| Rev | Line | |
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| [1] | 1 | #include "screen.h" |
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| 2 | #include <cpu-io.h> |
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| 3 | |
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| 4 | void scrollup(unsigned int n) |
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| 5 | { |
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| 6 | unsigned char *video, *tmp; |
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| 7 | |
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| 8 | for(video = (unsigned char *) RAMSCREEN; video < (unsigned char *) SCREENLIM; video += 2) |
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| 9 | { |
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| 10 | tmp = (unsigned char *) (video + n * 160); |
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| 11 | |
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| 12 | if(tmp < (unsigned char *) SCREENLIM) |
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| 13 | { |
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| 14 | *video = *tmp; |
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| 15 | *(video + 1) = *(tmp + 1); |
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| 16 | } else |
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| 17 | { |
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| 18 | *video = 0; |
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| 19 | *(video + 1) = 0x07; |
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| 20 | } |
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| 21 | } |
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| 22 | |
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| 23 | kY -= n; |
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| 24 | |
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| 25 | if(kY < 0) |
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| 26 | kY = 0; |
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| 27 | } |
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| 28 | |
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| 29 | void putcar(uint8_t c) |
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| 30 | { |
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| 31 | unsigned char *video; |
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| 32 | |
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| 33 | if(c == 10) /* CR-NL */ |
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| 34 | { |
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| 35 | kX = 0; |
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| 36 | kY++; |
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| 37 | } |
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| 38 | else if(c == 9) /* TAB */ |
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| 39 | { |
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| 40 | kX = kX + 8 - (kX % 8); |
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| 41 | } |
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| 42 | else if(c == 13) /* CR */ |
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| 43 | { |
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| 44 | kX = 0; |
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| 45 | } |
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| 46 | else |
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| 47 | { |
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| 48 | video = (unsigned char *) (RAMSCREEN + 2 * kX + 160 * kY); |
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| 49 | *video = c; |
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| 50 | *(video + 1) = kattr; |
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| 51 | |
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| 52 | kX++; |
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| 53 | if (kX > 79) |
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| 54 | { |
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| 55 | kX = 0; |
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| 56 | kY++; |
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| 57 | } |
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| 58 | } |
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| 59 | |
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| 60 | if (kY > 24) |
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| 61 | scrollup(kY - 24); |
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| 62 | } |
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| 63 | |
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| 64 | void move_cursor(uint8_t x, uint8_t y) |
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| 65 | { |
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| 66 | uint16_t c_pos; |
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| 67 | |
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| 68 | c_pos = y * 80 + x; |
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| 69 | |
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| 70 | cpu_io_out8(0x3d4, 0x0f); |
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| 71 | cpu_io_out8(0x3d5, (uint8_t) c_pos); |
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| 72 | cpu_io_out8(0x3d4, 0x0e); |
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| 73 | cpu_io_out8(0x3d5, (uint8_t) (c_pos >> 8)); |
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| 74 | } |
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| 75 | |
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| 76 | void show_cursor(void) |
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| 77 | { |
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| 78 | move_cursor(kX, kY); |
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| 79 | } |
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| 80 | |
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| 81 | void hide_cursor(void) |
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| 82 | { |
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| 83 | move_cursor(-1, -1); |
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| 84 | } |
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| 85 | |
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| 86 | void dump (uint8_t* addr, int n) |
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| 87 | { |
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| 88 | char c1, c2; |
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| 89 | char *tab = "0123456789ABCDEF"; |
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| 90 | |
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| 91 | while(n--) { |
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| 92 | c1 = tab[(*addr & 0xF0)>>4]; |
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| 93 | c2 = tab[*addr & 0x0F]; |
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| 94 | addr++; |
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| 95 | putcar(c1); |
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| 96 | putcar(c2); |
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| 97 | } |
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| 98 | } |
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