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

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