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-rw-r--r--src/emu/cpu/saturn/sattable.c921
1 files changed, 921 insertions, 0 deletions
diff --git a/src/emu/cpu/saturn/sattable.c b/src/emu/cpu/saturn/sattable.c
new file mode 100644
index 00000000000..3eb06fd986d
--- /dev/null
+++ b/src/emu/cpu/saturn/sattable.c
@@ -0,0 +1,921 @@
+static const int adr_a_begin[]={
+-1, -1, BEGIN_XS, BEGIN_X, BEGIN_S, BEGIN_M, BEGIN_B, BEGIN_W,
+};
+
+static const int adr_a_count[]={
+-1, -1, COUNT_XS, COUNT_X, COUNT_S, COUNT_M, COUNT_B, COUNT_W,
+};
+
+static const int adr_b_begin[]={
+-1, -1, -1, -1, -1, -1, -1, -1,
+-1, -1, BEGIN_XS, BEGIN_X, BEGIN_S, BEGIN_M, BEGIN_B, BEGIN_W,
+};
+
+static const int adr_b_count[]={
+-1, -1, -1, -1, -1, -1, -1, -1,
+-1, -1, COUNT_XS, COUNT_X, COUNT_S, COUNT_M, COUNT_B, COUNT_W,
+};
+
+static const int adr_af_begin[]={
+-1, -1, BEGIN_XS, BEGIN_X, BEGIN_S, BEGIN_M, BEGIN_B, BEGIN_W,
+-1, -1, -1, -1, -1, -1, -1, BEGIN_A
+};
+
+static const int adr_af_count[]={
+-1, -1, COUNT_XS, COUNT_X, COUNT_S, COUNT_M, COUNT_B, COUNT_W,
+-1, -1, -1, -1, -1, -1, -1, COUNT_A
+};
+
+static const int reg_left[]={A,B,C,D,B,C,A,C};
+static const int reg_right[]={B,C,A,C,A,B,C,D};
+static const int add_left[]={ A,B,C,D, 0,0,0,0, B,C,A,C };
+static const int add_right[]={ B,C,A,C, 0,0,0,0, A,B,C,D };
+static const int sub_left[]={A,B,C,D, 0,0,0,0, B,C,A,C, A,B,C,D};
+static const int sub_right[]={B,C,A,C, 0,0,0,0, A,B,C,D, A,B,C,D };
+
+INLINE void saturn_instruction_0e(void)
+{
+ int reg, adr;
+
+ switch(adr=READ_OP()) {
+ case 0:
+ switch(reg=READ_OP()){
+ case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
+ saturn_and(reg_left[reg], saturn.p, 1, reg_right[reg]);
+ break; //A=A&B p
+ case 8: case 9: case 0xa: case 0xb: case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_or(reg_left[reg&7], saturn.p, 1, reg_right[reg&7]);
+ break; //A=A!B p
+ }
+ break;
+ case 1:
+ switch(reg=READ_OP()){
+ case 0: case 1: case 2: case 3:case 4: case 5: case 6: case 7:
+ saturn_and(reg_left[reg], 0, saturn.p+1, reg_right[reg]);
+ break; //A=A&B wp
+ case 8: case 9: case 0xa: case 0xb: case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_or(reg_left[reg&7], 0, saturn.p+1, reg_right[reg&7]);
+ break; //A=A!B wp
+ }
+ break;
+ case 2: case 3: case 4: case 5: case 6: case 7: case 0xf:
+ switch(reg=READ_OP()){
+ case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
+ saturn_and(reg_left[reg], adr_af_begin[adr], adr_af_count[adr], reg_right[reg]);
+ break; //A=A&B xs
+ case 8: case 9: case 0xa: case 0xb: case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_or(reg_left[reg&7], adr_af_begin[adr], adr_af_count[adr], reg_right[reg&7]);
+ break; //A=A!B xs
+ }
+ break;
+ }
+}
+
+static void saturn_instruction_1(void)
+{
+ int reg, adr, oper;
+
+ switch (adr=READ_OP()) {
+ case 0:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_copy(R0+reg, BEGIN_W, COUNT_W, A);
+ break; // r0=a w
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_copy(R0+(reg&7), BEGIN_W, COUNT_W, C);
+ break; // r0=c w
+ }
+ break;
+ case 1:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_copy(A, BEGIN_W, COUNT_W, R0+reg);
+ break; // a=r0 w
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_copy(C, BEGIN_W, COUNT_W, R0+(reg&7));
+ break; // c=r0 w
+ }
+ break;
+ case 2:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_exchange(A, BEGIN_W, COUNT_W, R0+reg);
+ break; // ar0ex w
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_exchange(C, BEGIN_W, COUNT_W, R0+(reg&7));
+ break; // cr0ex w
+ }
+ break;
+ case 3:
+ switch (READ_OP()) {
+ case 0: saturn_reg_to_adr(A,0);break;
+ case 1: saturn_reg_to_adr(A,1);break;
+ case 2: saturn_exchange_adr_reg(0,A);break;
+ case 3: saturn_exchange_adr_reg(1,A);break;
+ case 4: saturn_reg_to_adr(C,0);break;
+ case 5: saturn_reg_to_adr(C,1);break;
+ case 6: saturn_exchange_adr_reg(0,C);break;
+ case 7: saturn_exchange_adr_reg(1,C);break;
+ case 8: saturn_reg_to_adr_word(A,0);break;
+ case 9: saturn_reg_to_adr_word(A,1);break;
+ case 0xa: saturn_exchange_adr_reg_word(0,A);break;
+ case 0xb: saturn_exchange_adr_reg_word(1,A);break;
+ case 0xc: saturn_reg_to_adr_word(C,0);break;
+ case 0xd: saturn_reg_to_adr_word(C,1);break;
+ case 0xe: saturn_exchange_adr_reg_word(0,C);break;
+ case 0xf: saturn_exchange_adr_reg_word(1,C);break;
+ }
+ break;
+ case 4:
+ switch (READ_OP()) {
+ case 0: saturn_store_nibbles(A, BEGIN_A, COUNT_A, 0); break;
+ case 1: saturn_store_nibbles(A, BEGIN_A, COUNT_A, 1); break;
+ case 2: saturn_load_nibbles(A, BEGIN_A, COUNT_A, 0); break;
+ case 3: saturn_load_nibbles(A, BEGIN_A, COUNT_A, 1); break;
+ case 4: saturn_store_nibbles(C, BEGIN_A, COUNT_A, 0); break;
+ case 5: saturn_store_nibbles(C, BEGIN_A, COUNT_A, 1); break;
+ case 6: saturn_load_nibbles(C, BEGIN_A, COUNT_A, 0); break;
+ case 7: saturn_load_nibbles(C, BEGIN_A, COUNT_A, 1); break;
+ case 8: saturn_store_nibbles(A, BEGIN_B, COUNT_B, 0); break;
+ case 9: saturn_store_nibbles(A, BEGIN_B, COUNT_B, 1); break;
+ case 0xa: saturn_load_nibbles(A, BEGIN_B, COUNT_B, 0); break;
+ case 0xb: saturn_load_nibbles(A, BEGIN_B, COUNT_B, 1); break;
+ case 0xc: saturn_store_nibbles(C, BEGIN_B, COUNT_B, 0); break;
+ case 0xd: saturn_store_nibbles(C, BEGIN_B, COUNT_B, 1); break;
+ case 0xe: saturn_load_nibbles(C, BEGIN_B, COUNT_B, 0); break;
+ case 0xf: saturn_load_nibbles(C, BEGIN_B, COUNT_B, 1); break;
+ }
+ break;
+ case 5:
+ switch (oper=READ_OP()) {
+ case 0: case 1: case 4: case 5:
+ switch (adr=READ_OP()) {
+ case 0:
+ saturn_store_nibbles(oper&4?C:A,saturn.p,1,oper&1);
+ break;
+ case 1:
+ saturn_store_nibbles(oper&4?C:A,0,saturn.p+1,oper&1);
+ break;
+ case 2: case 3: case 4: case 5: case 6: case 7:
+ saturn_store_nibbles(oper&4?C:A,adr_a_begin[adr],adr_a_count[adr],oper&1);
+ break;
+ }
+ break;
+ case 2: case 3: case 6: case 7:
+ switch (adr=READ_OP()) {
+ case 0:
+ saturn_load_nibbles(oper&4?C:A,saturn.p,1,oper&1);
+ break;
+ case 1:
+ saturn_load_nibbles(oper&4?C:A,0,saturn.p+1,oper&1);
+ break;
+ case 2: case 3: case 4: case 5: case 6: case 7:
+ saturn_load_nibbles(oper&4?C:A,adr_a_begin[adr],adr_a_count[adr],oper&1);
+ break;
+ }
+ break;
+ case 8: saturn_store_nibbles(A, 0, READ_OP()+1, 0); break;
+ case 9: saturn_store_nibbles(A, 0, READ_OP()+1, 1); break;
+ case 0xa: saturn_load_nibbles(A, 0, READ_OP()+1, 0); break;
+ case 0xb: saturn_load_nibbles(A, 0, READ_OP()+1, 1); break;
+ case 0xc: saturn_store_nibbles(C, 0, READ_OP()+1, 0); break;
+ case 0xd: saturn_store_nibbles(C, 0, READ_OP()+1, 1); break;
+ case 0xe: saturn_load_nibbles(C, 0, READ_OP()+1, 0); break;
+ case 0xf: saturn_load_nibbles(C, 0, READ_OP()+1, 1); break;
+ }
+ break;
+ case 9: saturn_load_adr(0,2);break;
+ case 0xa: saturn_load_adr(0,4);break;
+ case 0xb: saturn_load_adr(0,5);break;
+ case 0xd: saturn_load_adr(1,2);break;
+ case 0xe: saturn_load_adr(1,4);break;
+ case 0xf: saturn_load_adr(1,5);break;
+ case 6: saturn_add_adr(0);break;
+ case 7: saturn_add_adr(1);break;
+ case 8: saturn_sub_adr(0);break;
+ case 0xc: saturn_sub_adr(1);break;
+ }
+}
+
+static void saturn_instruction_80(void)
+{
+ switch(READ_OP()) {
+ case 0: saturn_out_cs();break;
+ case 1: saturn_out_c();break;
+ case 2: saturn_in(A);break;
+ case 3: saturn_in(C);break;
+ case 4: saturn_mem_unconfig();break;
+ case 5: saturn_mem_config();break;
+ case 6: saturn_mem_id();break;
+ case 7: saturn_shutdown();break;
+ case 8:
+ switch(READ_OP()) {
+ case 0: saturn_interrupt_on();break;
+ case 1:
+ switch(READ_OP()) {
+ case 0: saturn_reset_interrupt();break;
+ }
+ break;
+ case 2: saturn_load_reg(A);break; //la
+ case 3: saturn_bus_command_c();break;
+ case 4: saturn_clear_bit(A);break; // abit=0
+ case 5: saturn_set_bit(A);break; // abit=1
+ case 6: saturn_jump_bit_clear(A);break;
+ case 7: saturn_jump_bit_set(A);break;
+ case 8: saturn_clear_bit(C);break; // cbit=0
+ case 9: saturn_set_bit(C);break; // cbit=1
+ case 0xa: saturn_jump_bit_clear(C);break;
+ case 0xb: saturn_jump_bit_set(C);break;
+ case 0xc: saturn_indirect_jump(A);break;
+ case 0xd: saturn_bus_command_d();break;
+ case 0xe: saturn_indirect_jump(C);break;
+ case 0xf: saturn_interrupt_off();break;
+ }
+ break;
+ case 9: saturn_ca_p_1();break;//C+P+1
+ case 0xa: saturn_mem_reset();break;
+ case 0xb: saturn_bus_command_b();break;
+ case 0xc: saturn_p_to_c();break;
+ case 0xd: saturn_c_to_p();break;
+ case 0xe: saturn_serial_request();break;
+ case 0xf: saturn_exchange_p();break;
+ }
+}
+
+static void saturn_instruction_81a(void)
+{
+ int reg, adr;
+ switch(adr=READ_OP()) {
+ case 0:
+ switch(READ_OP()) {
+ case 0:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_copy(R0+reg,saturn.p,1,A);
+ break; //r0=a p
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_copy(R0+(reg&7),saturn.p,1,C);
+ break; //r0=c p
+ }
+ break;
+ case 1:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_copy(A,saturn.p,1,R0+reg);
+ break; //a=r0 p
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_copy(C,saturn.p,1,R0+(reg&7));
+ break; //c=r0 p
+ }
+ break;
+ case 2:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_exchange(A, saturn.p,1,R0+reg);
+ break; // ar0ex p
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_exchange(C, saturn.p,1,R0+(reg&7));
+ break; // cr0ex p
+ }
+ break;
+ }
+ break;
+ case 1:
+ switch(READ_OP()) {
+ case 0:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_copy(R0+reg,0,saturn.p+1,A);
+ break; //r0=a wp
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_copy(R0+(reg&7),0,saturn.p+1,C);
+ break; //r0=c wp
+ }
+ break;
+ case 1:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_copy(A,0,saturn.p+1,R0+reg);
+ break; //a=r0 wp
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_copy(C,0,saturn.p+1,R0+(reg&7));
+ break; //c=r0 wp
+ }
+ break;
+ case 2:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_exchange(A, 0, saturn.p+1, R0+reg);
+ break; // ar0ex wp
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_exchange(C, 0, saturn.p+1, R0+(reg&7));
+ break; // cr0ex wp
+ }
+ break;
+ }
+ break;
+ case 2: case 3: case 4: case 5: case 6: case 7: case 0xf:
+ switch(READ_OP()) {
+ case 0:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_copy(R0+reg,adr_af_begin[adr],adr_af_count[adr],A);
+ break; //r0=a xs
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_copy(R0+(reg&7),adr_af_begin[adr], adr_af_count[adr],C);
+ break; //r0=c xs
+ }
+ break;
+ case 1:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_copy(A,adr_af_begin[adr],adr_af_count[adr],R0+reg);
+ break; //a=r0 xs
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_copy(C,adr_af_begin[adr],adr_af_count[adr],R0+(reg&7));
+ break; //c=r0 xs
+ }
+ break;
+ case 2:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3: case 4:
+ saturn_exchange(A, adr_af_begin[adr], adr_af_count[adr], R0+reg);
+ break; // ar0ex xs
+ case 8: case 9: case 0xa: case 0xb: case 0xc:
+ saturn_exchange(C, adr_af_begin[adr], adr_af_count[adr], R0+(reg&7));
+ break; // cr0ex xs
+ }
+ break;
+ }
+ break;
+ }
+}
+
+static void saturn_instruction_81(void)
+{
+ int reg, adr;
+
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_rotate_nibble_left_w(A+reg); break; // aslc w
+ case 4: case 5: case 6: case 7:
+ saturn_rotate_nibble_right_w(A+(reg&3)); break; // asrc w
+ case 8:
+ switch(adr=READ_OP()) {
+ case 0:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_add_const(A+reg, saturn.p, 1, READ_OP()+1);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_sub_const(A+reg, saturn.p, 1, READ_OP()+1);
+ break;
+ }
+ break;
+ case 1:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_add_const(A+reg, 1, saturn.p+1, READ_OP()+1);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_sub_const(A+reg, 1, saturn.p+1, READ_OP()+1);
+ break;
+ }
+ break;
+ case 2: case 3: case 4: case 5: case 6: case 7: case 0xf:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_add_const(A+reg, adr_af_begin[adr], adr_af_count[adr], READ_OP()+1);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_sub_const(A+reg, adr_af_begin[adr], adr_af_count[adr], READ_OP()+1);
+ break;
+ }
+ break;
+ }
+ break;
+ case 9:
+ switch(adr=READ_OP()) {
+ case 0:
+ switch(reg=READ_OP()){
+ case 0: case 1: case 2: case 3:
+ saturn_shift_right(A+reg,saturn.p,1);
+ break; // asrb p
+ }
+ break;
+ case 1:
+ switch(reg=READ_OP()){
+ case 0: case 1: case 2: case 3:
+ saturn_shift_right(A+reg, 0,saturn.p+1);
+ break; // asrb wp
+ }
+ break;
+ case 2: /*case 3:*/ case 4: case 5: case 6:/* case 7:*/case 0xf:
+ switch(reg=READ_OP()){
+ case 0: case 1: case 2: case 3:
+ saturn_shift_right(A+reg, adr_af_begin[adr], adr_af_count[adr]);
+ break; // asrb xs
+ }
+ break;
+ }
+ break;
+ case 0xa:
+ saturn_instruction_81a();
+ break;
+ case 0xb:
+ switch(READ_OP()) {
+ case 2: saturn_load_pc(A);break;
+ case 3: saturn_load_pc(C);break;
+ case 4: saturn_store_pc(A);break;
+ case 5: saturn_store_pc(C);break;
+ case 6: saturn_exchange_pc(A);break;
+ case 7: saturn_exchange_pc(C);break;
+ }
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_shift_right(A+(reg&3), BEGIN_W, COUNT_W);
+ break; // asrb w
+ }
+}
+
+static void saturn_instruction_8(void)
+{
+ int oper;
+
+ switch(READ_OP()) {
+ case 0:
+ saturn_instruction_80();
+ break;
+ case 1:
+ saturn_instruction_81();
+ break;
+ case 2: saturn_hst_clear_bits();break;
+ case 3: saturn_hst_bits_cleared();break;
+ case 4: saturn_st_clear_bit();break;
+ case 5: saturn_st_set_bit();break;
+ case 6: saturn_st_jump_bit_clear();break;
+ case 7: saturn_st_jump_bit_set();break;
+ case 8: saturn_p_not_equals(); break;
+ case 9: saturn_p_equals(); break;
+ case 0xa:
+ switch(oper=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_equals(reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_not_equals(reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_equals_zero(A+(oper&3), BEGIN_A, COUNT_A);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_not_equals_zero(A+(oper&3), BEGIN_A, COUNT_A);
+ break;
+ }
+ break;
+ case 0xb:
+ switch(oper=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_greater(reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_smaller(reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_greater_equals(reg_left[oper&3], BEGIN_A, COUNT_A, reg_right[oper&3]);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_smaller_equals(reg_left[oper&3], BEGIN_A, COUNT_A, reg_right[oper&3]);
+ break;
+ }
+ break;
+ case 0xc: saturn_jump((READ_OP_DIS16()+saturn.pc-4)&0xfffff,1);break;
+ case 0xd: saturn_jump(READ_OP_ARG20(),1);break;
+ case 0xe: saturn_call((READ_OP_DIS16()+saturn.pc)&0xfffff);break;
+ case 0xf: saturn_call(READ_OP_ARG20());break;
+ }
+}
+
+static void saturn_instruction_9(void)
+{
+ int adr, oper;
+
+ switch(adr=READ_OP()) {
+ case 0:
+ switch(oper=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_equals(reg_left[oper&3] , saturn.p, 1, reg_right[oper&3]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_not_equals(reg_left[oper&3] ,saturn.p, 1, reg_right[oper&3]);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_equals_zero(A+(oper&3), saturn.p, 1);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_not_equals_zero(A+(oper&3), saturn.p, 1);
+ break;
+ }
+ break;
+ case 1:
+ switch(oper=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_equals(reg_left[oper&3] , 0, saturn.p+1, reg_right[oper&3]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_not_equals(reg_left[oper&3] , 0, saturn.p+1, reg_right[oper&3]);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_equals_zero(A+(oper&3), 0, saturn.p+1);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_not_equals_zero(A+(oper&3), 0, saturn.p+1);
+ break;
+ }
+ break;
+ case 2: case 3: case 4: case 5:
+ case 6: case 7:
+ switch(oper=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_equals(reg_left[oper&3] ,adr_a_begin[adr], adr_a_count[adr], reg_right[oper&3]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_not_equals(reg_left[oper&3] ,adr_a_begin[adr], adr_a_count[adr], reg_right[oper&3]);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_equals_zero(A+(oper&3),adr_a_begin[adr], adr_a_count[adr]);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_not_equals_zero(A+(oper&3) ,adr_a_begin[adr], adr_a_count[adr]);
+ break;
+ }
+ break;
+ case 8:
+ switch(oper=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_greater(reg_left[oper&3] ,saturn.p, 1, reg_right[oper&3]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_smaller(reg_left[oper&3] ,saturn.p, 1, reg_right[oper&3]);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_greater_equals(reg_left[oper&3] ,saturn.p, 1, reg_right[oper&3]);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_smaller_equals(reg_left[oper&3] ,saturn.p, 1, reg_right[oper&3]);
+ break;
+ }
+ break;
+ case 9:
+ switch(oper=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_greater(reg_left[oper&3] , 0, saturn.p+1, reg_right[oper&3]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_smaller(reg_left[oper&3] , 0, saturn.p+1, reg_right[oper&3]);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_greater_equals(reg_left[oper&3], 0, saturn.p+1, reg_right[oper&3]);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_smaller_equals(reg_left[oper&3], 0, saturn.p+1, reg_right[oper&3]);
+ break;
+ }
+ break;
+ case 0xa: case 0xb: case 0xc: case 0xd: case 0xe: case 0xf:
+ switch(oper=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_greater(reg_left[oper&3] ,adr_b_begin[adr], adr_b_count[adr], reg_right[oper&3]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_smaller(reg_left[oper&3] ,adr_b_begin[adr], adr_b_count[adr], reg_right[oper&3]);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_greater_equals(reg_left[oper&3] ,adr_b_begin[adr], adr_b_count[adr], reg_right[oper&3]);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_smaller_equals(reg_left[oper&3] ,adr_b_begin[adr], adr_b_count[adr], reg_right[oper&3]);
+ break;
+ }
+ break;
+ }
+}
+
+static void saturn_instruction_a(void)
+{
+ int reg, adr;
+
+ switch(adr=READ_OP()) {
+ case 0:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_add(add_left[reg], saturn.p, 1, add_right[reg]);
+ break;
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_shift_left(A+(reg&3), saturn.p, 1);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_decrement(A+(reg&3), saturn.p, 1);
+ break;
+ }
+ break;
+ case 1:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_add(add_left[reg], 1, saturn.p+1, add_right[reg]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_shift_left(A+(reg&3), 1, saturn.p+1);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_decrement(A+(reg&3), 1, saturn.p+1);
+ break;
+ }
+ break;
+ case 2: case 3: case 4: case 5: case 6: case 7:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_add(add_left[reg], adr_a_begin[adr], adr_a_count[adr], add_right[reg]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_shift_left(A+(reg&3), adr_a_begin[adr], adr_a_count[adr]);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_decrement(A+(reg&3), adr_a_begin[adr], adr_a_count[adr]);
+ break;
+ }
+ break;
+ case 8:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_clear(A+reg, saturn.p,1);
+ break; // a=0 p
+ case 4: case 5: case 6: case 7:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_copy(reg_right[reg&7], saturn.p,1,reg_left[reg&7]); //!correct
+ break; // a=b p
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_exchange(reg_left[reg&3], saturn.p,1,reg_right[reg&3]);
+ break; // abex p
+ }
+ break;
+ case 9:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_clear(A+reg,0,saturn.p+1);
+ break; // a=0 wp
+ case 4: case 5: case 6: case 7:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_copy(reg_right[reg&7], 0, saturn.p+1, reg_left[reg&7]); //!correct
+ break; // a=b wp
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_exchange(reg_left[reg&3], 0, saturn.p+1, reg_right[reg&3]);
+ break; // abex wp
+ }
+ break;
+ case 0xa: case 0xb: case 0xc: case 0xd: case 0xe: case 0xf:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_clear(A+reg, adr_b_begin[adr], adr_b_count[adr]);
+ break; // a=0 xs
+ case 4: case 5: case 6: case 7:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_copy(reg_right[reg&7], adr_b_begin[adr], adr_b_count[adr],
+ reg_left[reg&7]); //correct
+ break; // a=b xs
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_exchange(reg_left[reg&3], adr_b_begin[adr], adr_b_count[adr],
+ reg_right[reg&3]);
+ break; // abex xs
+ }
+ break;
+ }
+}
+
+static void saturn_instruction_b(void)
+{
+ int adr, reg;
+
+ switch(adr=READ_OP()) {
+ case 0:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_sub(sub_left[reg], saturn.p, 1, S64_READ_P(sub_right[reg]));
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_increment(A+(reg&3), saturn.p, 1); break; // a=a+1 p
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_sub2(sub_left[reg], saturn.p, 1, S64_READ_P(sub_right[reg]));
+ break;
+ }
+ break;
+ case 1:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_sub(sub_left[reg], 1, saturn.p+1, sub_right[reg]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_increment(A+(reg&3), 1, saturn.p+1); break; // a=a+1 wp
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_sub2(sub_left[reg], 1, saturn.p+1, sub_right[reg]);
+ break;
+ }
+ break;
+ case 2: case 3: case 4: case 5: case 6: case 7:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_sub(sub_left[reg], adr_a_begin[adr], adr_a_count[adr],
+ sub_right[reg]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_increment(A+(reg&3), adr_a_begin[adr], adr_a_count[adr]);
+ break; // a=a+1 xs
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_sub2(sub_left[reg], adr_a_begin[adr], adr_a_count[adr],
+ sub_right[reg]);
+ break;
+ }
+ break;
+ case 8:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_shift_nibble_left(A+reg, saturn.p, 1); break; // asl p
+ case 4: case 5: case 6: case 7:
+ saturn_shift_nibble_right(A+(reg&3), saturn.p, 1); break; // asr p
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_invert(A+(reg&3), saturn.p, 1); break; // A=-A p
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_negate(A+(reg&3), saturn.p, 1); break; // A=-A-1 p
+ }
+ break;
+ case 9:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_shift_nibble_left(A+reg,0,saturn.p+1); break; // asl wp
+ case 4: case 5: case 6: case 7:
+ saturn_shift_nibble_right(A+(reg&3),0,saturn.p+1); break; // asr wp
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_invert(A+(reg&3),0,saturn.p+1); break; // A=-A wp
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_negate(A+(reg&3),0,saturn.p+1); break; // A=-A-1 wp
+ }
+ break;
+ case 0xa: case 0xb: case 0xc: case 0xd: case 0xe: case 0xf:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_shift_nibble_left(A+reg,adr_b_begin[adr], adr_b_count[adr]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_shift_nibble_right(A+(reg&3), adr_b_begin[adr], adr_b_count[adr]);
+ break;
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_invert(A+(reg&3), adr_b_begin[adr], adr_b_count[adr]);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_negate(A+(reg&3), adr_b_begin[adr], adr_b_count[adr]);
+ break;
+ }
+ break;
+ }
+}
+
+
+static void saturn_instruction(void)
+{
+ int reg, adr;
+
+ switch(READ_OP()) {
+ case 0:
+ switch(READ_OP()) {
+ case 0: saturn_return_xm_set();break;
+ case 1: saturn_return(1);break;
+ case 2: saturn_return_carry_set();break;
+ case 3: saturn_return_carry_clear();break;
+ case 4: saturn_sethex();break;
+ case 5: saturn_setdec();break;
+ case 6: saturn_push_c();break;
+ case 7: saturn_pop_c();break;
+ case 8: saturn_clear_st();break;
+ case 9: saturn_st_to_c();break;
+ case 0xa: saturn_c_to_st();break;
+ case 0xb: saturn_exchange_c_st();break;
+ case 0xc:
+ saturn_inc_p();
+ break;
+ case 0xd:
+ saturn_dec_p();
+ break;
+ case 0xf: saturn_return_interrupt();break;
+ case 0xe:
+ saturn_instruction_0e();
+ break;
+ }
+ break;
+ case 1:
+ saturn_instruction_1();
+ break;
+ case 2:
+ saturn_load_p();
+ break;
+ case 3: saturn_load_reg(C);break; // lc
+ case 4:
+ adr=READ_OP_DIS8();
+ if (adr==0) {
+ saturn_return(saturn.carry);
+ } else {
+ saturn_jump((saturn.pc+adr-2)&0xfffff, saturn.carry);
+ }
+ break;
+ case 5:
+ adr=READ_OP_DIS8();
+ if (adr==0) {
+ saturn_return(!saturn.carry);
+ } else {
+ saturn_jump((saturn.pc+adr-2)&0xfffff,!saturn.carry);
+ }
+ break;
+ case 6:
+ adr=READ_OP_DIS12();
+ saturn_jump((saturn.pc+adr-3)&0xfffff,1); break;
+ case 7:
+ adr=READ_OP_DIS12();
+ saturn_call((adr+saturn.pc)&0xfffff); break;
+ case 8:
+ saturn_instruction_8();
+ break;
+ case 9:
+ saturn_instruction_9();
+ break;
+ case 0xa:
+ saturn_instruction_a();
+ break;
+ case 0xb:
+ saturn_instruction_b();
+ break;
+ case 0xc:
+ switch (reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_add(add_left[reg], BEGIN_A, COUNT_A, add_right[reg]);
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_shift_left(A+(reg&3), BEGIN_A, COUNT_A);
+ break;
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_decrement(A+(reg&3), BEGIN_A, COUNT_A);
+ break;
+ }
+ break;
+ case 0xd:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_clear(A+reg, BEGIN_A, COUNT_A);
+ break; // a=0 a
+ case 4: case 5: case 6: case 7:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_copy(reg_right[reg&7], BEGIN_A, COUNT_A, reg_left[reg&7]); //correct
+ break; // a=b a
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_exchange(reg_left[reg&3], BEGIN_A, COUNT_A, reg_right[reg&3]);
+ break; // abex a
+ }
+ break;
+ case 0xe:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_sub(sub_left[reg], BEGIN_A, COUNT_A, S64_READ_A(sub_right[reg]));
+ break;
+ case 4: case 5: case 6: case 7:
+ saturn_increment(A+(reg&3), BEGIN_A, COUNT_A);
+ break; // a=a+1 a
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_sub2(sub_left[reg], BEGIN_A, COUNT_A, S64_READ_A(sub_right[reg]));
+ break;
+ }
+ break;
+ case 0xf:
+ switch(reg=READ_OP()) {
+ case 0: case 1: case 2: case 3:
+ saturn_shift_nibble_left(A+reg,BEGIN_A, COUNT_A);
+ break; // asl a
+ case 4: case 5: case 6: case 7:
+ saturn_shift_nibble_right(A+(reg&3),BEGIN_A, COUNT_A);
+ break; // asr a
+ case 8: case 9: case 0xa: case 0xb:
+ saturn_invert(A+(reg&3),BEGIN_A, COUNT_A);
+ break; // A=-A a
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ saturn_negate(A+(reg&3),BEGIN_A, COUNT_A);
+ break; // A=-A-1 a
+ }
+ break;
+ }
+}