diff options
| author | Joseph Hunkeler <jhunkeler@gmail.com> | 2018-05-25 21:51:49 -0400 |
|---|---|---|
| committer | Joseph Hunkeler <jhunkeler@gmail.com> | 2018-05-25 21:51:49 -0400 |
| commit | ad1f51c1853f14aa96429c8d53a572769873e1eb (patch) | |
| tree | 6a70fe49778096c83088781a4166214ee8d0736a /console.asm | |
| parent | dfa2e51d2dbebd4e76a2afc67dfbdf3a725b48b5 (diff) | |
| download | minos-ad1f51c1853f14aa96429c8d53a572769873e1eb.tar.gz | |
Formatting
Diffstat (limited to 'console.asm')
| -rw-r--r-- | console.asm | 176 |
1 files changed, 88 insertions, 88 deletions
diff --git a/console.asm b/console.asm index 9212c66..23463e4 100644 --- a/console.asm +++ b/console.asm @@ -70,94 +70,94 @@ console_driver: mov ax, [bp + 4] -.do_fn: -.do_scancode: - cmp al, 00h ; when AL is 00h, check scan-code - jne .do_ascii - - cmp ah, SC_ARROW_LEFT - je .handle_sc_arrow_left - - cmp ah, SC_ARROW_RIGHT - je .handle_sc_arrow_right - - -.handle_sc_arrow_left: - dec dl - jmp .return - -.handle_sc_arrow_right: - inc dl - jmp .return - -.do_ascii: - ; ASCII control block - cmp al, ASCII_SPC - jae .handle_SPC - - cmp al, ASCII_TAB - je .handle_TAB - - cmp al, ASCII_BS - je .handle_BS - - cmp al, ASCII_CR - je .handle_CR - - cmp al, ASCII_LF - je .handle_LF - - ; etc... - jmp .return - - -.handle_SPC: - inc dl - cmp dl, MAX_COLS - jge .handle_LF - jmp .return - -.handle_TAB: - add dl, 4 - jmp .return - -.handle_BS: - dec dl - cmp dl, 0 - jl .skip_bs - - push dx - call setcursor - add sp, 2 - -.skip_bs: - mov ah, 0ah - mov al, 20h - mov bh, byte [video_page] - mov cx, 1 - int 10h - jmp .return_noupdate - -.handle_CR: - mov dl, 0 ; set column zero - jmp .return - -.handle_LF: - inc dh ; increment row - mov dl, 0 ; set column zero - jmp .return - -.return: - push dx - call setcursor - add sp, 2 - -.return_noupdate: - call console_scroll_up - popa - mov sp, bp - pop bp - ret + .do_fn: + .do_scancode: + cmp al, 00h ; when AL is 00h, check scan-code + jne .do_ascii + + cmp ah, SC_ARROW_LEFT + je .handle_sc_arrow_left + + cmp ah, SC_ARROW_RIGHT + je .handle_sc_arrow_right + + + .handle_sc_arrow_left: + dec dl + jmp .return + + .handle_sc_arrow_right: + inc dl + jmp .return + + .do_ascii: + ; ASCII control block + cmp al, ASCII_SPC + jae .handle_SPC + + cmp al, ASCII_TAB + je .handle_TAB + + cmp al, ASCII_BS + je .handle_BS + + cmp al, ASCII_CR + je .handle_CR + + cmp al, ASCII_LF + je .handle_LF + + ; etc... + jmp .return + + + .handle_SPC: + inc dl + cmp dl, MAX_COLS + jge .handle_LF + jmp .return + + .handle_TAB: + add dl, 4 + jmp .return + + .handle_BS: + dec dl + cmp dl, 0 + jl .skip_bs + + push dx + call setcursor + add sp, 2 + + .skip_bs: + mov ah, 0ah + mov al, 20h + mov bh, byte [video_page] + mov cx, 1 + int 10h + jmp .return_noupdate + + .handle_CR: + mov dl, 0 ; set column zero + jmp .return + + .handle_LF: + inc dh ; increment row + mov dl, 0 ; set column zero + jmp .return + + .return: + push dx + call setcursor + add sp, 2 + + .return_noupdate: + call console_scroll_up + popa + mov sp, bp + pop bp + ret cls: |