\r
\r
/*\r
- * If this option is enabled, Microsoft ARMASM compatible output is generated.\r
- * Otherwise GNU as syntax is used.\r
+ * If this option is enabled, Microsoft ARMASM compatible output is generated\r
+ * (output file - Cyclone.asm). Otherwise GNU as syntax is used (Cyclone.s).\r
*/\r
-#define USE_MS_SYNTAX 0\r
+#define USE_MS_SYNTAX 0\r
\r
/*\r
* Enable this option if you are going to use Cyclone to emulate Genesis /\r
* Mega Drive system. As VDP chip in these systems had control of the bus,\r
* several instructions were acting differently, for example TAS did'n have\r
* the write-back phase. That will be emulated, if this option is enabled.\r
- * This option also alters timing slightly.\r
*/\r
-#define CYCLONE_FOR_GENESIS 1\r
+#define CYCLONE_FOR_GENESIS 0\r
\r
/*\r
* This option compresses Cyclone's jumptable. Because of this the executable\r
* Warning: if you enable this, you MUST call CycloneInit() before calling\r
* CycloneRun(), or else it will crash.\r
*/\r
-#define COMPRESS_JUMPTABLE 1\r
+#define COMPRESS_JUMPTABLE 1\r
\r
/*\r
* Address mask for memory hadlers. The bits set will be masked out of address\r
* Using 0xff000000 means that only 24 least significant bits should be used.\r
* Set to 0 if you want to mask unused address bits in the memory handlers yourself.\r
*/\r
-#define MEMHANDLERS_ADDR_MASK 0xff000000\r
+#define MEMHANDLERS_ADDR_MASK 0\r
\r
/*\r
* Cyclone keeps the 4 least significant bits of SR, PC+membase and it's cycle\r
- * count in ARM registers instead of the context for performance reasons. If you for\r
+ * counter in ARM registers instead of the context for performance reasons. If you for\r
* any reason need to access them in your memory handlers, enable the options below,\r
* otherwise disable them to improve performance.\r
- * PC value will point to start of instruction currently executed.\r
+ *\r
+ * MEMHANDLERS_NEED_PC updates .pc context field with PC value effective at the time\r
+ * when memhandler was called (opcode address + 2-10 bytes).\r
+ * MEMHANDLERS_NEED_PREV_PC updates .prev_pc context field to currently executed\r
+ * opcode address + 2.\r
+ * Note that .pc and .prev_pc values are always real pointers to memory, so you must\r
+ * subtract .membase to get M68k PC value.\r
+ *\r
* Warning: updating PC in memhandlers is dangerous, as Cyclone may internally\r
* increment the PC before fetching the next instruction and continue executing\r
- * at wrong location.\r
+ * at wrong location. It's better to wait until Cyclone CycloneRun() finishes.\r
+ *\r
+ * Warning: if you enable MEMHANDLERS_CHANGE_CYCLES, you must also enable\r
+ * MEMHANDLERS_NEED_CYCLES, or else Cyclone will keep reloading the same cycle\r
+ * count and this will screw timing (if not cause a deadlock).\r
*/\r
-#define MEMHANDLERS_NEED_PC 0\r
-#define MEMHANDLERS_NEED_FLAGS 0\r
-#define MEMHANDLERS_NEED_CYCLES 1\r
-#define MEMHANDLERS_CHANGE_PC 0\r
-#define MEMHANDLERS_CHANGE_FLAGS 0\r
-#define MEMHANDLERS_CHANGE_CYCLES 0\r
+#define MEMHANDLERS_NEED_PC 0\r
+#define MEMHANDLERS_NEED_PREV_PC 0\r
+#define MEMHANDLERS_NEED_FLAGS 0\r
+#define MEMHANDLERS_NEED_CYCLES 0\r
+#define MEMHANDLERS_CHANGE_PC 0\r
+#define MEMHANDLERS_CHANGE_FLAGS 0\r
+#define MEMHANDLERS_CHANGE_CYCLES 0\r
\r
/*\r
- * If enabled, Cyclone will call IrqCallback routine from it's context whenever it\r
- * acknowledges an IRQ. IRQ level is not cleared automatically, do this in your\r
- * hadler if needed. PC, flags and cycles are valid in the context and can be read.\r
- * If disabled, it simply clears the IRQ level and continues execution.\r
+ * If the following macro is defined, Cyclone no longer calls read*, write*,\r
+ * fetch* and checkpc from it's context, it calls these functions directly\r
+ * instead, prefixed with prefix selected below. For example, if\r
+ * MEMHANDLERS_DIRECT_PREFIX is set to cyclone_, it will call cyclone_read8\r
+ * on byte reads.\r
+ * This is to avoid indirect jumps, which are slower. It also saves one ARM\r
+ * instruction.\r
*/\r
-#define USE_INT_ACK_CALLBACK 1\r
+/* MEMHANDLERS_DIRECT_PREFIX "cyclone_" */\r
\r
/*\r
- * Enable this if you need/change PC, flags or cycles in your IrqCallback function.\r
+ * If enabled, Cyclone will call .IrqCallback routine from it's context whenever it\r
+ * acknowledges an IRQ. IRQ level (.irq) is not cleared automatically, do this in your\r
+ * handler if needed.\r
+ * This function must either return vector number to use for interrupt exception,\r
+ * CYCLONE_INT_ACK_AUTOVECTOR to use autovector (this is the most common case), or\r
+ * CYCLONE_INT_ACK_SPURIOUS (least common case).\r
+ * If disabled, it simply uses appropriate autovector, clears the IRQ level and\r
+ * continues execution.\r
*/\r
-#define INT_ACK_NEEDS_STUFF 0\r
-#define INT_ACK_CHANGES_STUFF 0\r
+#define USE_INT_ACK_CALLBACK 0\r
\r
/*\r
- * If enabled, ResetCallback is called from the context, whenever RESET opcode is\r
+ * Enable this if you need old PC, flags or cycles;\r
+ * or you change cycles in your IrqCallback function.\r
+ */\r
+#define INT_ACK_NEEDS_STUFF 0\r
+#define INT_ACK_CHANGES_CYCLES 0\r
+\r
+/*\r
+ * If enabled, .ResetCallback is called from the context, whenever RESET opcode is\r
* encountered. All context members are valid and can be changed.\r
* If disabled, RESET opcode acts as an NOP.\r
*/\r
-#define USE_RESET_CALLBACK 1\r
+#define USE_RESET_CALLBACK 0\r
\r
/*\r
* If enabled, UnrecognizedCallback is called if an invalid opcode is\r
* If disabled, "Illegal Instruction" exception is generated and execution is\r
* continued.\r
*/\r
-#define USE_UNRECOGNIZED_CALLBACK 1\r
+#define USE_UNRECOGNIZED_CALLBACK 0\r
\r
/*\r
* This option will also call UnrecognizedCallback for a-line and f-line\r
* (0xa*** and 0xf***) opcodes the same way as described above, only appropriate\r
* exceptions will be generated.\r
*/\r
-#define USE_AFLINE_CALLBACK 1\r
+#define USE_AFLINE_CALLBACK 0\r
\r
/*\r
* This makes Cyclone to call checkpc from it's context whenever it changes the PC\r
* by a large value. It takes and should return the PC value in PC+membase form.\r
* The flags and cycle counter are not valid in this function.\r
*/\r
-#define USE_CHECKPC_CALLBACK 1\r
+#define USE_CHECKPC_CALLBACK 1\r
+\r
+/*\r
+ * This determines if checkpc() should be called after jumps when 8 and 16 bit\r
+ * displacement values were used.\r
+ */\r
+#define USE_CHECKPC_OFFSETBITS_16 1\r
+#define USE_CHECKPC_OFFSETBITS_8 0\r
+\r
+/*\r
+ * Call checkpc() after DBcc jumps (which use 16bit displacement). Cyclone prior to\r
+ * 0.0087 never did that.\r
+ */\r
+#define USE_CHECKPC_DBRA 0\r
\r
/*\r
* When this option is enabled Cyclone will do two word writes instead of one\r
- * long write when handling MOVE.L with pre-decrementing destination, as described in\r
- * Bart Trzynadlowski's doc (http://www.trzy.org/files/68knotes.txt).\r
+ * long write when handling MOVE.L or MOVEM.L with pre-decrementing destination,\r
+ * as described in Bart Trzynadlowski's doc (http://www.trzy.org/files/68knotes.txt).\r
* Enable this if you are emulating a 16 bit system.\r
*/\r
-#define SPLIT_MOVEL_PD 1\r
+#define SPLIT_MOVEL_PD 1\r
+\r
+/*\r
+ * Enable emulation of trace mode. Shouldn't cause any performance decrease, so it\r
+ * should be safe to keep this ON.\r
+ */\r
+#define EMULATE_TRACE 1\r
+\r
+/*\r
+ * If enabled, address error exception will be generated if 68k code jumps to an\r
+ * odd address. Causes very small performance hit (2 ARM instructions for every\r
+ * emulated jump/return/exception in normal case).\r
+ * Note: checkpc() must not clear least significant bit of rebased address\r
+ * for this to work, as checks are performed after calling checkpc().\r
+ */\r
+#define EMULATE_ADDRESS_ERRORS_JUMP 1\r
+\r
+/*\r
+ * If enabled, address error exception will be generated if 68k code tries to\r
+ * access a word or longword at an odd address. The performance cost is also 2 ARM\r
+ * instructions per access (for address error checks).\r
+ */\r
+#define EMULATE_ADDRESS_ERRORS_IO 0\r
+\r
+/*\r
+ * If an address error happens during another address error processing,\r
+ * the processor halts until it is reset (catastrophic system failure, as the manual\r
+ * states). This option enables halt emulation.\r
+ * Note that this might be not desired if it is known that emulated system should\r
+ * never reach this state.\r
+ */\r
+#define EMULATE_HALT 0\r
+\r
notaz.gp2x.de / picodrive.git / blobdiff