diff options
Diffstat (limited to 'programs/subeditor.s')
| -rw-r--r-- | programs/subeditor.s | 65 |
1 files changed, 32 insertions, 33 deletions
diff --git a/programs/subeditor.s b/programs/subeditor.s index 1842b5a..d16915d 100644 --- a/programs/subeditor.s +++ b/programs/subeditor.s @@ -300,7 +300,7 @@ getchar: stb b ; Enable insert mode. pha #1 ; Save the character. phy #2 ; Save the cursor index. - cmp #10 ; Was the character that was typed, a newline? + cmp #'\n' ; Was the character that was typed, a newline? bne getchar_pnt ; No, so just print the character. jsl cmd_cpy ; Yes, so start copying the line to the command buffer. getchar_pnt: @@ -311,7 +311,7 @@ getchar_pnt: getchar_pt1: jsl print_char ; No, so print the character. lda a ; Get the return value. - cmp #10 ; Is the return value, a newline? + cmp #'\n' ; Is the return value, a newline? beq getchar_ln ; Yes, so return 0. jmp getchar_chr ; No, so return 1. reset_row: @@ -449,7 +449,7 @@ print_char: lda a ; Get back the character. cmp #$1B ; Did the user type an escape character? beq esc ; Yes, so go check the escape code. - cmp #10 ; No, but did the user type a newline? + cmp #'\n' ; No, but did the user type a newline? beq nl ; Yes, so handle the newline. cmp #$C ; No, but did the user type Ctrl+L? beq clr_scr ; Yes, so clear the screen. @@ -457,7 +457,7 @@ print_char: beq en_step ; Yes, so enable clock/instruction stepping. cmp #18 ; No, but did the user type Ctrl+R? beq dis_step ; Yes, so disable clock/instruction stepping. - cmp #8 ; No, but did the user type a backspace? + cmp #'\b' ; No, but did the user type a backspace? beq bs ; Yes, so handle the backspace. cmp #$7F ; No, but did they type Delete? beq bs ; Yes, so treat it as a backspace. @@ -571,13 +571,12 @@ nl1: cmp #maxrow ; bcc nl_inc ; jsl scrl_down ; - lda #10 ; - sta a ; - jmp printc_end ; + jmp nl_end ; nl_inc: inc scr_row ; jsl update_pos ; - lda #10 ; +nl_end: + lda #'\n' ; sta a ; jmp printc_end ; @@ -826,14 +825,14 @@ shftesc_end: jmp printc_end ; We are done. isup: - lda c ; No, so load the escape code back into the accumulator. - cmp #$41 ; Did the user press the up arrow key? + lda c ; Load the escape code into the accumulator. + cmp #'A' ; Did the user press the up arrow key? bne isup_done ; No, so we're done. lda scr_row ; Yes, but is the cursor at the top of the screen? beq isup_scrl ; Yes, so check if we need to scroll. isup_2: lda c ; No, so load the escape code back into the accumulator. - cmp #$41 ; Did the user press the up arrow key? + cmp #'A' ; Did the user press the up arrow key? beq up ; Yes, so move the cursor up. jmp isup_done ; No, so we're done isup_scrl: @@ -846,14 +845,14 @@ isup_done: rtl ; End of isup. isdown: - lda c ; No, so load the escape code back into the accumulator. - cmp #$42 ; Did the user press the down arrow key? + lda c ; Load the escape code into the accumulator. + cmp #'B' ; Did the user press the down arrow key? bne isdown_done ; No, so we're done. lda scr_row ; Yes, so start checking the y coordinate of the cursor. cmp #maxrow ; Is the cursor at the bottom of the screen? beq isdown_scrl ; Yes, so scroll down. lda c ; No, so load the escape code back into the accumulator. - cmp #$42 ; Did the user press the down arrow key? + cmp #'B' ; Did the user press the down arrow key? beq down ; Yes, so move the cursor down. jmp isdown_done isdown_scrl: @@ -872,8 +871,8 @@ isdown_done: rtl ; End of isdown. isright: - lda c ; No, so load the escape code back into the accumulator. - cmp #$43 ; Did the user press the right arrow key? + lda c ; Load the escape code into the accumulator. + cmp #'C' ; Did the user press the right arrow key? bne isright_dne ; No, so we're done. lda scr_col ; Yes, so start checking the x coordinate of the cursor. cmp #maxcol ; Is the cursor at the far right of the screen? @@ -910,13 +909,13 @@ isright_dne: rtl ; End of isright. isleft: - lda c ; Get the saved character. - cmp #$43 ; Did the user press right? + lda c ; Load the escape code into the accumulator. + cmp #'C' ; Did the user press right? beq isleft_done ; Yes, so we're done lda scr_col ; No, but is the cursor at the far left of the screen? beq isleft_wrp ; Yes, so start checking if this is a wrapped line. lda c ; No, so load the escape code back into the accumulator. - cmp #$44 ; Did the user press the left arrow key? + cmp #'D' ; Did the user press the left arrow key? beq left ; Yes, so move the cursor left. jmp isleft_done ; No, so we're done. isleft_wrp: @@ -976,7 +975,7 @@ left: isshftup: lda c ; Load the escape code back into the accumulator. - cmp #$41 ; Did the user press the up arrow key? + cmp #'A' ; Did the user press the up arrow key? bne shftup_done ; lda #1 ; sta d ; @@ -988,7 +987,7 @@ shftup_done: isshftdown: lda c ; Load the escape code back into the accumulator. - cmp #$42 ; Did the user press the down arrow key? + cmp #'B' ; Did the user press the down arrow key? bne shftdn_done ; lda #1 ; sta d ; @@ -1023,35 +1022,35 @@ update_pos: tay ; Place the index into the Y register. lda #$1B ; Print an escape character sta scr ; to the screen. - lda #$5B ; Print '[' + lda #'[' ; Print '[' sta scr ; to the screen, and start the escape sequence. jsl getrow ; Start printing the row number to the screen. jsl getcol ; Start printing the column number to the screen. - lda #$48 ; Print 'H' + lda #'H' ; Print 'H' sta scr ; to the screen. rtl ; End of update_pos. getrow: lda scr_row ; Get the cursor's y coordinate. div #10 ; Divide A by 10. - adc #$30 ; Convert it to ascii, and + adc #'0' ; Convert it to ascii, and sta scr ; print to the screen. tba ; Get the remainder. - adc #$30 ; Convert it to ascii, and + adc #'0' ; Convert it to ascii, and sta scr ; print to the screen. rtl ; End of getrow. getcol: - lda #$3B ; Print ';' + lda #';' ; Print ';' sta scr ; to the screen. lda scr_col ; Get the cursor's x coordinate. div #10 ; Divide A by 10. clc - adc #$30 ; Convert it to ascii, and + adc #'0' ; Convert it to ascii, and sta scr ; print to the screen. tba ; Get the remainder. clc - adc #$30 ; Convert it to ascii, and + adc #'0' ; Convert it to ascii, and sta scr ; print to the screen. rtl ; End of getrow. @@ -1060,9 +1059,9 @@ scrl_down: inc scr_end ; Increment the ending line of the screen. lda #$1B ; Print an escape character sta scr ; to the screen. - lda #$5B ; Print '[' + lda #'[' ; Print '[' sta scr ; to the screen, and start the escape sequence. - lda #$54 ; Print 'T' + lda #'T' ; Print 'T' sta scr ; to the screen, and end the escape sequence. lda scr_row ; Get the cursor's line number. pha #1 ; Save it in the stack. @@ -1094,9 +1093,9 @@ scrl_up: dec scr_end ; lda #$1B ; Print an escape character sta scr ; to the screen. - lda #$5B ; Print '[' + lda #'[' ; Print '[' sta scr ; to the screen, and start the escape sequence. - lda #$53 ; Print 'S' + lda #'S' ; Print 'S' sta scr ; to the screen, and end the escape sequence. lda scr_row ; pha #1 ; @@ -1133,7 +1132,7 @@ rdrow_inc2: bcs rdrow_end ; jmp rdrow_st ; rdrow_skip: - lda #$20 ; + lda #' ' ; sta scr ; to the screen. jmp rdrow_inc1 ; rdrow_end: |