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Annotation of previous/src/dimension/nd_rom.c, revision 1.1

1.1     ! root        1: #include "main.h"
        !             2: #include "configuration.h"
        !             3: #include "m68000.h"
        !             4: #include "sysdeps.h"
        !             5: #include "file.h"
        !             6: #include "dimension.h"
        !             7: #include "nd_mem.h"
        !             8: #include "nd_rom.h"
        !             9: 
        !            10: #if ENABLE_DIMENSION
        !            11: 
        !            12: /* --------- NEXTDIMENSION EEPROM --------- *
        !            13:  *                                          *
        !            14:  *  Intel 28F010 (1024k CMOS Flash Memory)  *
        !            15:  *                                          */
        !            16: 
        !            17: /* NeXTdimension board memory */
        !            18: #define ROM_CMD_READ    0x00
        !            19: #define ROM_CMD_READ_ID 0x90
        !            20: #define ROM_CMD_ERASE   0x20
        !            21: #define ROM_CMD_WRITE   0x40
        !            22: #define ROM_CMD_VERIFY  0x80
        !            23: #define ROM_CMD_RESET   0xFF
        !            24: 
        !            25: #define ROM_ID_MFG      0x89
        !            26: #define ROM_ID_DEV      0xB4
        !            27: 
        !            28: 
        !            29: Uint8 nd_rom_command = 0x00;
        !            30: Uint32 nd_rom_last_addr = 0x00;
        !            31: 
        !            32: Uint8 nd_rom_read(Uint32 addr) {
        !            33:     switch (nd_rom_command) {
        !            34:         case ROM_CMD_READ:
        !            35:             return ND_rom[addr];
        !            36:         case ROM_CMD_READ_ID:
        !            37:             switch (addr) {
        !            38:                 case 0: return ROM_ID_MFG;
        !            39:                 case 1: return ROM_ID_DEV;
        !            40:                 default: return 0;
        !            41:             }
        !            42:         case (ROM_CMD_ERASE|ROM_CMD_VERIFY):
        !            43:             nd_rom_command = ROM_CMD_READ;
        !            44:             return ND_rom[addr];
        !            45:         case (ROM_CMD_WRITE|ROM_CMD_VERIFY):
        !            46:             nd_rom_command = ROM_CMD_READ;
        !            47:             return ND_rom[nd_rom_last_addr];
        !            48:         case ROM_CMD_RESET:
        !            49:         default:
        !            50:             return 0;
        !            51:     }
        !            52: }
        !            53: 
        !            54: void nd_rom_write(Uint32 addr, Uint8 val) {
        !            55:     int i;
        !            56:     
        !            57:     switch (nd_rom_command) {
        !            58:         case ROM_CMD_WRITE:
        !            59:             Log_Printf(LOG_WARN, "[ND] ROM: Writing ROM (addr=%04X, val=%02X)",addr,val);
        !            60:             ND_rom[addr] = val;
        !            61:             nd_rom_last_addr = addr;
        !            62:             nd_rom_command = ROM_CMD_READ;
        !            63:             break;
        !            64:         case ROM_CMD_ERASE:
        !            65:             if (val==ROM_CMD_ERASE) {
        !            66:                 Log_Printf(LOG_WARN, "[ND] ROM: Erasing ROM");
        !            67:                 for (i = 0; i < (128*1024); i++)
        !            68:                     ND_rom[i] = 0xFF;
        !            69:                 break;
        !            70:             } /* else fall through */
        !            71:         default:
        !            72:             Log_Printf(LOG_WARN, "[ND] ROM: Command %02X",val);
        !            73:             nd_rom_command = val;
        !            74:             break;
        !            75:     }
        !            76: }
        !            77: 
        !            78: 
        !            79: /* Load NeXTdimension ROM from file */
        !            80: void nd_rom_load(void) {
        !            81:     FILE* romfile;
        !            82:     
        !            83:     if (!File_Exists(ConfigureParams.Dimension.szRomFileName)) {
        !            84:         Log_Printf(LOG_WARN, "[ND] Error: ROM file does not exist or is not readable");
        !            85:         return;
        !            86:     }
        !            87:     
        !            88:     romfile = File_Open(ConfigureParams.Dimension.szRomFileName, "rb");
        !            89:     
        !            90:     if (romfile==NULL) {
        !            91:         Log_Printf(LOG_WARN, "[ND] Error: Cannot open ROM file");
        !            92:         return;
        !            93:     }
        !            94:     
        !            95:     fread(ND_rom,1, 128 * 1024 ,romfile);
        !            96:     
        !            97:     Log_Printf(LOG_WARN, "[ND] Read ROM from %s",ConfigureParams.Dimension.szRomFileName);
        !            98:     
        !            99:     File_Close(romfile);
        !           100: }
        !           101: 
        !           102: #endif

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