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Routines |
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Sets up which room to display based on display flags and processes objects for that room.
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| CheckFlagAndSetDisplay | 46243 | LD A,(46242) | A=*DisplaySetupFlag. | |
| 46246 | INC A | Increment A. | ||
| 46247 | JR NZ,CheckFlagAndSetDisplay_NoAction | Jump to CheckFlagAndSetDisplay_NoAction if display already set up. | ||
| 46249 | LD (46242),A | Write A to *DisplaySetupFlag. | ||
| 46252 | LD A,(45427) | A=*DisplayModeFlag. | ||
| 46255 | BIT 7,A | Jump to CheckFlagAndSetDisplay_NoAction if special display mode not needed. | ||
| 46257 | JR Z,CheckFlagAndSetDisplay_NoAction | |||
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Set up special display mode.
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| 46259 | LD A,254 | Write 254 to *RoomDisplayParameter (set room display parameter). | ||
| 46261 | LD (41012),A | |||
| 46264 | LD HL,(45426) | Write *DisplayDataPointer to *DisplayPointer. | ||
| 46267 | LD (41007),HL | |||
| 46270 | OR %00000001 | Set bit 0. | ||
| 46272 | RET | Return. | ||
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This entry point is used by the routine at InitialiseDisplayBuffer.
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| CheckFlagAndSetDisplay_Entry | 46273 | LD A,(40975) | Jump to CheckFlagAndSetDisplay if *DisplayMode is 5. | |
| 46276 | CP 5 | |||
| 46278 | JR Z,CheckFlagAndSetDisplay | |||
| 46280 | LD A,(45427) | A=*DisplayModeFlag (check display mode flag). | ||
| 46283 | BIT 7,A | Jump to CheckFlagAndSetDisplay_ProcessObjects if special mode isn't needed. | ||
| 46285 | JR Z,CheckFlagAndSetDisplay_ProcessObjects | |||
| CheckFlagAndSetDisplay_NoAction | 46287 | LD A,255 | A=255. | |
| 46289 | CP 255 | Compare with 255. | ||
| 46291 | RET | Return. | ||
| CheckFlagAndSetDisplay_ProcessObjects | 46292 | PUSH IY | Stash IY on the stack. | |
| 46294 | LD IX,(45438) | IX=*ObjectTablePointer (get object table pointer). | ||
| 46298 | LD A,(40989) | A=*ObjectAttributeValue (get object attribute). | ||
| 46301 | AND %00000001 | Keep only bit 0. | ||
| 46303 | LD (41016),A | Write A to *ObjectAttributeFlag (save attribute flag). | ||
| 46306 | LD A,(40975) | Compare *DisplayMode with 5. | ||
| 46309 | CP 5 | |||
| 46311 | LD IY,54171 | IY=ProcessObjectEntryAlternate (set object processing routine). | ||
| 46315 | JR C,CheckFlagAndSetDisplay_ProcessLoop | Jump to CheckFlagAndSetDisplay_ProcessLoop if *DisplayMode is less than 5. | ||
| 46317 | LD IY,54122 | IY=ProcessObjectEntry (use alternate routine). | ||
| CheckFlagAndSetDisplay_ProcessLoop | 46321 | CALL CheckFlagAndSetDisplay_ProcessPointer | Call CheckFlagAndSetDisplay_ProcessPointer (process display pointer). | |
| 46324 | CP 255 | Compare with 255. | ||
| 46326 | LD (45438),IX | Write IX to *ObjectTablePointer (save updated object table pointer). | ||
| 46330 | POP IY | Restore IY from the stack. | ||
| 46332 | RET | Return. | ||
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