|
ldx #$01 ; reverse on
|
|
jmp LE5k
|
|
LE5i ; set ANSI font attributes
|
|
ldx #$00 ; reverse off
|
|
lsr ; reverse?
|
|
bcc LE5l
|
|
inx ; -> reverse on
|
|
LE5l tay
|
|
lda FontTable,y
|
|
LE5k sta sColor ; set colour
|
|
stx Rvs ; set reverse mode
|
|
jmp LEend
|
|
|
|
FontTable ; bits mean ul bo
|
|
.byt fVa, fBo ; 00 01
|
|
.byt fUl, fUlBo ; 10 11
|
|
|
|
AColTab
|
|
;ANSI 30 31 32 32 34 35 36 37
|
|
; blk red grn ye blu mag cy wh
|
|
.byt 0, 10, 5, 7, 14, 4, 3, 1
|
|
|
|
; --- K --- erase line
|
|
LE6 cmp #$4b ; K ?
|
|
bne LE7
|
|
jsr GetNum ; get parameter
|
|
lda EPar ; in A
|
|
; -- 0 -- crsr to end of line
|
|
bne LE6b
|
|
jsr ErEnLn ; erase end line
|
|
jmp LEend
|
|
; -- 1 -- begin to crsr
|
|
LE6b cmp #$01
|
|
bne LE6d
|
|
jsr ErBeLn ; erase beg line
|
|
jmp LEend
|
|
; -- 2 -- whole line
|
|
LE6d cmp #$02
|
|
bne LE6e ; par undefined
|
|
ldx sRow ; line in X
|
|
jsr ErLn ; erase line
|
|
sta sCrsrChar ; del char ..
|
|
; ..under crsr
|
|
LE6e jmp LEend
|
|
|
|
|
|
; --- f --- same as H
|
|
LE7 cmp #$66
|
|
bne LE8
|
|
jmp LE7a ; same as H
|
|
|
|
; --- H --- cursor position
|
|
LE8 cmp #$48
|
|
bne LE9
|
|
LE7a jsr clPending
|
|
cpy #$01 ; no par means home
|
|
bne LE8a
|
|
; -- home --
|
|
ldx #$00
|
|
ldy #$00
|
|
jsr CPlot ; set crsr
|
|
jmp LEend
|
|
; -- row, col --
|
|
LE8a jsr GetNum
|
|
cmp #$3b ; is ;?
|
|
bne LE8d ; no -> error
|
|
; -- prepare row --
|
|
ldy EPar ; get row
|
|
bne LE8b ; 0 means 1
|
|
iny
|
|
LE8b dey ; line 1 -> line 0
|
|
cpy #$19 ; >= 25?..
|
|
bcs LE8d ; ..error!
|
|
sty xVector ; save row
|
|
; -- prepare col
|
|
jsr GetNum
|
|
ldy EPar ; get col
|
|
bne LE8c ; 0 means 1
|
|
iny
|
|
LE8c dey ; col 1 -> col 0
|
|
cpy #$28 ; >= 40?..
|
|
bcs LE8d ; ..error!
|
|
ldx xVector ; restore row to X
|
|
jsr CPlot ; set crsr
|
|
LE8d jmp LEend
|
|
|
|
; --- J --- erase screen
|
|
LE9 cmp #$4a ; J ?
|
|
bne LE10
|
|
jsr GetNum ; get parameter
|
|
lda EPar ; in A
|
|
; -- 0 -- crsr to end
|
|
bne LE9a
|
|
jsr ErEnLn ; del rest of line
|
|
ldx sRow ; get crsr line
|
|
LE9b inx ; next line
|
|
cpx #$19 ; line 25?
|
|
bcs LE9f ; then end
|
|
txa
|
|
pha ; save X
|
|
jsr ErLn ; erase line
|
|
pla
|
|
tax ; restore X
|
|
jmp LE9b ; next line
|
|
; -- 1 -- beg of screen to crsr
|
|
LE9a cmp #$01
|
|
bne LE9e
|
|
jsr ErBeLn ; del start of ln
|
|
ldx sRow ; get crsr line
|
|
LE9c dex ; previous line
|
|
bmi LE9f ; neg line -> end
|
|
txa
|
|
pha ; save X
|
|
jsr ErLn ; erase line
|
|
pla
|
|
tax ; restore X
|
|
jmp LE9c
|
|
; -- 2 -- del screen
|
|
LE9e cmp #$02 ; unknown?
|
|
bne LE9f ; then ingnore
|
|
ldx #$18 ; start at ln 24
|
|
LE9d txa
|
|
pha ; save X
|
|
jsr ErLn ; erase line
|
|
pla
|
|
tax ; restore X
|
|
dex ; previous line
|
|
bpl LE9d
|
|
LE9f jmp LEend
|
|
|
|
; --- r --- set scroll region
|
|
LE10 cmp #$72 ; r ?
|
|
bne LE11
|
|
; -- prepare top --
|
|
jsr GetNum
|
|
cmp #$3b ; is ;?
|
|
bne LE10e ; no -> error
|
|
ldy EPar ; get top
|
|
dey ; line 1 -> line 0
|
|
cpy #$19 ; >=25?..
|
|
bcs LE10e ; ..error!
|
|
sty xVector ; save top
|
|
; -- prepare bottom --
|
|
jsr GetNum
|
|
ldy EPar ; get bottom
|
|
dey ; line 1 -> line 0
|
|
cpy #$19 ; >=25?..
|
|
bcs LE10e ; ..error!
|
|
sty yVector ; save bottom
|
|
; -- validate lines --
|
|
lda xVector ; restore top
|
|
cmp yVector ; >= bottom?..
|
|
bcs LE10e ; ..error!
|
|
sta SRS ; top -> SRStart
|
|
sty SRE ; bottom -> SREnd
|
|
; -- home crsr
|
|
jsr clPending
|
|
ldx #$00
|
|
ldy #$00
|
|
jsr CPlot
|
|
LE10e jmp LEend
|
|
|
|
; --- l --- set crsr invisible
|
|
LE11 cmp #$6c ; l ?
|
|
bne LE12
|
|
lda EBuf ; first char ..
|
|
cmp #$3f ; .. is '?' ?
|
|
bne LE11a
|
|
inx ; at second char ..
|
|
jsr GetNum
|
|
lda EPar
|
|
cmp #25 ; .. 25 ?
|
|
bne LE11a
|
|
jsr COff ; switch crsr off
|
|
sta civis ; mark invisible
|
|
LE11a jmp LEend
|
|
|
|
; --- h --- set crsr visible
|
|
LE12 cmp #$68 ; h ?
|
|
bne LE13
|
|
lda EBuf ; first char ..
|
|
cmp #$3f ; ... is '?' ?
|
|
bne LE12a
|
|
inx ; at second char ..
|
|
jsr GetNum
|
|
lda EPar
|
|
cmp #25 ; .. 25 ?
|
|
bne LE12a
|
|
lda #$00
|
|
sta civis ; mark visible
|
|
jsr COn ; switch crsr off
|
|
LE12a jmp LEend
|
|
|
|
LE13
|
|
; --- unknown esc seqence ---
|
|
LEend lda #$00
|
|
sta EBufL ; reset esc buffer
|
|
sta EMode ; reset esc mode
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; GetNum - get decimal number from
|
|
; esc sequence
|
|
;
|
|
; params: esc sequence in EBuf
|
|
; first index to process in X
|
|
; affects: A, X, Y
|
|
; return: number in EPar
|
|
; first non digit char in A
|
|
; next index to process in X
|
|
; -------------------------------------
|
|
|
|
GetNum lda #$00 ; init value
|
|
sta EPar
|
|
GN2 lda EBuf,x ; get next char
|
|
inx
|
|
jsr TestD ; digit?
|
|
bcc GN1 ; no -> return
|
|
tay ; digit to Y
|
|
lda EPar
|
|
jsr addDecDig
|
|
sta EPar
|
|
jmp GN2 ; next char
|
|
|
|
GN1 rts
|
|
|
|
; -------------------------------------
|
|
; TestL - Test letter
|
|
;
|
|
; params: char in A
|
|
; affects: none
|
|
; return: c = 1 for letter
|
|
; c = 0 for no letter
|
|
; -------------------------------------
|
|
|
|
TestL cmp #$41 ; smaller then A?
|
|
bcs TL1 ; no -> go on
|
|
rts ; return no letter
|
|
|
|
TL1 cmp #$5b ; smaller then Z+1?
|
|
bcs TL2 ; no -> go on
|
|
sec ; return letter
|
|
rts
|
|
|
|
TL2 cmp #$61 ; smaller then a?
|
|
bcs TL3 ; no -> go on
|
|
rts ; return no letter
|
|
|
|
TL3 cmp #$7b ; smaller then z+1?
|
|
bcs TL4 ; no -> go on
|
|
sec ; return letter
|
|
rts
|
|
|
|
TL4 clc ; return no letter
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; TestD - test digit
|
|
;
|
|
; params: char in A
|
|
; affects: none
|
|
; return: c = 1 for digit
|
|
; c = 0 for no digit
|
|
; -------------------------------------
|
|
|
|
TestD cmp #$30 ; smaller then 0?
|
|
bcs TD1 ; no -> go on
|
|
rts ; return no digit
|
|
|
|
TD1 cmp #$3a ; smaller then 9+1?
|
|
bcs TD2 ; no -> go on
|
|
sec ; return digit
|
|
rts
|
|
|
|
TD2 clc ; return no digit
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; addDecDig - add decimal digit
|
|
;
|
|
; multiply A * 10, add Y
|
|
;
|
|
; param: present number in A
|
|
; new digit in Y (may be ASCII digit)
|
|
; affects: A
|
|
; return: 10 times the number in A + Y
|
|
; c = 1 overflow occured,
|
|
; number invalid
|
|
; c = 0 no overflow
|
|
; -------------------------------------
|
|
|
|
addDecDig
|
|
; --- inc value ---
|
|
; old value * 10
|
|
; 10a = ( 4a + a ) * 2
|
|
sta mul10buf
|
|
clc
|
|
asl ; ( 4a
|
|
bcs aDDigE
|
|
asl
|
|
bcs aDDigE
|
|
adc mul10buf ; + a )
|
|
bcs aDDigE
|
|
asl ; *2
|
|
bcs aDDigE
|
|
sta mul10buf
|
|
; --- add Y ---
|
|
tya
|
|
and #$0f ; digit to val
|
|
adc mul10buf
|
|
|
|
aDDigE rts
|
|
|
|
; *************************************
|
|
; *
|
|
; * outgoing data
|
|
; *
|
|
; *************************************
|
|
|
|
; -------------------------------------
|
|
; process outgoing key
|
|
;
|
|
; params: key in Y
|
|
; -------------------------------------
|
|
|
|
ProcOut
|
|
lda pta,y ; PETSCII to ASCII
|
|
beq POrts ; ignore key
|
|
cmp #$ff
|
|
beq StrKey ; send a string
|
|
cmp #$fe
|
|
beq CmdKey ; command key
|
|
jsr putRS
|
|
POrts rts
|
|
|
|
; -------------------------------------
|
|
; outgoing string
|
|
;
|
|
; params: key in y
|
|
; -------------------------------------
|
|
|
|
ScrsrU .byt $1b, $5b, $41, $00 ; esc [ A
|
|
ScrsrD .byt $1b, $5b, $42, $00 ; esc [ B
|
|
ScrsrR .byt $1b, $5b, $43, $00 ; esc [ C
|
|
ScrsrL .byt $1b, $5b, $44, $00 ; esc [ D
|
|
|
|
StrKey tya ; restore key
|
|
|
|
; --- crsr U ---
|
|
K1 cmp #$91 ; test crsr U
|
|
bne K2
|
|
ldx #<ScrsrU
|
|
ldy #>ScrsrU
|
|
jsr SendStr
|
|
rts
|
|
; --- crsr L ---
|
|
K2 cmp #$9d ; test crsr L
|
|
bne K3
|
|
ldx #<ScrsrL
|
|
ldy #>ScrsrL
|
|
jsr SendStr
|
|
K3 rts
|
|
|
|
; -------------------------------------
|
|
; outgoing command key
|
|
;
|
|
; -------------------------------------
|
|
|
|
CmdKey tya ; restore character
|
|
|
|
; --- crsr R ---
|
|
; --- ^] ---
|
|
; both events send $1d
|
|
cmp #$1d
|
|
bne C0
|
|
lda #$04 ; test control Key
|
|
bit ControlFlags
|
|
beq crsrR ; not pressed
|
|
; control ] is pressed
|
|
tya ; send ^]
|
|
jsr putRS
|
|
rts
|
|
|
|
; crsr R
|
|
crsrR ldx #<ScrsrR
|
|
ldy #>ScrsrR
|
|
jsr SendStr
|
|
rts
|
|
|
|
; --- crsr D ---
|
|
; --- ^Q ---
|
|
; both events send char $11
|
|
C0 cmp #$11 ;^Q / crsr down
|
|
bne C8
|
|
lda #$04 ; test control Key
|
|
bit ControlFlags
|
|
beq crsrD ; not pressed
|
|
; control Q is pressed
|
|
tya ; send ^Q
|
|
jsr putRS
|
|
rts
|
|
|
|
; crsr down is pressed
|
|
crsrD ldx #<ScrsrD
|
|
ldy #>ScrsrD
|
|
jsr SendStr
|
|
rts
|
|
|
|
; --- HOME key ---
|
|
; --- ^S ---
|
|
; both events send char $13
|
|
C8 cmp #$13 ;^S / HOME
|
|
bne C9
|
|
lda #$04 ; test control Key
|
|
bit ControlFlags
|
|
beq C8Home ; not pressed
|
|
; control S is pressed
|
|
tya ; send ^S
|
|
jsr putRS
|
|
rts
|
|
|
|
; send TAB
|
|
C8Home lda #$09
|
|
jsr putRS
|
|
rts
|
|
|
|
; --- HOME key ---
|
|
; --- ^T ---
|
|
; both events send char $14
|
|
C9 cmp #$14 ;^S / DEL
|
|
bne C10
|
|
lda #$04 ; test control Key
|
|
bit ControlFlags
|
|
beq C9Del ; not pressed
|
|
; control T is pressed
|
|
tya ; send ^T
|
|
jsr putRS
|
|
rts
|
|
|
|
; send TAB
|
|
C9Del lda #$08
|
|
jsr putRS
|
|
rts
|
|
|
|
; --- C=Q ---
|
|
; quit CaTer
|
|
C10 cmp #$ab ; C=Q
|
|
bne C12
|
|
jsr telnet_close
|
|
rts
|
|
|
|
; --- unknown C=-Key ---
|
|
C12 rts
|
|
|
|
; *************************************
|
|
; *
|
|
; * screen handling
|
|
; *
|
|
; *************************************
|
|
|
|
; Variables controlling the cursor
|
|
;
|
|
; COff
|
|
; Kernal COon Plot
|
|
; sCrsrOn $cc r x
|
|
; sCrsrCnt $cd r/w x
|
|
; sCrsrPhase $cf r/w x
|
|
; sCol $d3 r x
|
|
; sRow $d6 x
|
|
; sLinePtr $d1 r x
|
|
; sLineColPtr $f3 r/w x
|
|
; sCrsrChar $ce r/w x
|
|
; sCrsrCol $0287 r/w x
|
|
; sColor $0286 r
|
|
|
|
; Cursor blink phases:
|
|
; on (sCrsrPhase = $01)
|
|
; char on screen = revers of sCrsrChar
|
|
; color on screen = sColor
|
|
; off (sCrsrPhase = $00)
|
|
; char on screen = sCrsrChar
|
|
; color on screen = sCrsrCol
|
|
|
|
; -------------------------------------
|
|
; COff - switch cursor off
|
|
;
|
|
; affects: none
|
|
;
|
|
; Switch cursor off and restore char.
|
|
; This has to be done before every crsr
|
|
; movement.
|
|
; After movement COn has to be called.
|
|
; -------------------------------------
|
|
|
|
COff pha ; save registers
|
|
tya
|
|
pha
|
|
|
|
lda civis ; invisible?
|
|
bne CO2 ; -> do nothing
|
|
ldy #$02 ; prevent soon..
|
|
sty sCrsrCnt ; ..blink
|
|
sty sCrsrOn ; crsr off
|
|
lda sCrsrPhase ; crsr revers?
|
|
beq CO2 ; no -> return
|
|
dey ; normal phase
|
|
sty sCrsrPhase
|
|
ldy sCol ; get column
|
|
lda sCrsrChar ; restore char
|
|
sta (sLinePtr),y
|
|
lda sCrsrCol ; restore colour
|
|
sta (sLineColPtr),y
|
|
|
|
CO2 pla ; restore registers
|
|
tay
|
|
pla
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; COn - switch crsr on
|
|
;
|
|
; affects: none
|
|
;
|
|
; opposite of COff
|
|
; -------------------------------------
|
|
|
|
COn pha
|
|
tya
|
|
pha
|
|
|
|
lda civis ; invisible?
|
|
bne COn1 ; -> do nothing
|
|
ldy sCol ; get column
|
|
lda (sLinePtr),y ; save chr
|
|
sta sCrsrChar
|
|
eor #$80 ; reverse char
|
|
sta (sLinePtr),y
|
|
lda (sLineColPtr),y; save colour
|
|
sta sCrsrCol
|
|
lda sColor ; set crsr colour
|
|
sta (sLineColPtr),y
|
|
lda #$14 ; set counter...
|
|
sta sCrsrCnt ; ... to max
|
|
ldy #$01 ; set rvs phase
|
|
sty sCrsrPhase
|
|
dey ; cursor on
|
|
sty sCrsrOn
|
|
|
|
COn1 pla
|
|
tay
|
|
pla
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; CPlot - move cursor
|
|
;
|
|
; params: coumn in Y
|
|
; line in X
|
|
; affects: A, X, Y
|
|
;
|
|
; The crsr ist turned off during
|
|
; operation (COff - COn)
|
|
; -------------------------------------
|
|
|
|
CPlot jsr COff
|
|
jsr Plot
|
|
jsr COn
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; Plot - move cursor
|
|
;
|
|
; params: coumn in Y
|
|
; line in X
|
|
; affects: A, X, Y
|
|
; -------------------------------------
|
|
|
|
Plot stx sRow ; set row
|
|
sty sCol ; set col
|
|
jsr SLV
|
|
ldx xVector ; set screen line
|
|
ldy xVector+1
|
|
stx sLinePtr
|
|
sty sLinePtr+1
|
|
ldx yVector ; set color line
|
|
ldy yVector+1
|
|
stx sLineColPtr
|
|
sty sLineColPtr+1
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; CPrnChr - print char to screen
|
|
;
|
|
; params: chr in A, $ff means no output
|
|
; affects: A
|
|
; uses: xVector
|
|
;
|
|
; The crsr ist turned off during
|
|
; operation (COff - COn)
|
|
; -------------------------------------
|
|
|
|
CPrnChr jsr COff
|
|
jsr PrnChr
|
|
jsr COn
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; PrnChr - print char (petscii) to screen
|
|
;
|
|
; params: chr in A, $80 means no output
|
|
; affects: A
|
|
; uses: xVector
|
|
;
|
|
; Rem: The char π/~ is read from
|
|
; keyboard as $de but from screen
|
|
; (basic code, via input) as $ff.
|
|
; -------------------------------------
|
|
|
|
PrnChr sta xVector ; save char
|
|
txa ; save registers
|
|
pha
|
|
tya
|
|
pha
|
|
lda xVector ; restore char
|
|
|
|
; PETSCII to ScreenCode (SC)
|
|
; -- $ff -- π/~ from keybd
|
|
cmp #$ff ; warn: reverse
|
|
bne PC_1
|
|
lda #$de
|
|
jmp PCrvs
|
|
; -- $e0-$fe -- upper graphics
|
|
PC_1 cmp #$e0 ; no output
|
|
bcc PC0
|
|
jmp PCend
|
|
; -- $c0-$df -- capital letters
|
|
PC0 cmp #$c0
|
|
bcc PC1
|
|
and #$7f
|
|
jmp PCrvs
|
|
; -- $a0-$bf -- graphics/latin-9
|
|
PC1 cmp #$a0
|
|
bcc PC2
|
|
and #$3f
|
|
ora #$40
|
|
jmp PCrvs
|
|
; -- $80-$9f -- upper control
|
|
PC2 cmp #$80 ; no output
|
|
bcc PC3
|
|
jmp PCend
|
|
; -- $60-$7f -- lower capital
|
|
PC3 cmp #$60 ; for string constants
|
|
bcc PC4
|
|
and #$5f
|
|
jmp PCrvs
|
|
; -- $40-$5f -- small letters
|
|
PC4 cmp #$40
|
|
bcc PC5
|
|
and #$1f
|
|
jmp PCrvs
|
|
; -- $20-$3f -- numbers
|
|
PC5 cmp #$20
|
|
bcc PC6
|
|
jmp PCrvs
|
|
; -- $00-$1f -- lower control
|
|
PC6 jmp PCend ; no output
|
|
|
|
; -- handle reverse mode --
|
|
PCrvs ldx Rvs ; reverse mode?
|
|
beq PCput
|
|
eor #$80 ; reverse char
|
|
|
|
PCput ldx lbPending ; need new line?
|
|
beq PC7 ; no -> skip
|
|
ldx #$00 ; clear pending
|
|
stx lbPending
|
|
jsr NewLn
|
|
PC7 ldy sCol ; get crsr col
|
|
sta (sLinePtr),y; char to screen
|
|
lda sColor ; get colour
|
|
sta (sLineColPtr),y ; set colour
|
|
|
|
; -- move on crsr --
|
|
cpy #$27 ; col = 39?
|
|
bne PC8 ; no -> skip
|
|
lda #$ff ; yes -> set..
|
|
sta lbPending ; ..pending
|
|
jmp PCend
|
|
PC8 iny ; move on crsr
|
|
sty sCol
|
|
|
|
PCend pla ; restore registers
|
|
tay
|
|
pla
|
|
tax
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; NewLn - move crsr to next line
|
|
;
|
|
; affects: X, Y
|
|
;
|
|
; --- INTERNAL ---
|
|
; subtask of PrnChr
|
|
; -------------------------------------
|
|
|
|
NewLn pha ; save char
|
|
ldx sRow ; get crsr row
|
|
cpx SRE ; end of scroll reg?
|
|
beq NL1 ; yes -> branche
|
|
cpx #$18 ; line 24?
|
|
beq NLend ; yes -> crsr stays
|
|
; --- normal wrap ---
|
|
inx ; increase line
|
|
ldy #$00 ; begin of line
|
|
jsr Plot
|
|
jmp NLend
|
|
; --- scroll up ---
|
|
NL1 jsr UScrl
|
|
ldy #$00 ; begin of line
|
|
sty sCol
|
|
NLend pla ; restore char
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; DEL - move crsr to the left and
|
|
; delete char
|
|
;
|
|
; Can move through left margin.
|
|
;
|
|
; affects: A, X, Y
|
|
; -------------------------------------
|
|
|
|
DEL jsr COff
|
|
ldy sCol
|
|
lda lbPending
|
|
beq DEL1
|
|
; pending
|
|
jsr clPending
|
|
jmp DELe
|
|
|
|
DEL1 dey
|
|
bmi DEL2
|
|
; middle of line
|
|
sty sCol
|
|
jmp DELe
|
|
|
|
DEL2 ; first col
|
|
ldx sRow
|
|
beq DELee ; odd: top left corner
|
|
dex
|
|
ldy #39
|
|
jsr Plot
|
|
ldy sCol
|
|
|
|
DELe lda #" " ; clear char
|
|
sta (sLinePtr),y
|
|
DELee jsr COn
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; clPending - clear pending flag
|
|
;
|
|
; affects: none
|
|
;
|
|
; Must be called in all crsr movement
|
|
; commands.
|
|
; -------------------------------------
|
|
|
|
clPending
|
|
pha
|
|
lda #$00
|
|
sta lbPending
|
|
pla
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; CUScrl - scroll up scrollregion
|
|
;
|
|
; affects: A, X, Y
|
|
;
|
|
; The crsr ist turned off during
|
|
; operation (COff - COn)
|
|
; -------------------------------------
|
|
|
|
CUScrl jsr COff
|
|
jsr UScrl
|
|
jsr COn
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; UScrl - scroll up scrollregion
|
|
;
|
|
; affects: A, X, Y
|
|
; uses: xVector, yVector,
|
|
; zVector, wVector
|
|
; -------------------------------------
|
|
|
|
UScrl ldx SRS ; get first line
|
|
; --- scroll one line ---
|
|
US1 ; -- new line: --
|
|
; -- zVector and wVector --
|
|
jsr SLV
|
|
lda xVector ; screen line
|
|
ldy xVector+1
|
|
sta zVector
|
|
sty zVector+1
|
|
lda yVector ; colour line
|
|
ldy yVector+1
|
|
sta wVector
|
|
sty wVector+1
|
|
; -- old line: --
|
|
; -- xVector and yVector
|
|
inx ; old line
|
|
jsr SLV
|
|
; -- copy chars and colours --
|
|
ldy #$27 ; col 39
|
|
US2 lda (xVector),y ; copy char
|
|
sta (zVector),y
|
|
lda (yVector),y ; copy colour
|
|
sta (wVector),y
|
|
dey
|
|
bpl US2
|
|
cpx SRE ; last line?
|
|
bne US1 ; no -> go on
|
|
jsr ErLn_ ; del last line
|
|
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; CDScrl - scroll down scrollregion
|
|
;
|
|
; affects: A, X, Y
|
|
;
|
|
; The crsr ist turned off during
|
|
; operation (COff - COn)
|
|
; -------------------------------------
|
|
|
|
CDScrl jsr COff
|
|
jsr DScrl
|
|
jsr COn
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; DScrl - scroll down scrollregion
|
|
;
|
|
; affects: A, X, Y
|
|
; uses: xVector, yVector,
|
|
; zVector, wVector
|
|
; -------------------------------------
|
|
|
|
DScrl ldx SRE ; get last line
|
|
; --- scroll one line ---
|
|
DS1 ; -- new line: --
|
|
; -- zVector and wVector --
|
|
jsr SLV
|
|
lda xVector ; screen line
|
|
ldy xVector+1
|
|
sta zVector
|
|
sty zVector+1
|
|
lda yVector ; colour line
|
|
ldy yVector+1
|
|
sta wVector
|
|
sty wVector+1
|
|
; -- old line: --
|
|
; -- xVector and yVector
|
|
dex ; old line
|
|
jsr SLV
|
|
; -- copy chars ond colours --
|
|
ldy #$27 ; col 39
|
|
DS2 lda (xVector),y ; copy char
|
|
sta (zVector),y
|
|
lda (yVector),y ; copy colour
|
|
sta (wVector),y
|
|
dey
|
|
bpl DS2
|
|
cpx SRS ; first line?
|
|
bne DS1 ; no -> go on
|
|
jsr ErLn_ ; del first line
|
|
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; ErLn - erase screen line
|
|
;
|
|
; params: line number in X
|
|
; affects: A, X, Y
|
|
; return: $20 (space) in A
|
|
;
|
|
; For internal use:
|
|
; ErLn_ needs line ptr in xVector
|
|
; and line colot ptr in yVector
|
|
; -------------------------------------
|
|
|
|
ErLn jsr SLV ; line start in xVector
|
|
; col start in yVector
|
|
|
|
; -- erase chars --
|
|
ErLn_ ldy #$27 ; col 39
|
|
lda #$20 ; load space
|
|
EL1 sta (xVector),y ; clear char
|
|
dey
|
|
bpl EL1
|
|
|
|
; -- set colour --
|
|
ldy #$27 ; col 39
|
|
lda #fVa ; load vanilla
|
|
EL2 sta (yVector),y ; clear char
|
|
dey
|
|
bpl EL2
|
|
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; ErEnLn - erase to end of line
|
|
;
|
|
; affects: A, X, Y
|
|
;
|
|
; erase screen line from crsr to end of line
|
|
; -------------------------------------
|
|
|
|
ErEnLn
|
|
; -- erase chars --
|
|
ldy sCol ; get crsr col
|
|
lda #$20 ; load space
|
|
EEL1 sta (sLinePtr),y ; clear char
|
|
iny
|
|
cpy #$28 ; pos 40?
|
|
bne EEL1 ; next char
|
|
sta sCrsrChar ; del char ..
|
|
; ..under crsr
|
|
; -- set colour --
|
|
ldy sCol ; get crsr col
|
|
lda #fVa ; load vanilla
|
|
EEL2 sta (sLineColPtr),y ; set colour
|
|
iny
|
|
cpy #$28 ; pos 40?
|
|
bne EEL2 ; next char
|
|
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; ErBeLn - erase from begin of line
|
|
;
|
|
; affects: A, X, Y
|
|
;
|
|
; erase screen line up to crsr
|
|
; -------------------------------------
|
|
|
|
ErBeLn
|
|
; -- erase chars --
|
|
ldy sCol ; get crsr col
|
|
lda #$20 ; load space
|
|
EBL1 sta (sLinePtr),y ; clear char
|
|
dey
|
|
bpl EBL1 ; pos>=0 -> next
|
|
sta sCrsrChar ; del char ..
|
|
; ..under crsr
|
|
; -- set colour --
|
|
ldy sCol ; get crsr col
|
|
lda #fVa ; load vanilla
|
|
EBL2 sta (sLineColPtr),y ; clear char
|
|
dey
|
|
bpl EBL2 ; pos>=0 -> next
|
|
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; SLV - set line vectors
|
|
; --- INTERNAL ---
|
|
;
|
|
; params: line no in X
|
|
; affects: A, Y
|
|
; return: screen line ptr in xVector
|
|
; screen color ptr in yVector
|
|
; -------------------------------------
|
|
|
|
SLV lda $ecf0,x ; get lo byte
|
|
sta xVector
|
|
sta yVector
|
|
; determin hi byte
|
|
ldy #Video ; hi byte
|
|
cpx #$07 ; line < 7?
|
|
bcc SLV1
|
|
iny
|
|
cpx #$0d ; line < 13?
|
|
bcc SLV1
|
|
iny
|
|
cpx #$14 ; line < 20?
|
|
bcc SLV1
|
|
iny ; line 20-24
|
|
SLV1 sty xVector+1
|
|
tya
|
|
clc
|
|
adc #$d8-Video
|
|
sta yVector+1
|
|
|
|
rts
|
|
|
|
; *************************************
|
|
; *
|
|
; * Init routines
|
|
; *
|
|
; *************************************
|
|
|
|
; -------------------------------------
|
|
; init memory
|
|
;
|
|
; -------------------------------------
|
|
|
|
InitVar lda #$00
|
|
sta EMode
|
|
sta EBufL
|
|
sta SRS
|
|
sta Font
|
|
sta SaveF
|
|
sta SaveR
|
|
sta SaveRow
|
|
sta SaveCol
|
|
sta lbPending
|
|
sta civis
|
|
|
|
lda #$18 ; last line
|
|
sta SRE ; = 24
|
|
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; Init char
|
|
;
|
|
; at the end the font is apended.
|
|
; it is copied to $8800 and enabled
|
|
;
|
|
; uses: xVector, yVector, zVector
|
|
; -------------------------------------
|
|
|
|
; begin of reverse chars
|
|
Reverse = Char + $0400
|
|
|
|
InitChar
|
|
; enable font
|
|
sei
|
|
ldx #<FontROM ; Font in zVector
|
|
ldy #>FontROM
|
|
stx zVector
|
|
sty zVector+1
|
|
ldx #<Char ; Char in yVector
|
|
ldy #>Char
|
|
stx yVector
|
|
sty yVector+1
|
|
ldx #<Reverse ; Revrs in xVector
|
|
ldy #>Reverse
|
|
stx xVector
|
|
sty xVector+1
|
|
|
|
; copy font
|
|
ldx #$04 ; copy 4 pages
|
|
ldy #$00
|
|
IC1 lda (zVector),y
|
|
sta (yVector),y
|
|
eor #$ff ; reverse char
|
|
sta (xVector),y
|
|
iny
|
|
bne IC1
|
|
; switch to next page
|
|
inc zVector+1
|
|
inc yVector+1
|
|
inc xVector+1
|
|
dex
|
|
bne IC1
|
|
|
|
; enable font
|
|
lda $dd00
|
|
and #$fc
|
|
ora #$01
|
|
sta $dd00
|
|
lda $d018
|
|
and #$f1
|
|
ora #$02
|
|
sta $d018
|
|
lda #Video
|
|
sta VideoAddr
|
|
cli
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; Exit char
|
|
;
|
|
; -------------------------------------
|
|
|
|
ExitChar
|
|
; disable font
|
|
sei
|
|
lda $dd00
|
|
and #$fc
|
|
ora #$03
|
|
sta $dd00
|
|
lda $d018
|
|
and #$f1
|
|
ora #$04
|
|
sta $d018
|
|
lda #04
|
|
sta VideoAddr
|
|
cli
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; Init Screen
|
|
;
|
|
; -------------------------------------
|
|
|
|
InitScr
|
|
; --- set background ---
|
|
lda #bgocolour
|
|
sta $d020
|
|
lda #bgcolour
|
|
sta $d021
|
|
; --- disable Shift C= ---
|
|
lda #$80
|
|
sta ShiftCFlag
|
|
; --- erase screen ---
|
|
ldx #$18 ; start at ln 24
|
|
IS1 txa
|
|
pha ; save X
|
|
jsr ErLn ; erase line
|
|
pla
|
|
tax ; restore X
|
|
dex ; previous line
|
|
bpl IS1
|
|
lda #fVa ; load vanilla
|
|
sta sColor
|
|
; --- put crsr ---
|
|
ldx #$00
|
|
ldy #$00
|
|
jsr Plot
|
|
|
|
rts
|
|
|
|
; -------------------------------------
|
|
; Exit Screen
|
|
;
|
|
; -------------------------------------
|
|
|
|
ExitScr
|
|
; --- set background ---
|
|
lda #$fe
|
|
sta $d020
|
|
lda #$f6
|
|
sta $d021
|
|
; --- ensable Shift C= ---
|
|
lda #$00
|
|
sta ShiftCFlag
|
|
; --- erase screen ---
|
|
lda #$fe
|
|
sta sColor
|
|
sta sCrsrCol
|
|
jsr $e544
|
|
rts
|
|
|
|
; *************************************
|
|
; *
|
|
; * ASCII and PETSCII tables
|
|
; *
|
|
; *************************************
|
|
|
|
; -------------------------------------
|
|
; table ASCII to PETSCII
|
|
;
|
|
; This tabel is used to convert incoming
|
|
; ASCII chars.
|
|
;
|
|
; pet=$00 means ignore the char
|
|
; pet=$01 do something complicated: C
|
|
; PETSCII and ASCII equal: =
|
|
; PETSCII and ASCII differ: /
|
|
; -------------------------------------
|
|
|
|
atp ;_0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _a _b _c _d _e _f
|
|
|
|
; --- Control chars ------------------------------------------------
|
|
; NUL ACK BEL BS TAB LF CR
|
|
; C C C C C
|
|
.byt $00,$00,$00,$00,$00,$00,$00,$01,$01,$01,$01,$00,$00,$01,$00,$00 ; 0_
|
|
; NAK ESC
|
|
; C
|
|
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$01,$00,$00,$00,$00 ; 1_
|
|
|
|
; --- ASCII = PETSCII ----------------------------------------------
|
|
; ' ' ! " # $ % & ' ( ) * + , - . /
|
|
.byt $20,$21,$22,$23,$24,$25,$26,$27,$28,$29,$2a,$2b,$2c,$2d,$2e,$2f ; 2_
|
|
; 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
|
|
.byt $30,$31,$32,$33,$34,$35,$36,$37,$38,$39,$3a,$3b,$3c,$3d,$3e,$3f ; 3_
|
|
|
|
; --- upper case letters -------------------------------------------
|
|
; @ A B C D E F G H I J K L M N O
|
|
; = / / / / / / / / / / / / / / /
|
|
.byt $40,$c1,$c2,$c3,$c4,$c5,$c6,$c7,$c8,$c9,$ca,$cb,$cc,$cd,$ce,$cf ; 4_
|
|
; P Q R S T U V W X Y Z [ \£ ] ^↑ _←
|
|
; / / / / / / / / / / / = = = = =
|
|
.byt $d0,$d1,$d2,$d3,$d4,$d5,$d6,$d7,$d8,$d9,$da,$5b,$5c,$5d,$5e,$5f ; 5_
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|
|
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; --- lower case letters -------------------------------------------
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; `━ a b c d e f g h i j k l m n o
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; / / / / / / / / / / / / / / / /
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|
.byt $c0,$41,$42,$43,$44,$45,$46,$47,$48,$49,$4a,$4b,$4c,$4d,$4e,$4f ; 6_
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; p q r s t u v w x y z {╋ |▒ }┃ ~▒▒ DEL
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; / / / / / / / / / / / / / / /
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.byt $50,$51,$52,$53,$54,$55,$56,$57,$58,$59,$5a,$db,$dc,$dd,$de,$00 ; 7_
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|
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|
; --- upper control codes ---------------------------------------
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.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; 8_
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.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; 9_
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|
|
|
; --- latin 9 chars ---------------------------------------------
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|
; NBSP £ € (Š) § (š) © « -
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|
.byt $20,$df,$df,$bf,$be,$df,$d3,$b5,$53,$bb,$df,$bc,$df,$2d,$df,$df ; a_
|
|
; ° ± ² ³ (Ž) µ (ž) » Œ œ (Ÿ)
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|
.byt $ba,$b8,$b6,$b7,$da,$b9,$df,$df,$5a,$df,$df,$bd,$b0,$b0,$d9,$df ; b_
|
|
; À (Á) Â (Ã) Ä Å (Ç) È É Ê (Ë) (Ì) (Í) (Î) (Ï)
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|
.byt $a5,$c1,$a4,$c1,$a3,$a4,$df,$c3,$ad,$ab,$ac,$c5,$c9,$c9,$c9,$c9 ; c_
|
|
; (Ð) (Ñ) (Ò) (Ó) Ô (Õ) Ö (Ø) (Ù) (Ú) (Û) Ü (Ý) ß
|
|
.byt $c4,$ce,$cf,$cf,$b1,$cf,$af,$df,$cf,$d5,$d5,$d5,$b3,$d9,$df,$b4 ; d_
|
|
; à (á) â (ã) ä å ç è é ê ë (ì) (í) (î) (ï)
|
|
.byt $a2,$41,$a1,$41,$a0,$a1,$df,$a6,$aa,$a8,$a9,$a7,$49,$49,$49,$49 ; e_
|
|
; (ñ) (ò) (ó) ô (õ) ö (ø) (ù) (ú) (û) ü (ý) (ÿ)
|
|
.byt $df,$4e,$4f,$4f,$b1,$4f,$ae,$df,$4f,$55,$55,$55,$b2,$59,$df,$59 ; f_
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|
; -------------------------------------
|
|
; table PETSCII to ASCII
|
|
;
|
|
; This table is used to prepare keyboard
|
|
; input for sending over the serial
|
|
; line.
|
|
;
|
|
; ascii = $00 means ignore key
|
|
; ascii = $ff menas send string
|
|
; ascii = $fe means do something
|
|
; complicated (command key)
|
|
; -------------------------------------
|
|
|
|
pta ;_0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _a _b _c _d _e _f
|
|
|
|
; --- Control chars ------------------------------------------------
|
|
; {STOP} {RETURN}
|
|
; ^A ^B ^C ^D ^E ^F ^G ^H ^I ^J ^K ^L ^M ^N ^O
|
|
.byt $00,$01,$02,$03,$04,$05,$06,$07,$08,$09,$0a,$0b,$0c,$0d,$0e,$0f ; 0_
|
|
; {crsr↓} {HOME|DEL} {crsr→}
|
|
; ^P ^Q ^R ^S ^T ^U ^V ^W ^X ^Y ^Z ^[ ^\£ ^] ^↑
|
|
.byt $10,$fe,$12,$fe,$fe,$15,$16,$17,$18,$19,$1a,$1b,$1c,$fe,$1e,$1f ; 1_
|
|
|
|
; --- ASCII = PETSCII ----------------------------------------------
|
|
; ' ' ! " # $ % & ' ( ) * + , - . /
|
|
.byt $20,$21,$22,$23,$24,$25,$26,$27,$28,$29,$2a,$2b,$2c,$2d,$2e,$2f ; 2_
|
|
; 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
|
|
.byt $30,$31,$32,$33,$34,$35,$36,$37,$38,$39,$3a,$3b,$3c,$3d,$3e,$3f ; 3_
|
|
|
|
; --- lower case letters -------------------------------------------
|
|
; @ a b c d e f g h i j k l m n o
|
|
; = / / / / / / / / / / / / / / /
|
|
.byt $40,$61,$62,$63,$64,$65,$66,$67,$68,$69,$6a,$6b,$6c,$6d,$6e,$6f ; 4_
|
|
; p q r s t u v w x y z [ \£ ] ^↑ ←
|
|
; / / / / / / / / / / / = = = = ESC
|
|
.byt $70,$71,$72,$73,$74,$75,$76,$77,$78,$79,$7a,$5b,$5c,$5d,$5e,$1b ; 5_
|
|
|
|
; --- mirror of upper letters - should never appear ----------------
|
|
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; 6_
|
|
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; 7_
|
|
|
|
; --- upper control chars ------------------------------------------
|
|
; {f1}{f3}{f5}{f7}{f2}{f4}{f6}{f8}{ShRET}
|
|
;
|
|
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; 8_
|
|
; {crsr↑} {CLR}{INS} {crsr←}
|
|
; DEL
|
|
.byt $00,$ff,$00,$00,$7f,$00,$00,$00,$00,$00,$00,$00,$00,$ff,$00,$00 ; 9_
|
|
|
|
; --- block graphics -----------------------------------------------
|
|
; ShSP C=K C=I C=T C=@ C=G C=+ C=M C=£ Sh£ C=N C=Q C=D C=Z C=S C=P
|
|
; |
|
|
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$7c,$00,$fe,$00,$00,$00,$00 ; a_
|
|
; C=A C=E C=R C=W C=H C=J C=L C=Y C=U C=O Sh@ C=F C=C C=X C=V C=B
|
|
; `
|
|
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$60,$00,$00,$00,$00,$00 ; b_
|
|
|
|
; --- capital letters ----------------------------------------------
|
|
; Sh* A B C D E F G H I J K L M N O
|
|
; _ / / / / / / / / / / / / / / /
|
|
.byt $5f,$41,$42,$43,$44,$45,$46,$47,$48,$49,$4a,$4b,$4c,$4d,$4e,$4f ; c_
|
|
; P Q R S T U V W X Y Z Sh+ C=- Sh- π C=*
|
|
; / / / / / / / / / / / { } ~
|
|
.byt $50,$51,$52,$53,$54,$55,$56,$57,$58,$59,$5a,$7b,$00,$7d,$7e,$00 ; d_
|
|
|
|
; --- mirror of block graphics - should never appear ---------------
|
|
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; e_
|
|
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; f_
|
|
|
|
; --- Font ROM ------------------------
|
|
|
|
FontROM
|
|
.incbin "c64vt100.font"
|