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1.1 root 1: /*
1.1.1.4 root 2: Hatari - cart.c
3:
1.1.1.12 root 4: This file is distributed under the GNU General Public License, version 2
5: or at 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: */
1.1.1.10 root 17: const char Cart_fileid[] = "Hatari cart.c : " __DATE__ " " __TIME__;
1.1.1.8 root 18:
19: /* 2007/12/09 [NP] Change the function associated to opcodes $8, $a and $c only if hard drive */
20: /* emulation is ON. Else, these opcodes should give illegal instructions (also */
21: /* see uae-cpu/newcpu.c). */
22:
1.1 root 23:
24: #include "main.h"
25: #include "cart.h"
1.1.1.4 root 26: #include "configuration.h"
27: #include "file.h"
1.1.1.7 root 28: #include "log.h"
1.1.1.9 root 29: #include "m68000.h"
1.1 root 30: #include "stMemory.h"
1.1.1.12 root 31: #include "tos.h"
1.1.1.4 root 32: #include "vdi.h"
1.1.1.8 root 33: #include "hatari-glue.h"
34: #include "newcpu.h"
1.1 root 35:
1.1.1.5 root 36: #include "cartData.c"
1.1 root 37:
38:
1.1.1.7 root 39: /* Possible cartridge file extensions to scan for */
40: static const char * const psCartNameExts[] =
41: {
42: ".img",
43: ".rom",
44: ".stc",
45: NULL
46: };
47:
1.1.1.14 root 48: static int PatchIllegal = false;
49:
1.1.1.7 root 50:
1.1 root 51: /*-----------------------------------------------------------------------*/
1.1.1.8 root 52: /**
53: * Load an external cartridge image file.
54: */
1.1.1.7 root 55: static void Cart_LoadImage(void)
1.1 root 56: {
1.1.1.7 root 57: Uint8 *pCartData;
58: long nCartSize;
1.1.1.4 root 59: char *pCartFileName = ConfigureParams.Rom.szCartridgeImageFileName;
60:
1.1.1.7 root 61: /* Try to load the image file: */
1.1.1.8 root 62: pCartData = File_Read(pCartFileName, &nCartSize, psCartNameExts);
1.1.1.7 root 63: if (!pCartData)
64: {
65: Log_Printf(LOG_ERROR, "Failed to load '%s'.\n", pCartFileName);
66: return;
67: }
68:
69: if (nCartSize < 40 || (nCartSize > 0x20000 && nCartSize != 0x20004))
70: {
71: Log_Printf(LOG_ERROR, "Cartridge file '%s' has illegal size.\n", pCartFileName);
72: free(pCartData);
73: return;
74: }
75:
76: /* There are two type of cartridge images, normal 1:1 images which are
77: * always smaller than or equal to 0x20000 bytes, and the .STC images,
78: * which are always 0x20004 bytes (the first 4 bytes are a dummy header).
79: * So if size is 0x20004 bytes we have to skip the first 4 bytes */
80: if (nCartSize == 0x20004)
81: {
1.1.1.8 root 82: memcpy(&RomMem[0xfa0000], pCartData+4, 0x20000);
1.1.1.7 root 83: }
84: else
85: {
1.1.1.8 root 86: memcpy(&RomMem[0xfa0000], pCartData, nCartSize);
1.1.1.7 root 87: }
88:
89: free(pCartData);
90: }
91:
92:
93: /*-----------------------------------------------------------------------*/
1.1.1.8 root 94: /**
95: * Copy ST GEMDOS intercept program image into cartridge memory space
96: * or load an external cartridge file.
97: * The intercept program is part of Hatari and used as an interface to the host
98: * file system through GemDOS. It is also needed for Line-A-Init when using
99: * extended VDI resolutions.
100: */
1.1.1.7 root 101: void Cart_ResetImage(void)
102: {
1.1.1.4 root 103: /* "Clear" cartridge ROM space */
1.1.1.8 root 104: memset(&RomMem[0xfa0000], 0xff, 0x20000);
1.1.1.4 root 105:
1.1.1.7 root 106: /* Print a warning if user tries to use an external cartridge file
107: * together with GEMDOS HD emulation or extended VDI resolution: */
108: if (strlen(ConfigureParams.Rom.szCartridgeImageFileName) > 0)
109: {
110: if (bUseVDIRes)
111: Log_Printf(LOG_WARN, "Cartridge can't be used together with extended VDI resolution!\n");
112: if (ConfigureParams.HardDisk.bUseHardDiskDirectories)
113: Log_Printf(LOG_WARN, "Cartridge can't be used together with GEMDOS hard disk emulation!\n");
1.1.1.14 root 114: if (LogTraceFlags & (TRACE_OS_GEMDOS | TRACE_OS_BASE | TRACE_OS_VDI | TRACE_OS_AES))
1.1.1.13 root 115: Log_Printf(LOG_WARN, "Cartridge can't be used together with GEMDOS/VDI/AES tracing!\n");
1.1.1.7 root 116: }
117:
1.1.1.13 root 118: /* Use internal cartridge trampoline code when user wants extended VDI
119: * resolution, GEMDOS HD emulation or to trace GEMDOS, VDI or AES.
1.1.1.14 root 120: * (OS_BASE does subset of GEMDOS tracing)
1.1.1.13 root 121: * But don't use it on TOS 0.00, it does not work there. */
1.1.1.15! root 122: PatchIllegal = false; /* By default, don't patch opcodes */
1.1.1.13 root 123: if ((bUseVDIRes || ConfigureParams.HardDisk.bUseHardDiskDirectories ||
1.1.1.14 root 124: LogTraceFlags & (TRACE_OS_GEMDOS | TRACE_OS_BASE | TRACE_OS_VDI | TRACE_OS_AES))
1.1.1.12 root 125: && TosVersion >= 0x100)
1.1.1.4 root 126: {
1.1.1.12 root 127: /* Copy built-in cartridge data into the cartridge memory of the ST */
1.1.1.9 root 128: memcpy(&RomMem[0xfa0000], Cart_data, sizeof(Cart_data));
1.1.1.11 root 129: PatchIllegal = true;
1.1.1.4 root 130: }
1.1.1.7 root 131: else if (strlen(ConfigureParams.Rom.szCartridgeImageFileName) > 0)
1.1.1.4 root 132: {
1.1.1.7 root 133: /* Load external image file: */
134: Cart_LoadImage();
1.1.1.4 root 135: }
1.1.1.14 root 136: }
137:
1.1.1.8 root 138:
1.1.1.14 root 139: /*-----------------------------------------------------------------------*/
140: /**
141: * Patch the cpu tables to intercept some opcodes used for Gemdos HD
142: * emulation or for NatFeats.
143: * We need to split this from Cart_ResetImage(), as the patches should
144: * be applied after building the cpu opcodes tables.
145: */
146: void Cart_Patch(void)
147: {
1.1.1.11 root 148: if (PatchIllegal == true)
1.1.1.8 root 149: {
150: //fprintf ( stderr ," Cart_ResetImage patch\n" );
151: /* Hatari's specific illegal opcodes for HD emulation */
152: cpufunctbl[GEMDOS_OPCODE] = OpCode_GemDos; /* 0x0008 */
153: cpufunctbl[SYSINIT_OPCODE] = OpCode_SysInit; /* 0x000a */
154: cpufunctbl[VDI_OPCODE] = OpCode_VDI; /* 0x000c */
155: }
156: else
157: {
158: //fprintf ( stderr ," Cart_ResetImage no patch\n" );
159: /* No built-in cartridge loaded : set same handler as 0x4afc (illegal) */
160: cpufunctbl[GEMDOS_OPCODE] = cpufunctbl[ 0x4afc ]; /* 0x0008 */
161: cpufunctbl[SYSINIT_OPCODE] = cpufunctbl[ 0x4afc ]; /* 0x000a */
162: cpufunctbl[VDI_OPCODE] = cpufunctbl[ 0x4afc ]; /* 0x000c */
163: }
1.1.1.12 root 164:
165: /* although these don't need cartridge code, it's better
166: * to configure all illegal opcodes in same place...
167: */
168: if (ConfigureParams.Log.bNatFeats)
169: {
170: /* illegal opcodes for emulators Native Features */
171: cpufunctbl[NATFEAT_ID_OPCODE] = OpCode_NatFeat_ID; /* 0x7300 */
172: cpufunctbl[NATFEAT_CALL_OPCODE] = OpCode_NatFeat_Call; /* 0x7301 */
173: }
174: else
175: {
176: /* No Native Features : set same handler as 0x4afc (illegal) */
177: cpufunctbl[NATFEAT_ID_OPCODE] = cpufunctbl[ 0x4afc ]; /* 0x7300 */
178: cpufunctbl[NATFEAT_CALL_OPCODE] = cpufunctbl[ 0x4afc ]; /* 0x7300 */
179: }
1.1 root 180: }
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