PUSH

src/z80_ops.inc.c

@@ -218,7 +218,17 @@ static uint8_t z80_inst_ld_dd_nn(Z80 *z80, uint8_t opcode)
 
 // LD SP, IY
 
-// PUSH qq
+/*
+    PUSH qq (0xC5, 0xD5, 0xE5, 0xF5):
+    Push qq onto the stack, and decrement SP by two.
+*/
+static uint8_t z80_inst_push_qq(Z80 *z80, uint8_t opcode)
+{
+    uint8_t pair = extract_pair(opcode);
+    stack_push(z80, pair);
+    z80->regfile.pc++;
+    return 11;
+}
 
 // PUSH IX
 

src/z80_tables.inc.c

@@ -199,7 +199,7 @@ static DispatchTable instruction_table = {
     [0xC2] = z80_inst_jp_cc_nn,
     [0xC3] = z80_inst_jp_nn,
     [0xC4] = z80_inst_call_cc_nn,
-    [0xC5] = z80_inst_unimplemented,  // TODO
+    [0xC5] = z80_inst_push_qq,
     [0xC6] = z80_inst_unimplemented,  // TODO
     [0xC7] = z80_inst_unimplemented,  // TODO
     [0xC8] = z80_inst_unimplemented,  // TODO
@@ -215,7 +215,7 @@ static DispatchTable instruction_table = {
     [0xD2] = z80_inst_jp_cc_nn,
     [0xD3] = z80_inst_out_n_a,
     [0xD4] = z80_inst_call_cc_nn,
-    [0xD5] = z80_inst_unimplemented,  // TODO
+    [0xD5] = z80_inst_push_qq,
     [0xD6] = z80_inst_unimplemented,  // TODO
     [0xD7] = z80_inst_unimplemented,  // TODO
     [0xD8] = z80_inst_unimplemented,  // TODO
@@ -231,7 +231,7 @@ static DispatchTable instruction_table = {
     [0xE2] = z80_inst_jp_cc_nn,
     [0xE3] = z80_inst_unimplemented,  // TODO
     [0xE4] = z80_inst_call_cc_nn,
-    [0xE5] = z80_inst_unimplemented,  // TODO
+    [0xE5] = z80_inst_push_qq,
     [0xE6] = z80_inst_unimplemented,  // TODO
     [0xE7] = z80_inst_unimplemented,  // TODO
     [0xE8] = z80_inst_unimplemented,  // TODO
@@ -247,7 +247,7 @@ static DispatchTable instruction_table = {
     [0xF2] = z80_inst_jp_cc_nn,
     [0xF3] = z80_inst_di,
     [0xF4] = z80_inst_call_cc_nn,
-    [0xF5] = z80_inst_unimplemented,  // TODO
+    [0xF5] = z80_inst_push_qq,
     [0xF6] = z80_inst_unimplemented,  // TODO
     [0xF7] = z80_inst_unimplemented,  // TODO
     [0xF8] = z80_inst_unimplemented,  // TODO