| ← C207 | Map | C2A3 → |
C21C: Draw the options screen
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Renders the whole options screen from the current option values. It draws the "OPTIONS" heading, the "Q returns" line and the "LOAD LEVELS" prompt. One line per option shows its value.
Reads the bat side, the sound-effects flag and the control type to choose each line's text. Side effect: makes the sound primitive play or mute to match the sound-effects flag.
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| draw_options_menu | C21C | LD HL,SCREEN_BASE+$2B | "OPTIONS" heading in double height, bright yellow on blue |
| C21F | LD DE,options_text | ||
| C222 | LD C,$4E | ||
| C224 | CALL print_string_2x | ||
| C227 | LD HL,SCREEN_BASE+$10E3 | The "Q" RETURNS TO MAIN MENU line in bright white on black, the attribute reused by every line below until reset | |
| C22A | LD DE,opt_return | ||
| C22D | LD C,$47 | ||
| C22F | CALL print_string | ||
| C232 | LD HL,opt_bat_side_cell | Bat-side line | |
| C235 | LD A,(bat_side) | A non-zero bat side selects "BAT IS ON THE - LEFT". | |
| C238 | OR A | ||
| C239 | JR Z,draw_options_menu_0 | ||
| C23B | LD DE,opt_bat_left | ||
| C23E | JR draw_options_menu_1 | ||
| draw_options_menu_0 | C240 | LD DE,opt_bat_right | Bat side 0 selects "BAT IS ON THE - RIGHT". |
| draw_options_menu_1 | C243 | CALL print_string | Print whichever was chosen. |
| C246 | LD HL,opt_sound_cell | Sound line | |
| C249 | LD A,(sound_fx) | Sound effects: mute them on 0, and enable them on any other value. | |
| C24C | OR A | ||
| C24D | JR Z,draw_options_menu_2 | ||
| C24F | LD A,$3E | Sound on: write the "LD A,n" opcode over the first byte, to restore its normal "LD A,$10" so the speaker primitive runs; pick the "SOUND FX - ON" text. | |
| C251 | LD (sound_blip),A | ||
| C254 | LD DE,opt_sound_on | ||
| C257 | JR draw_options_menu_3 | ||
| draw_options_menu_2 | C259 | LD A,$C9 | Sound off: write the RET opcode over the first byte so the primitive returns at once and stays silent; pick the "SOUND FX - OFF" text. |
| C25B | LD (sound_blip),A | ||
| C25E | LD DE,opt_sound_off | ||
| draw_options_menu_3 | C261 | CALL print_string | Render the sound line (the on and off paths merge here). |
| C264 | LD HL,opt_ball_speed_cell | Print the ball-speed line. The speed handler writes the speed digit (1–6) into the string. | |
| C267 | LD DE,opt_ball_speed | ||
| C26A | CALL print_string | ||
| C26D | LD HL,opt_bat_ctrl_head | "BAT CONTROL TYPE" header in bright white on red | |
| C270 | LD DE,opt_bat_control | ||
| C273 | LD C,$57 | ||
| C275 | CALL print_string | ||
| C278 | LD HL,opt_bat_ctrl_value | Bat-control value line | |
| C27B | LD A,(bat_control_type) | Control type: the first direct-control type selects "DUAL SPEED SLOW - n". The option handlers write each digit n into its string. | |
| C27E | OR A | ||
| C27F | JR Z,draw_options_menu_5 | ||
| C281 | CP $01 | ||
| C283 | JR NZ,draw_options_menu_4 | ||
| C285 | LD DE,opt_dual_slow | ||
| C288 | JR draw_options_menu_6 | ||
| draw_options_menu_4 | C28A | LD DE,opt_dual_fast | The second direct-control type selects "DUAL SPEED FAST - n". |
| C28D | JR draw_options_menu_6 | ||
| draw_options_menu_5 | C28F | LD DE,opt_inertia | Inertia control selects "INERTIA - n". |
| draw_options_menu_6 | C292 | LD C,$47 | Print whichever was chosen. |
| C294 | CALL print_string | ||
| C297 | LD HL,opt_load_levels_cell | Print the "LOAD LEVELS" prompt. Fire on this line loads the level set from tape. | |
| C29A | LD DE,msg_load_levels | ||
| C29D | LD C,$47 | ||
| C29F | CALL print_string | ||
| C2A2 | RET | ||
| ← C207 | Map | C2A3 → |