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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 44 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
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| 3 | * Date: 1.6.2000 |
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| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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| 5 | * |
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| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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| 7 | * low-level infrastructure for developing OS kernels and Embedded |
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| 8 | * Applications; it partially derives from the HARTIK project but it |
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| 9 | * currently is independently developed. |
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| 10 | * |
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| 11 | * OSLib is distributed under GPL License, and some of its code has |
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| 12 | * been derived from the Linux kernel source; also some important |
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| 13 | * ideas come from studying the DJGPP go32 extender. |
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| 14 | * |
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| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
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| 16 | * D.J. Delorie and all the other developers who believe in the |
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| 17 | * freedom of software and ideas. |
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| 18 | * |
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| 19 | * For legalese, check out the included GPL license. |
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| 20 | */ |
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| 21 | |||
| 22 | /* Console output functions - part 2 */ |
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| 23 | |||
| 24 | #include <ll/i386/hw-data.h> |
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| 25 | #include <ll/i386/hw-instr.h> |
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| 26 | #include <ll/i386/cons.h> |
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| 27 | /* #include <xsys.h>*/ |
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| 28 | #include <ll/i386/string.h> |
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| 29 | #include <ll/i386/stdlib.h> |
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| 30 | #include <ll/i386/stdio.h> |
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| 31 | #include <ll/stdarg.h> |
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| 32 | |||
| 33 | FILE(Cons2); |
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| 34 | |||
| 35 | #define PAGE_SIZE 2048 |
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| 36 | #define PAGE_MAX 8 |
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| 37 | |||
| 38 | /* CGA compatible registers */ |
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| 39 | |||
| 40 | #define CGA_INDEX_REG 0x3D4 |
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| 41 | #define CGA_DATA_REG 0x3D5 |
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| 42 | |||
| 43 | #define VIDEO_ADDRESS_MSB 0x0C |
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| 44 | #define VIDEO_ADDRESS_LSB 0x0D |
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| 45 | |||
| 46 | |||
| 47 | extern int active_page; |
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| 48 | extern int visual_page; |
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| 49 | static int curs_x[PAGE_MAX]; |
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| 50 | static int curs_y[PAGE_MAX]; |
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| 51 | extern BYTE bios_x, bios_y, bios_attr; |
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| 52 | |||
| 53 | /* MG */ |
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| 54 | int cons_columns; /* number of screen columns */ |
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| 55 | int cons_rows; /* number of screen rows */ |
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| 56 | |||
| 57 | void set_visual_page(int page) |
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| 58 | { |
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| 59 | unsigned short page_offset; |
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| 60 | |||
| 61 | page_offset = page * PAGE_SIZE; |
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| 62 | visual_page = page; |
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| 63 | outp(CGA_INDEX_REG, VIDEO_ADDRESS_LSB); |
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| 64 | outp(CGA_DATA_REG, page_offset & 0xFF); |
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| 65 | outp(CGA_INDEX_REG, VIDEO_ADDRESS_MSB); |
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| 66 | outp(CGA_DATA_REG, (page_offset >> 8) & 0xFF); |
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| 67 | } |
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| 68 | |||
| 69 | void set_active_page(int page) |
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| 70 | { |
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| 71 | curs_x[active_page] = bios_x; |
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| 72 | curs_y[active_page] = bios_y; |
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| 73 | bios_x = curs_x[page]; |
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| 74 | bios_y = curs_y[page]; |
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| 75 | active_page = page; |
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| 76 | } |
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| 77 | |||
| 78 | int get_visual_page(void) |
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| 79 | { |
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| 80 | return(visual_page); |
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| 81 | } |
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| 82 | |||
| 83 | int get_active_page(void) |
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| 84 | { |
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| 85 | return(active_page); |
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| 86 | } |
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| 87 | |||
| 88 | void _clear(char c,char attr,int x1,int y1,int x2,int y2) |
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| 89 | { |
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| 90 | register int i,j; |
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| 91 | WORD w = attr; |
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| 92 | |||
| 93 | w <<= 8; w |= c; |
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| 94 | for (i = x1; i <= x2; i++) |
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| 95 | for (j = y1; j <= y2; j++) |
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| 96 | lmempokew((LIN_ADDR)(0xB8000 + 2*i+cons_columns*2*j + 2*active_page*PAGE_SIZE),w); |
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| 97 | place(x1,y1); |
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| 98 | bios_y = y1; |
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| 99 | bios_x = x1; |
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| 100 | } |
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| 101 | |||
| 102 | void clear() |
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| 103 | { |
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| 104 | _clear(' ',bios_attr,0,0,(cons_columns-1),(cons_rows-1)); |
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| 105 | } |
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| 106 | |||
| 107 | void puts_xy(int x,int y,char attr,char *s) |
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| 108 | { |
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| 109 | LIN_ADDR v = (LIN_ADDR)(0xB8000 + (cons_columns*y+x)*2 + active_page*(2*PAGE_SIZE)); |
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| 110 | while (*s != 0) { |
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| 111 | /* REMEMBER! This is a macro! v++ is out to prevent side-effects */ |
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| 112 | lmempokeb(v,*s); s++; v++; |
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| 113 | lmempokeb(v,attr); v++; |
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| 114 | } |
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| 115 | } |
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| 116 | |||
| 117 | void putc_xy(int x,int y,char attr,char c) |
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| 118 | { |
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| 119 | LIN_ADDR v = (LIN_ADDR)(0xB8000 + (cons_columns*y+x)*2 + active_page*(2*PAGE_SIZE)); |
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| 120 | /* REMEMBER! This is a macro! v++ is out to prevent side-effects */ |
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| 121 | lmempokeb(v,c); v++; |
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| 122 | lmempokeb(v,attr); |
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| 123 | } |
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| 124 | |||
| 125 | char getc_xy(int x,int y,char *attr,char *c) |
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| 126 | { |
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| 127 | LIN_ADDR v = (LIN_ADDR)(0xB8000 + (cons_columns*y+x)*2 + active_page*(2*PAGE_SIZE)); |
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| 128 | char r; |
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| 129 | r = lmempeekb(v); v++; |
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| 130 | if (c != NULL) *c = r; |
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| 131 | r = lmempeekb(v); |
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| 132 | if (attr != NULL) *attr = r; |
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| 133 | return(r); |
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| 134 | } |