diff --git a/src/asm/parser.y b/src/asm/parser.y
index 2d0ecdcb..7c679a7f 100644
--- a/src/asm/parser.y
+++ b/src/asm/parser.y
@@ -2035,14 +2035,22 @@ z80_ld_a_comma_args	: reg_rr { // $0A,$1A,$2A,$3A: ld a, [<r16>]
 		| T_MODE_A T_OP_SUB T_TOKEN_C T_OP_SUB z80_ld_a_comma_a_minus_c_minus_args
 ;
 
-z80_ld_a_comma_a_plus_c_plus_args	: T_TOKEN_C { out_AbsByte(0x89); } // $89: adc a, c ==> ld a, a + c + c
+z80_ld_a_comma_a_plus_c_plus_args	: reg_nc {
+			// $88-$8F: adc a, <r8> ==> ld a, a + c + <r8> (except $89: adc a, c)
+			out_AbsByte(0x88 | $1);
+		}
+		| T_TOKEN_C { out_AbsByte(0x89); } // $89: adc a, c ==> ld a, a + c + c
 		| reloc_8bit { // $CE: adc a, <imm8> ==> ld a, a + c + <imm8>
 			out_AbsByte(0xCE);
 			out_RelByte(&$1, 1);
 		}
 ;
 
-z80_ld_a_comma_a_minus_c_minus_args	: T_TOKEN_C { out_AbsByte(0x99); } // $99: sbc a, c ==> ld a, a - c - c
+z80_ld_a_comma_a_minus_c_minus_args	: reg_nc {
+			// $98-$9F: sbc a, <r8> ==> ld a, a - c - <r8> (except $99: sbc a, c)
+			out_AbsByte(0x98 | $1);
+		}
+		| T_TOKEN_C { out_AbsByte(0x99); } // $99: sbc a, c ==> ld a, a - c - c
 		| reloc_8bit { // $DE: sbc a, <imm8> ==> ld a, a - c - <imm8>
 			out_AbsByte(0xDE);
 			out_RelByte(&$1, 1);