H | Number of character we're interested in the visibility of |
27886 | 2E02 | LD L,2 | |
27888 | 56 | LD D,(HL) | Pick up the character's y-coordinate in D |
27889 | 2D | DEC L | |
27890 | 5E | LD E,(HL) | Pick up the character's x-coordinate in E |
27891 | 0E00 | LD C,0 | Prepare lower limit of 0 in case E<10 |
27893 | 7B | LD A,E | |
27894 | D60A | SUB 10 | |
27896 | 3801 | JR C,27899 | |
27898 | 4F | LD C,A | C=lower limit of range |
27899 | C614 | ADD A,20 | |
27901 | 47 | LD B,A | B=upper limit of range |
27902 | C9 | RET |