mirror of
https://github.com/UzixLS/zx-sizif-512.git
synced 2025-07-19 07:11:36 +03:00
implement fast forward
This commit is contained in:
Eugene Lozovoy
@ -66,6 +66,7 @@ Sega gamepad support will be available starting from PCB rev.D (or Rev.C with sl
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| Button | Function |
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| - | - |
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| F1 | Pause |
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| F2 | Fast forward |
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| F5 | Magic button |
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| F10 | Reboot |
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| F12 | Reboot |
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@ -16,6 +16,7 @@ module cpu(
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input [2:0] ram_page128,
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input machine_t machine,
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input turbo_t turbo,
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input fastforward,
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input hold,
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input ext_wait_cycle1,
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input ext_wait_cycle2,
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@ -90,7 +91,13 @@ localparam INT_L_S128 = 6'd36;
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localparam INT_V_PENT = 239;
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localparam INT_H_PENT = 322;
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localparam INT_L_PENT = 6'd32;
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localparam INT_V_FF1 = 0;
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localparam INT_V_FF2 = 106;
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localparam INT_V_FF3 = 212;
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localparam INT_H_FF = 0;
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wire int_begin =
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(fastforward)?
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(vc == INT_V_FF1 || vc == INT_V_FF2 || vc == INT_V_FF3) && hc == INT_H_FF :
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(machine == MACHINE_S48)?
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vc == INT_V_S48 && hc == INT_H_S48 :
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(machine == MACHINE_S128 || machine == MACHINE_S3)?
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@ -14,6 +14,7 @@ module magic(
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input magic_button,
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input pause_button,
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input fastforward_button,
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input div_paged,
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input basic48_paged,
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@ -40,7 +41,8 @@ module magic(
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output reg sd_indication_en,
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output reg bright_boost,
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output reg zxkit1,
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output reg joy_a_up
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output reg joy_a_up,
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output reg fastforward
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);
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localparam magic_on_start = 1'b1;
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@ -63,7 +65,7 @@ always @(posedge clk28 or negedge rst_n) begin
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opcode_is_reading <= 0;
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end
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else begin
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if ((magic_button || pause_button) && n_int == 1'b1 && n_int_next == 1'b0) begin
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if ((magic_button || pause_button || fastforward_button) && n_int == 1'b1 && n_int_next == 1'b0) begin
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if (!magic_mode)
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n_nmi <= 1'b0;
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magic_mode <= 1'b1;
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@ -136,6 +138,7 @@ always @(posedge clk28 or negedge rst_n) begin
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magic_reboot <= 0;
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magic_beeper <= 0;
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rom_wren <= 0;
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fastforward <= 0;
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end
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else if (config_cs && bus.wr) case (bus.a[15:8])
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8'h01: {rom_wren, magic_reboot, magic_beeper} <= bus.d[2:0];
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@ -154,11 +157,12 @@ always @(posedge clk28 or negedge rst_n) begin
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8'h0E: autoturbo_en <= bus.d[0];
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8'h0F: zxkit1 <= bus.d[0];
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8'h10: joy_a_up <= bus.d[0];
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8'h11: fastforward <= bus.d[0];
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endcase
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end
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reg config_rd;
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wire [7:0] config_data = {4'b0000, div_paged, 1'b1, pause_button, magic_button};
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wire [7:0] config_data = {4'b0000, div_paged, fastforward_button, pause_button, magic_button};
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always @(posedge clk28 or negedge rst_n) begin
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if (!rst_n)
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config_rd <= 0;
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@ -189,6 +193,8 @@ end
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always @(posedge clk28 or negedge rst_n) begin
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if (!rst_n)
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turbo <= TURBO_NONE;
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else if (fastforward)
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turbo <= TURBO_14;
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else if (autoturbo_en && div_paged && !magic_map)
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turbo <= TURBO_14;
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else if (autoturbo_en && |portfe_noturbo)
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@ -16,6 +16,7 @@ module ps2#(
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output reg key_magic,
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output reg key_reset,
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output reg key_pause,
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output reg key_fastforward,
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output reg joy_up,
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output reg joy_down,
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output reg joy_left,
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@ -57,6 +58,7 @@ always @(posedge clk or negedge rst_n) begin
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is_ext <= 0;
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key_magic <= 0;
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key_pause <= 0;
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key_fastforward <= 0;
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{joy_up, joy_down, joy_left, joy_right, joy_fire} <= 0;
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{key2_a, key2_b, key2_c, key2_d, key2_e, key2_f, key2_g, key2_h, key2_i, key2_j, key2_k, key2_l, key2_m, key2_n} <= 0;
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{key2_o, key2_p, key2_q, key2_r, key2_s, key2_t, key2_u, key2_v, key2_w, key2_x, key2_y, key2_z, key2_0, key2_1} <= 0;
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@ -137,6 +139,7 @@ always @(posedge clk or negedge rst_n) begin
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`PS2_PGDN: key2_pgdn <= is_press;
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`PS2_F1: key_pause <= is_press;
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`PS2_F2: key_fastforward <= is_press;
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`PS2_F5: key_magic <= is_press;
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`PS2_F10: key_reset0 <= is_press;
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`PS2_F12: key_reset0 <= is_press;
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@ -109,6 +109,7 @@ wire joy_a_up;
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wire div_map;
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wire div_mapram;
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wire basic48_paged;
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wire fastforward;
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/* CPU BUS */
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@ -230,7 +231,7 @@ rgb rgb0(
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/* PS/2 KEYBOARD */
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wire [4:0] ps2_kd;
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wire ps2_key_magic;
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wire ps2_key_magic, ps2_key_fastforward;
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wire ps2_joy_up, ps2_joy_down, ps2_joy_left, ps2_joy_right, ps2_joy_fire;
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`ifndef REV_C
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ps2 #(.CLK_FREQ(28_000_000)) ps2_0(
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@ -243,6 +244,7 @@ ps2 #(.CLK_FREQ(28_000_000)) ps2_0(
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.key_magic(ps2_key_magic),
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.key_reset(ps2_key_reset),
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.key_pause(ps2_key_pause),
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.key_fastforward(ps2_key_fastforward),
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.joy_up(ps2_joy_up),
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.joy_down(ps2_joy_down),
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.joy_left(ps2_joy_left),
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@ -338,6 +340,7 @@ cpu cpu0(
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.machine(machine),
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.video_contention(video_contention),
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.turbo(turbo),
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.fastforward(fastforward),
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.hold(mem_wait),
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.ext_wait_cycle2(ay_ext_wait_cycle2 | div_ext_wait_cycle2),
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@ -389,6 +392,7 @@ magic magic0(
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.magic_button(~n_magic || joy_mode || ps2_key_magic),
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.pause_button(ps2_key_pause || joy_start),
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.fastforward_button(ps2_key_fastforward),
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.div_paged(div_map && !div_mapram),
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.basic48_paged(basic48_paged),
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@ -415,7 +419,8 @@ magic magic0(
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.sd_indication_en(sd_indication_en),
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.bright_boost(bright_boost),
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.zxkit1(zxkit1),
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.joy_a_up(joy_a_up)
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.joy_a_up(joy_a_up),
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.fastforward(fastforward)
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);
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@ -46,6 +46,7 @@ bright DB BRIGHT_DEFAULT
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autoturbo DB 0
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zxkit1 DB 0
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joy_a_up DB 0
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fastforward DB 0
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ENDS
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STRUCT CFGEXT_T
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@ -56,6 +56,8 @@ startup_handler:
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call detect_external_bdi
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call check_custom_rom
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.warm_boot:
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xor a
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ld (cfg_saved.fastforward), a
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call load_config
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call init_cpld
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call save_initialized
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@ -80,15 +82,18 @@ nmi_handler:
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ld (var_magic_enter_cnt), a
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ld (var_magic_leave_cnt), a
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.key_wait_loop:
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call check_entering_pause ; A[1] == 1 if pause button is pressed
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bit 1, a ; ...
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jp nz, .enter_pause ; ...
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xor a ;
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in a, (#ff) ;
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bit 2, a ; A[2] == 1 if fastforward button is pressed
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jr nz, .enter_fastforward ; ...
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bit 1, a ; A[1] == 1 if pause button is pressed
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jr nz, .enter_pause ; ...
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call delay_10ms ;
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call check_entering_menu ; A == 1 if we are entering menu, A == 2 if we are leaving to...
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bit 0, a ; ...default nmi handler, A == 0 otherwise
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jp nz, .enter_menu ; ...
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bit 1, a ; ...
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jr z, .key_wait_loop ; ...
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cp 1 ; ...default nmi handler, A == 0 otherwise
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jr z, .enter_menu ; ...
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cp 2 ; ...
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jr nz, .key_wait_loop ; ...
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.leave_no_key:
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xor a ; disable border
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ld bc, #01ff ; ...
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@ -96,10 +101,14 @@ nmi_handler:
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ld bc, #00ff ; ...
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in a, (c) ; if divmmc paged - just do retn
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bit 3, a ; ...
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jr nz, exit_with_ret ; ...
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jp nz, exit_with_ret ; ...
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ld hl, #0066 ; otherwise jump to default nmi handler
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jr exit_with_jp ; ...
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jp exit_with_jp ; ...
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.enter_fastforward:
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ld hl, nmi_fastforward
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ld (var_main_fun), hl
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jr .enter
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.enter_pause:
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ld hl, nmi_pause
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ld (var_main_fun), hl
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@ -231,6 +240,8 @@ load_user_config:
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.quirks: ; some options shouldn't be saved by user, so we just overwrite them from default config
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ld a, (CFG_DEFAULT.ay) ; AY should be disabled only by detect_external_ay
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ld (cfg_saved.ay), a ; ...
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ld a, (CFG_DEFAULT.fastforward)
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ld (cfg_saved.fastforward), a
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ret
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; OUT - A = 1 if error, 0 if ok
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@ -420,13 +431,6 @@ check_custom_rom:
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ret
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; OUT - A bit 1 if we are entering pause, 0 otherwise
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check_entering_pause:
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xor a ; read pause key state in bit 1 of #00FF port
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in a, (#ff) ; ...
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ret
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; OUT - A = 1 if we are entering menu, A = 2 if we are leaving menu, A = 0 otherwise
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; OUT - F - garbage
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check_entering_menu:
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@ -458,6 +462,10 @@ check_entering_menu:
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; OUT - AF - garbage
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; OUT - BC - garbage
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delay_10ms:
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ld c, 7*4
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ld a, (cfg.fastforward)
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or a
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jr nz, .loop
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ld c, 7
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ld a, (cfg.clock)
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or a
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@ -624,8 +632,18 @@ bootmenu:
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ld hl, menuboot
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call menu_init
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call menu_input_loop
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call wait_for_keys_release
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ret
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jp wait_for_keys_release
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nmi_fastforward:
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ld a, (cfg.fastforward)
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xor 1
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ld (cfg.fastforward), a
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ld bc, #11ff
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out (c), a
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ei
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halt
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jp wait_for_keys_release
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nmi_pause:
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@ -639,19 +657,7 @@ nmi_pause:
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ld a, (var_exit_flag)
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or a
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jr z, .loop
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.wait_for_pause_key_release:
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xor a ; read magic/pause keys state from port #00FF
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in a, (#ff) ; ...
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and #03 ; ...
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jr nz, .wait_for_pause_key_release
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ei ; second read to fix start button bouncing on 8bitdo gamepad
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halt ; ...
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.wait_for_pause_key_release2:
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xor a ; read magic/pause keys state from port #00FF
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in a, (#ff) ; ...
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and #03 ; ...
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jr nz, .wait_for_pause_key_release2
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ret
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jp wait_for_keys_release
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nmi_menu:
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@ -674,8 +680,7 @@ nmi_menu:
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call menu_init
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.loop:
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call menu_input_loop
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call wait_for_keys_release
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ret
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jp wait_for_keys_release
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menu_input_loop:
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@ -697,6 +702,9 @@ menu_input_loop:
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wait_for_keys_release:
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ld b, 2 ; second attempt to fix start button bouncing on 8bitdo gamepad
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.attempt:
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push bc
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.loop:
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ei
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halt
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@ -704,10 +712,12 @@ wait_for_keys_release:
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xor a
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or b
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jr nz, .loop
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xor a ; read magic/pause keys state from port #00FF
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xor a ; read magic/pause/fastforward keys state from port #00FF
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in a, (#ff) ; ...
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and #03 ; ...
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and #07 ; ...
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jr nz, .loop
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pop bc
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djnz .attempt
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ret
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