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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"
1.1.1.16! root 31: #include "inffile.h"
1.1.1.12 root 32: #include "tos.h"
1.1.1.4 root 33: #include "vdi.h"
1.1.1.8 root 34: #include "hatari-glue.h"
35: #include "newcpu.h"
1.1 root 36:
1.1.1.5 root 37: #include "cartData.c"
1.1 root 38:
39:
1.1.1.7 root 40: /* Possible cartridge file extensions to scan for */
41: static const char * const psCartNameExts[] =
42: {
43: ".img",
44: ".rom",
45: ".stc",
46: NULL
47: };
48:
1.1.1.14 root 49: static int PatchIllegal = false;
50:
1.1.1.7 root 51:
1.1 root 52: /*-----------------------------------------------------------------------*/
1.1.1.8 root 53: /**
54: * Load an external cartridge image file.
55: */
1.1.1.7 root 56: static void Cart_LoadImage(void)
1.1 root 57: {
1.1.1.7 root 58: Uint8 *pCartData;
59: long nCartSize;
1.1.1.4 root 60: char *pCartFileName = ConfigureParams.Rom.szCartridgeImageFileName;
61:
1.1.1.7 root 62: /* Try to load the image file: */
1.1.1.8 root 63: pCartData = File_Read(pCartFileName, &nCartSize, psCartNameExts);
1.1.1.7 root 64: if (!pCartData)
65: {
66: Log_Printf(LOG_ERROR, "Failed to load '%s'.\n", pCartFileName);
67: return;
68: }
69:
70: if (nCartSize < 40 || (nCartSize > 0x20000 && nCartSize != 0x20004))
71: {
72: Log_Printf(LOG_ERROR, "Cartridge file '%s' has illegal size.\n", pCartFileName);
73: free(pCartData);
74: return;
75: }
76:
77: /* There are two type of cartridge images, normal 1:1 images which are
78: * always smaller than or equal to 0x20000 bytes, and the .STC images,
79: * which are always 0x20004 bytes (the first 4 bytes are a dummy header).
80: * So if size is 0x20004 bytes we have to skip the first 4 bytes */
81: if (nCartSize == 0x20004)
82: {
1.1.1.8 root 83: memcpy(&RomMem[0xfa0000], pCartData+4, 0x20000);
1.1.1.7 root 84: }
85: else
86: {
1.1.1.8 root 87: memcpy(&RomMem[0xfa0000], pCartData, nCartSize);
1.1.1.7 root 88: }
89:
90: free(pCartData);
91: }
92:
93:
94: /*-----------------------------------------------------------------------*/
1.1.1.8 root 95: /**
96: * Copy ST GEMDOS intercept program image into cartridge memory space
97: * or load an external cartridge file.
98: * The intercept program is part of Hatari and used as an interface to the host
99: * file system through GemDOS. It is also needed for Line-A-Init when using
100: * extended VDI resolutions.
101: */
1.1.1.7 root 102: void Cart_ResetImage(void)
103: {
1.1.1.4 root 104: /* "Clear" cartridge ROM space */
1.1.1.8 root 105: memset(&RomMem[0xfa0000], 0xff, 0x20000);
1.1.1.4 root 106:
1.1.1.7 root 107: /* Print a warning if user tries to use an external cartridge file
108: * together with GEMDOS HD emulation or extended VDI resolution: */
109: if (strlen(ConfigureParams.Rom.szCartridgeImageFileName) > 0)
110: {
111: if (bUseVDIRes)
112: Log_Printf(LOG_WARN, "Cartridge can't be used together with extended VDI resolution!\n");
113: if (ConfigureParams.HardDisk.bUseHardDiskDirectories)
114: Log_Printf(LOG_WARN, "Cartridge can't be used together with GEMDOS hard disk emulation!\n");
1.1.1.14 root 115: if (LogTraceFlags & (TRACE_OS_GEMDOS | TRACE_OS_BASE | TRACE_OS_VDI | TRACE_OS_AES))
1.1.1.13 root 116: Log_Printf(LOG_WARN, "Cartridge can't be used together with GEMDOS/VDI/AES tracing!\n");
1.1.1.7 root 117: }
118:
1.1.1.13 root 119: /* Use internal cartridge trampoline code when user wants extended VDI
1.1.1.16! root 120: * resolution, use GEMDOS HD emulation / Autostarting, or to trace GEMDOS,
! 121: * VDI or AES (OS_BASE does subset of GEMDOS tracing).
! 122: * But don't use it on TOS 0.00, it does not work there.
! 123: */
1.1.1.15 root 124: PatchIllegal = false; /* By default, don't patch opcodes */
1.1.1.16! root 125: if ((bUseVDIRes || INF_Overriding(AUTOSTART_INTERCEPT) ||
! 126: ConfigureParams.HardDisk.bUseHardDiskDirectories ||
1.1.1.14 root 127: LogTraceFlags & (TRACE_OS_GEMDOS | TRACE_OS_BASE | TRACE_OS_VDI | TRACE_OS_AES))
1.1.1.12 root 128: && TosVersion >= 0x100)
1.1.1.4 root 129: {
1.1.1.12 root 130: /* Copy built-in cartridge data into the cartridge memory of the ST */
1.1.1.9 root 131: memcpy(&RomMem[0xfa0000], Cart_data, sizeof(Cart_data));
1.1.1.11 root 132: PatchIllegal = true;
1.1.1.4 root 133: }
1.1.1.7 root 134: else if (strlen(ConfigureParams.Rom.szCartridgeImageFileName) > 0)
1.1.1.4 root 135: {
1.1.1.7 root 136: /* Load external image file: */
137: Cart_LoadImage();
1.1.1.4 root 138: }
1.1.1.14 root 139: }
140:
1.1.1.8 root 141:
1.1.1.14 root 142: /*-----------------------------------------------------------------------*/
143: /**
144: * Patch the cpu tables to intercept some opcodes used for Gemdos HD
145: * emulation or for NatFeats.
146: * We need to split this from Cart_ResetImage(), as the patches should
147: * be applied after building the cpu opcodes tables.
148: */
149: void Cart_Patch(void)
150: {
1.1.1.11 root 151: if (PatchIllegal == true)
1.1.1.8 root 152: {
153: //fprintf ( stderr ," Cart_ResetImage patch\n" );
154: /* Hatari's specific illegal opcodes for HD emulation */
155: cpufunctbl[GEMDOS_OPCODE] = OpCode_GemDos; /* 0x0008 */
156: cpufunctbl[SYSINIT_OPCODE] = OpCode_SysInit; /* 0x000a */
157: cpufunctbl[VDI_OPCODE] = OpCode_VDI; /* 0x000c */
158: }
159: else
160: {
161: //fprintf ( stderr ," Cart_ResetImage no patch\n" );
162: /* No built-in cartridge loaded : set same handler as 0x4afc (illegal) */
163: cpufunctbl[GEMDOS_OPCODE] = cpufunctbl[ 0x4afc ]; /* 0x0008 */
164: cpufunctbl[SYSINIT_OPCODE] = cpufunctbl[ 0x4afc ]; /* 0x000a */
165: cpufunctbl[VDI_OPCODE] = cpufunctbl[ 0x4afc ]; /* 0x000c */
166: }
1.1.1.12 root 167:
168: /* although these don't need cartridge code, it's better
169: * to configure all illegal opcodes in same place...
170: */
171: if (ConfigureParams.Log.bNatFeats)
172: {
173: /* illegal opcodes for emulators Native Features */
174: cpufunctbl[NATFEAT_ID_OPCODE] = OpCode_NatFeat_ID; /* 0x7300 */
175: cpufunctbl[NATFEAT_CALL_OPCODE] = OpCode_NatFeat_Call; /* 0x7301 */
176: }
177: else
178: {
179: /* No Native Features : set same handler as 0x4afc (illegal) */
180: cpufunctbl[NATFEAT_ID_OPCODE] = cpufunctbl[ 0x4afc ]; /* 0x7300 */
181: cpufunctbl[NATFEAT_CALL_OPCODE] = cpufunctbl[ 0x4afc ]; /* 0x7300 */
182: }
1.1 root 183: }
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