![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to cart.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [HATARI the Atari ST Emulator] / hatari / src|
Return to cart.c CVS log | Up to [HATARI the Atari ST Emulator] / hatari / src |
1.1 root 1: /*
1.1.1.4 root 2: Hatari - cart.c
3:
4: This file is distributed under the GNU Public License, version 2 or at
5: your option any later version. Read the file gpl.txt for details.
1.1 root 6:
1.1.1.5 root 7: Cartridge program
1.1 root 8:
1.1.1.7 ! root 9: To load programs into memory, through TOS, we need to intercept GEMDOS so we
! 10: can relocate/execute programs via GEMDOS call $4B (Pexec).
1.1.1.5 root 11: We have some 68000 assembler, located at 0xFA0000 (cartridge memory), which is
12: used as our new GEMDOS handler. This checks if we need to intercept the call.
1.1 root 13:
1.1.1.7 ! root 14: The assembler routine can be found in 'cart_asm.s', and has been converted to
! 15: a byte array and stored in 'Cart_data[]' (see cartData.c).
1.1 root 16: */
1.1.1.7 ! root 17: const char Cart_rcsid[] = "Hatari $Id: cart.c,v 1.14 2006/03/02 09:17:16 thothy Exp $";
1.1 root 18:
19: #include "main.h"
20: #include "cart.h"
1.1.1.4 root 21: #include "configuration.h"
22: #include "file.h"
1.1.1.7 ! root 23: #include "log.h"
1.1 root 24: #include "stMemory.h"
1.1.1.4 root 25: #include "vdi.h"
1.1 root 26:
1.1.1.5 root 27: #include "cartData.c"
1.1 root 28:
29:
1.1.1.7 ! root 30: /* Possible cartridge file extensions to scan for */
! 31: static const char * const psCartNameExts[] =
! 32: {
! 33: ".img",
! 34: ".rom",
! 35: ".stc",
! 36: NULL
! 37: };
! 38:
! 39:
1.1 root 40: /*-----------------------------------------------------------------------*/
41: /*
1.1.1.7 ! root 42: Load an external cartridge image file.
1.1 root 43: */
1.1.1.7 ! root 44: static void Cart_LoadImage(void)
1.1 root 45: {
1.1.1.7 ! root 46: Uint8 *pCartData;
! 47: long nCartSize;
1.1.1.4 root 48: char *pCartFileName = ConfigureParams.Rom.szCartridgeImageFileName;
49:
1.1.1.7 ! root 50: /* Try to load the image file: */
! 51: pCartData = File_Read(pCartFileName, NULL, &nCartSize, psCartNameExts);
! 52: if (!pCartData)
! 53: {
! 54: Log_Printf(LOG_ERROR, "Failed to load '%s'.\n", pCartFileName);
! 55: return;
! 56: }
! 57:
! 58: if (nCartSize < 40 || (nCartSize > 0x20000 && nCartSize != 0x20004))
! 59: {
! 60: Log_Printf(LOG_ERROR, "Cartridge file '%s' has illegal size.\n", pCartFileName);
! 61: free(pCartData);
! 62: return;
! 63: }
! 64:
! 65: /* There are two type of cartridge images, normal 1:1 images which are
! 66: * always smaller than or equal to 0x20000 bytes, and the .STC images,
! 67: * which are always 0x20004 bytes (the first 4 bytes are a dummy header).
! 68: * So if size is 0x20004 bytes we have to skip the first 4 bytes */
! 69: if (nCartSize == 0x20004)
! 70: {
! 71: memcpy(&STRam[0xfa0000], pCartData+4, 0x20000);
! 72: }
! 73: else
! 74: {
! 75: memcpy(&STRam[0xfa0000], pCartData, nCartSize);
! 76: }
! 77:
! 78: free(pCartData);
! 79: }
! 80:
! 81:
! 82: /*-----------------------------------------------------------------------*/
! 83: /*
! 84: Copy ST GEMDOS intercept program image into cartridge memory space
! 85: or load an external cartridge file.
! 86: The intercept program is part of Hatari and used as an interface to the host
! 87: file system through GemDOS. It is also needed for Line-A-Init when using
! 88: extended VDI resolutions.
! 89: */
! 90: void Cart_ResetImage(void)
! 91: {
1.1.1.4 root 92: /* "Clear" cartridge ROM space */
93: memset(&STRam[0xfa0000], 0xff, 0x20000);
94:
1.1.1.7 ! root 95: /* Print a warning if user tries to use an external cartridge file
! 96: * together with GEMDOS HD emulation or extended VDI resolution: */
! 97: if (strlen(ConfigureParams.Rom.szCartridgeImageFileName) > 0)
! 98: {
! 99: if (bUseVDIRes)
! 100: Log_Printf(LOG_WARN, "Cartridge can't be used together with extended VDI resolution!\n");
! 101: if (ConfigureParams.HardDisk.bUseHardDiskDirectories)
! 102: Log_Printf(LOG_WARN, "Cartridge can't be used together with GEMDOS hard disk emulation!\n");
! 103: }
! 104:
! 105: /* Use internal cartridge when user wants extended VDI resolution or GEMDOS HD. */
1.1.1.6 root 106: if (bUseVDIRes || ConfigureParams.HardDisk.bUseHardDiskDirectories)
1.1.1.4 root 107: {
1.1.1.7 ! root 108: /* Copy built-in cartrige data into the cartridge memory of the ST */
1.1.1.5 root 109: memcpy(&STRam[0xfa0000], Cart_data, sizeof(Cart_data));
1.1.1.4 root 110: }
1.1.1.7 ! root 111: else if (strlen(ConfigureParams.Rom.szCartridgeImageFileName) > 0)
1.1.1.4 root 112: {
1.1.1.7 ! root 113: /* Load external image file: */
! 114: Cart_LoadImage();
1.1.1.4 root 115: }
1.1 root 116: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.