diff options
| author | Michael Pavone <pavone@retrodev.com> | 2019-02-02 15:10:18 -0800 |
|---|---|---|
| committer | Michael Pavone <pavone@retrodev.com> | 2019-02-02 15:10:18 -0800 |
| commit | 8c126fe314843f54ca26e495c6bf656042513bd9 (patch) | |
| tree | 9543f84fb8854d8c8b25b927f004efacb815b41c /z80.cpu | |
| parent | d7c08d9760dae9bfeaf44655f9ec280714ac0d85 (diff) | |
Implemented BIT instruction in new Z80 core and fixed a bunch of WZ register calculations
Diffstat (limited to 'z80.cpu')
| -rw-r--r-- | z80.cpu | 75 |
1 files changed, 63 insertions, 12 deletions
@@ -226,40 +226,58 @@ fd 01110RRR ld_to_iy z80_store_hl 00001010 ld_a_from_bc - lsl b 8 scratch1 - or c scratch1 scratch1 + lsl b 8 wz + or c wz wz + mov wz scratch1 + add 1 wz wz ocall read_8 mov scratch1 a 00011010 ld_a_from_de - lsl d 8 scratch1 - or e scratch1 scratch1 + lsl d 8 wz + or e wz wz + mov wz scratch1 + add 1 wz wz ocall read_8 mov scratch1 a 00111010 ld_a_from_immed z80_fetch_immed16 mov wz scratch1 + add 1 wz wz ocall read_8 mov scratch1 a 00000010 ld_a_to_bc + local tmp 8 lsl b 8 scratch2 or c scratch2 scratch2 mov a scratch1 + add c 1 tmp + lsl a 8 wz + or tmp wz wz ocall write_8 00010010 ld_a_to_de + local tmp 8 lsl d 8 scratch2 or e scratch2 scratch2 mov a scratch1 + add e 1 tmp + lsl a 8 wz + or tmp wz wz ocall write_8 00110010 ld_a_to_immed + local tmp 16 z80_fetch_immed16 mov wz scratch2 mov a scratch1 + add 1 wz wz ocall write_8 + and 0xFF wz wz + lsl a 8 tmp + or tmp wz wz ed 01000111 ld_i_a mov a i @@ -305,6 +323,7 @@ z80_fetch16_from_immed mov wz scratch1 ocall read_8 mov scratch1 high + add 1 wz wz 00101010 ld_hl_from_immed meta low l @@ -336,6 +355,7 @@ z80_fetch_reg16_from_immed ocall read_8 lsl scratch1 8 scratch1 or scratch1 reg reg + add 1 wz wz ed 01111011 ld_sp_from_immed meta reg sp @@ -358,6 +378,7 @@ fd 00101010 ld_iy_from_immed mov wz scratch2 mov h scratch1 ocall write_8 + add 1 wz wz z80_regpair_to_immed z80_fetch_immed16 @@ -368,6 +389,7 @@ z80_regpair_to_immed mov high scratch1 mov wz scratch2 ocall write_8 + add 1 wz wz ed 01000011 ld_bc_to_immed meta low c @@ -395,13 +417,6 @@ ed 01110011 ld_sp_to_immed cycles 2 lsl h 8 sp or l sp sp - mov wz scratch2 - mov sp scratch1 - ocall write_8 - add 1 wz wz - lsr sp 8 scratch1 - mov wz scratch2 - ocall write_8 z80_push cycles 1 @@ -1699,4 +1714,40 @@ fdcb 00111110 srl_iyd z80_srl_index tmp fdcb 00111RRR srl_iyd_reg - z80_srl_index main.R
\ No newline at end of file + z80_srl_index main.R + +cb 01BBBRRR bit_reg + local tmp 8 + lsl 1 B tmp + mov main.R last_flag_result + and main.R tmp tmp + update_flags SZH1PN0 + +cb 01BBB110 bit_hl + local tmp 8 + z80_fetch_hl + lsl 1 B tmp + lsr wz 8 last_flag_result + and scratch1 tmp tmp + update_flags SZH1PN0 + + +ddcb 01BBBRRR bit_ixd + local tmp 8 + mov wz scratch1 + ocall read_8 + cycles 1 + lsl 1 B tmp + lsr wz 8 last_flag_result + and scratch1 tmp tmp + update_flags SZH1PN0 + +fdcb 01BBBRRR bit_iyd + local tmp 8 + mov wz scratch1 + ocall read_8 + cycles 1 + lsl 1 B tmp + lsr wz 8 last_flag_result + and scratch1 tmp tmp + update_flags SZH1PN0
\ No newline at end of file |