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Routines |
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The room name bar displayed on the 7th character row defaults to an attribute value of 71 as per the instruction at 28172. However in cases where the current room has a name record defined in the table at 42765, the attribute defined in that record will override this default attribute. Therefore, the default attribute is only visible in rooms without names.
Used by the routine at 28101.
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| 28172 | LD A,71 | Store 71 (white INK, black PAPER, BRIGHT) at 23695... | ||
| 28174 | LD (23695),A | ... | ||
| 28177 | LD HL,16576 | Load HL with display file address corresponding to (0, 6) (characters)... | ||
| 28180 | LD (54110),HL | ...and move bitmap virtual text cursor here | ||
| 28183 | LD HL,32 | Load HL (repeat counter) with 32 | ||
| 28186 | LD A,93 | Set character to be repeated to 93 (body of "room name bar")... | ||
| 28188 | LD (54235),A | ... | ||
| 28191 | CALL 54231 | Print the character 32 times across width of screen | ||
| 28194 | LD HL,42765 | Point HL at start of table of room names | ||
| 28197 | LD A,(23701) | Load B with Magic Knight's current room... | ||
| 28200 | LD B,A | ... | ||
| 28201 | CALL 54269 | Advance HL to name entry for Magic Knight's current room | ||
| 28204 | LD A,(HL) | Load first value (attribute) into A | ||
| 28205 | OR A | If attribute value is zero (i.e. no room name defined)... | ||
| 28206 | RET Z | ...then return | ||
| 28207 | LD (23695),A | Store required attribute value at 23695 | ||
| 28210 | INC HL | Advance HL to string length data... | ||
| 28211 | LD A,(HL) | ...and load into A | ||
| 28212 | INC HL | Advance HL to first byte of string | ||
| 28213 | PUSH HL | Store HL (pointer to first byte of room name string) | ||
| 28214 | ADD A,4 | Add 4 to the string's length to accommodate space, and "bar cap" characters (chars. 35 and 36) before and after... | ||
| 28216 | LD B,A | ...and load value into B | ||
| 28217 | LD A,32 | Load A with width of screen (characters) minus length of room name string, spaces and bar caps... | ||
| 28219 | SUB B | ... | ||
| 28220 | RRCA | Divide value by two... | ||
| 28221 | AND 31 | ...and cap at 31 | ||
| 28223 | LD C,A | Load this value (length of one half of room name bar) into BC... | ||
| 28224 | LD B,0 | ... | ||
| 28226 | LD HL,16576 | Point HL at top pixel row of character block at coordinates (0, 6) | ||
| 28229 | ADD HL,BC | Add value in BC as offset... | ||
| 28230 | LD (54110),HL | ...and load this address into bitmap virtual text cursor | ||
| 28233 | LD HL,22720 | Point HL at attribute file address for character coordinates (0, 6) | ||
| 28236 | LD DE,22721 | Point DE at attribute file address for character coordinates (1, 6) | ||
| 28239 | LD BC,31 | Set repeat count to 31 | ||
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The value at 23695 is initially 71 (as set by instruction at 28174) and may have been changed to a new value as specified in room name entry in table at 42765
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| 28242 | LD A,(23695) | Load A with attribute stored at 23695 | ||
| 28245 | LD (HL),A | Fill entire row in attribute file with this attribute value... | ||
| 28246 | LDIR | ... | ||
| 28248 | LD HL,42160 | Point HL at text code for SPACE followed by room name bar end cap (right) | ||
| 28251 | CALL 34733 | Print text at location HL to screen using full screen width | ||
| 28254 | POP HL | Restore HL (pointer to first byte of room name string) | ||
| 28255 | CALL 34733 | Print text at location HL to screen using full screen width | ||
| 28258 | LD HL,42163 | Point HL at text code for room name bar end cap (left) followed by SPACE | ||
| 28261 | JP 34733 | Print text at location HL to screen using full screen width and return | ||
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