1 | /*
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2 | * Copyright (C) 2017 The Contributors
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3 | *
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4 | * This program is free software: you can redistribute it and/or modify
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5 | * it under the terms of the GNU General Public License as published by
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6 | * the Free Software Foundation, either version 3 of the License, or (at
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7 | * your option) any later version.
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8 | *
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9 | * This program is distributed in the hope that it will be useful, but
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10 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 | * General Public License for more details.
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13 | *
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14 | * A copy of the GNU General Public License can be found in the file
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15 | * "gpl.txt" in the top directory of this repository.
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16 | */
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17 |
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18 | #include <all.h>
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19 |
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20 | #define ver(...) _ver(fdd_verbose, 0, __VA_ARGS__)
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21 | #define ver2(...) _ver(fdd_verbose, 1, __VA_ARGS__)
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22 | #define ver3(...) _ver(fdd_verbose, 2, __VA_ARGS__)
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23 |
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24 | int32_t fdd_verbose = 0;
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25 |
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26 | #define N_CYL 80
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27 | #define N_SID 2
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28 | #define N_SEC 18
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29 | #define SZ_SEC 512
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30 |
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31 | #define SZ_DISK (N_CYL * N_SID * N_SEC * SZ_SEC)
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32 |
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33 | static uint8_t image[SZ_DISK];
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34 |
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35 | void fdd_init(void)
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36 | {
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37 | ver("fdd init");
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38 | inf("loading disk image file %s", disk);
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39 |
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40 | SDL_RWops *ops = SDL_RWFromFile(disk, "rb");
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41 |
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42 | if (ops == NULL) {
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43 | fail("error while opening disk image file %s", disk);
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44 | }
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45 |
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46 | size_t loaded = 0;
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47 |
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48 | while (loaded < SZ_DISK) {
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49 | size_t n_rd = SDL_RWread(ops, image + loaded, 1, SZ_DISK - loaded);
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50 |
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51 | if (n_rd == 0) {
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52 | fail("error while reading disk image file %s", disk);
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53 | }
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54 |
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55 | loaded += n_rd;
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56 | }
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57 |
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58 | SDL_RWclose(ops);
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59 | }
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60 |
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61 | void fdd_quit(void)
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62 | {
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63 | ver("fdd quit");
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64 | }
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65 |
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66 | bool fdd_exec(void)
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67 | {
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68 | ver3("fdd exec");
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69 | return false;
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70 | }
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71 |
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72 | uint32_t fdd_read(uint32_t off, int32_t sz)
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73 | {
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74 | ver2("fdd rd %u:%d", off, sz * 8);
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75 | return 0;
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76 | }
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77 |
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78 | void fdd_write(uint32_t off, int32_t sz, uint32_t val)
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79 | {
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80 | ver2("fdd wr %u:%d 0x%0*x", off, sz * 8, sz * 2, val);
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81 | }
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