| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <unistd.h> |
| 4 | #include <sys/io.h> |
| 5 | #include <signal.h> |
| 6 | |
| 7 | /* |
| 8 | * PC: |
| 9 | * BASE+0 ~ data |
| 10 | * BASE+1 ~ status: BAOSEI?? |
| 11 | * /BUSY, ACK, PE, SLCT, ERROR, IRQ |
| 12 | * BASE+2 ~ control: ??MISIAS |
| 13 | * bidirrectMODE, IRQ_EN, /SLCT_IN, INIT, /AUTO_FD_XT, /STROBE |
| 14 | * |
| 15 | * SEGA |
| 16 | * ?HRL3210 |
| 17 | * TH, TR, TL, D3, D2, D1, D0 |
| 18 | * |
| 19 | * SEGA PC |
| 20 | * 1 D0 <-> 2 D0 |
| 21 | * 2 D1 <-> 3 D1 |
| 22 | * 3 D2 <-> 4 D2 |
| 23 | * 4 D3 <-> 5 D3 |
| 24 | * 5 +5V |
| 25 | * 6 TL <-- 14 /AUTO_FD_XT |
| 26 | * 7 TH --> 10 ACK |
| 27 | * 8 GND --- 21 GND |
| 28 | * 9 TR <-- 17 /SLCT_IN |
| 29 | */ |
| 30 | |
| 31 | static void inthandler(int u) |
| 32 | { |
| 33 | /* switch TL back to high */ |
| 34 | outb(0xe0, 890); |
| 35 | printf("\n"); |
| 36 | exit(1); |
| 37 | } |
| 38 | |
| 39 | int main(int argc, char *argv[]) |
| 40 | { |
| 41 | int size, byte, ret, i; |
| 42 | unsigned char *data; |
| 43 | char *p = NULL; |
| 44 | FILE *file; |
| 45 | |
| 46 | if (argc != 4 || argv[1][0] != '-' || (argv[1][1] != 'r' && argv[1][1] != 'w')) { |
| 47 | printf("usage:\n%s {-r,-w} <file> <size_hex>\n", argv[0]); |
| 48 | return 1; |
| 49 | } |
| 50 | |
| 51 | file = fopen(argv[2], argv[1][1] == 'r' ? "wb" : "rb"); |
| 52 | if (file == NULL) { |
| 53 | fprintf(stderr, "can't open file: %s\n", argv[2]); |
| 54 | return 1; |
| 55 | } |
| 56 | |
| 57 | size = (int)strtoul(argv[3], &p, 16); |
| 58 | if (p == NULL || *p != 0) { |
| 59 | fprintf(stderr, "can't convert size %s\n", argv[3]); |
| 60 | return 1; |
| 61 | } |
| 62 | |
| 63 | data = malloc(size); |
| 64 | if (data == NULL) { |
| 65 | fprintf(stderr, "can't alloc %d bytes\n", size); |
| 66 | return 1; |
| 67 | } |
| 68 | |
| 69 | ret = ioperm(888, 3, 1); |
| 70 | if (ret != 0) { |
| 71 | perror("ioperm"); |
| 72 | return 1; |
| 73 | } |
| 74 | |
| 75 | signal(SIGINT, inthandler); |
| 76 | |
| 77 | printf("regs: %02x %02x %02x\n", inb(888), inb(889), inb(890)); |
| 78 | outb(0xe0, 890); |
| 79 | |
| 80 | while (!(inb(889) & 0x40)) { |
| 81 | printf("waiting for TH..\n"); |
| 82 | sleep(5); |
| 83 | } |
| 84 | |
| 85 | if (argv[1][1] == 'r') |
| 86 | { |
| 87 | for (i = 0; i < size; i++) |
| 88 | { |
| 89 | if ((i & 0xff) == 0) { |
| 90 | printf("\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| 91 | printf("%06x/%06x", i, size); |
| 92 | fflush(stdout); |
| 93 | } |
| 94 | |
| 95 | outb(0xe2, 890); /* TL low */ |
| 96 | |
| 97 | /* wait for TH low */ |
| 98 | while (inb(889) & 0x40) ; |
| 99 | |
| 100 | byte = inb(888) & 0x0f; |
| 101 | |
| 102 | outb(0xe0, 890); /* TL high */ |
| 103 | |
| 104 | /* wait for TH high */ |
| 105 | while (!(inb(889) & 0x40)) ; |
| 106 | |
| 107 | byte |= inb(888) << 4; |
| 108 | data[i] = byte; |
| 109 | } |
| 110 | |
| 111 | fwrite(data, 1, size, file); |
| 112 | } |
| 113 | else |
| 114 | { |
| 115 | ret = fread(data, 1, size, file); |
| 116 | if (ret < size) |
| 117 | printf("warning: read only %d/%d\n", ret, size); |
| 118 | |
| 119 | outb(0xc0, 890); /* out mode, TL hi */ |
| 120 | outb(data[0] & 0x0f, 888); |
| 121 | outb(0xc2, 890); /* out mode, TL low (start condition) */ |
| 122 | |
| 123 | for (i = 0; i < size; i++) |
| 124 | { |
| 125 | if ((i & 0xff) == 0) { |
| 126 | printf("\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| 127 | printf("%06x/%06x", i, size); |
| 128 | fflush(stdout); |
| 129 | } |
| 130 | |
| 131 | /* wait for TH low */ |
| 132 | while (inb(889) & 0x40) ; |
| 133 | |
| 134 | byte = data[i]; |
| 135 | |
| 136 | outb(byte & 0x0f, 888); |
| 137 | outb(0xc2, 890); /* TL low */ |
| 138 | |
| 139 | /* wait for TH high */ |
| 140 | while (!(inb(889) & 0x40)) ; |
| 141 | |
| 142 | outb(byte >> 4, 888); |
| 143 | outb(0xc0, 890); /* TL high */ |
| 144 | } |
| 145 | } |
| 146 | printf("\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| 147 | printf("%06x/%06x\n", i, size); |
| 148 | fclose(file); |
| 149 | |
| 150 | return 0; |
| 151 | } |
| 152 | |