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Diffstat (limited to 'trunk/src/emu/cpu/i86/instr286.h')
-rw-r--r--trunk/src/emu/cpu/i86/instr286.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/i86/instr286.h b/trunk/src/emu/cpu/i86/instr286.h
new file mode 100644
index 00000000000..eeb582b67e9
--- /dev/null
+++ b/trunk/src/emu/cpu/i86/instr286.h
@@ -0,0 +1,48 @@
+#define DIVIDE_BY_ZERO 0
+#define SINGLE_STEP 1
+#define NMI 2
+#define BREAK 3
+#define INTO_OVERFLOW 4
+#define BOUND_OVERRUN 5
+#define ILLEGAL_INSTRUCTION 6
+#define FPU_UNAVAILABLE 7
+#define DOUBLE_FAULT 8
+#define FPU_SEG_OVERRUN 9
+#define INVALID_TSS 10
+#define SEG_NOT_PRESENT 11
+#define STACK_FAULT 12
+#define GENERAL_PROTECTION_FAULT 13
+
+#define CPL (cpustate->sregs[CS]&3)
+#define PM (cpustate->msw&1)
+
+static void i80286_trap2(i80286_state *cpustate,UINT32 error);
+static void i80286_interrupt_descriptor(i80286_state *cpustate,UINT16 number, int trap, int error);
+static void i80286_code_descriptor(i80286_state *cpustate,UINT16 selector, UINT16 offset, int gate);
+static void i80286_data_descriptor(i80286_state *cpustate,int reg, UINT16 selector);
+static void PREFIX286(_0fpre)(i80286_state *cpustate);
+static void PREFIX286(_arpl)(i80286_state *cpustate);
+static void PREFIX286(_escape_7)(i8086_state *cpustate);
+static void i80286_pop_seg(i80286_state *cpustate,int reg);
+static void i80286_load_flags(i80286_state *cpustate, UINT16 flags, int cpl);
+
+enum i80286_size
+{
+ I80286_BYTE = 1,
+ I80286_WORD = 2
+};
+
+enum i80286_operation
+{
+ I80286_READ = 1,
+ I80286_WRITE,
+ I80286_EXECUTE
+};
+
+static void i80286_check_permission(i8086_state *cpustate, UINT8 check_seg, UINT32 offset, UINT16 size, i80286_operation operation);
+
+static inline UINT32 GetMemAddr(i80286_state *cpustate, UINT8 seg, UINT32 off, UINT16 size, i80286_operation op) {
+ seg = DefaultSeg(seg);
+ if(PM) i80286_check_permission(cpustate, seg, off, size, op);
+ return (cpustate->base[seg] + off) & AMASK;
+}