Revision 62
Added by markw over 11 years ago
| atari_drive_emulator.c | ||
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#define MAX_DRIVES 4
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struct SimpleFile * drives[MAX_DRIVES];
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unsigned char drive_info[MAX_DRIVES];
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enum DriveInfo {DI_XD=0,DI_SD=1,DI_MD=2,DI_DD=3,DI_BITS=3,DI_RO=4};
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struct ATRHeader
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{
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| ... | ... | |
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{
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int read = 0;
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int xfd = 0;
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unsigned char info;
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drives[driveNumber] = 0;
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drive_info[driveNumber] = 0;
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if (!file) return;
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| ... | ... | |
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atr_header.wMagic = 0x296;
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atr_header.wPars = file_size(file)/16;
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atr_header.wSecSize = 0x80;
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atr_header.btFlags = 0;
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atr_header.btFlags |= file_readonly(file);
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}
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else if (atr_header.wMagic == 0xFFFF) // XEX
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{
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| ... | ... | |
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{
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//printf("ATR ");
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offset = 16;
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atr_header.btFlags |= file_readonly(file);
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}
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else
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{
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| ... | ... | |
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return;
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}
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if (atr_header.btFlags&1)
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{
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info |= DI_RO;
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}
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if (atr_header.wSecSize == 0x80)
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{
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/* if (atr_header.wPars>(720*128/16))
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printf("MD ");
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if (atr_header.wPars>(720*128/16))
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info |= DI_MD;
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else
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printf("SD ");*/
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info |= DI_SD;
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}
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else if (atr_header.wSecSize == 0x100)
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{
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//printf("DD ");
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info |= DI_DD;
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}
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else if (atr_header.wSecSize < 0x100)
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{
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//printf("XD ");
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info |= DI_XD;
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}
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else
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{
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| ... | ... | |
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//printf("0\n");
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drives[driveNumber] = file;
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drive_info[driveNumber] = info;
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//printf("appears valid\n");
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}
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| ... | ... | |
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clearAtariSectorBuffer();
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status = 0x10; // Motor on;
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status |= 0x08; // write protected; // no write support yet...
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if (atr_header.btFlags&1)
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{
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status |= 0x08; // write protected; // no write support yet...
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}
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if (atr_header.wSecSize == 0x80) // normal sector size
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{
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if (atr_header.wPars>(720*128/16))
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| ... | ... | |
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//printf("WACK:");
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USART_Transmit_Mode();
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if (file_readonly(file))
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{
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send_NACK();
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USART_Wait_Transmit_Complete();
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USART_Receive_Mode();
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return;
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}
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send_ACK();
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USART_Wait_Transmit_Complete();
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USART_Receive_Mode();
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| ... | ... | |
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printf("%d",check_sum);
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printf(")");*/
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}
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void describe_disk(int driveNumber, char * buffer)
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{
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if (drives[driveNumber]==0)
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{
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buffer[0] = 'N';
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buffer[1] = 'O';
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buffer[2] = 'N';
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buffer[3] = 'E';
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buffer[4] = '\0';
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return;
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}
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//enum DriveInfo {DI_XD=0,DI_SD=1,DI_MD=2,DI_DD=3,DI_BITS=3,DI_RO=4};
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unsigned char info = drive_info[driveNumber];
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buffer[0] = 'R';
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buffer[1] = info&DI_RO ? 'O' : 'W';
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buffer[2] = ' ';
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unsigned char density;
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switch (info&3)
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{
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case DI_XD:
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density = 'X';
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break;
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case DI_SD:
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density = 'S';
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break;
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case DI_MD:
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density = 'M';
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break;
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case DI_DD:
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density = 'D';
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break;
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}
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buffer[3] = density;
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buffer[4] = 'D';
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buffer[5] = '\0';
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}
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Added real-only support. Describe disk image in menu.