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Routines |
| Prev: E2B0 | Up: Map | Next: E2FA |
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Set up the message data, pointers and next character to print, in preparation before the print routine at E2FA.
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| E2D0 | LD DE,($EAA1) | Get address of message text to print | ||
| E2D4 | LD A,(DE) | Get the number of letters/characters in the message | ||
| E2D5 | LD ($EAA3),A | ...and store | ||
| E2D8 | LD ($EAA4),HL | Store the screen display address pointer | ||
| E2DB | INC DE | Point at the first letter/character to print | ||
| E2DC | LD ($EAA1),DE | ...and store address pointer | ||
| E2E0 | LD DE,($EAA1) | Get the message text address pointer | ||
| E2E4 | LD A,(DE) | Get the letter/character to print | ||
| E2E5 | INC DE | Move the pointer on to the next one | ||
| E2E6 | LD ($EAA1),DE | ...and store | ||
| E2EA | CP $1B | Is the character a line break (code 27)? | ||
| E2EC | JR NZ,$E2FA | If not, continue to print text | ||
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End of line character (27) encountered. Move down one character row and to the left hand position of the scroll. New screen display address calculated and stored.
As all printing is done in the bottom third of the screen, only the low byte of the screen display address needs changing.
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| E2EE | LD A,($EAA4) | Get the current screen display address low byte | ||
| E2F1 | AND $E0 | Reset the column number to 0 | ||
| E2F3 | ADD A,$28 | ...and add 40, thus moving down one row (32 characters) and right 8 characters, to the left hand side of the scroll, on the next row down | ||
| E2F5 | LD ($EAA4),A | Store the screen display address low byte | ||
| E2F8 | JR $E32C | ...and jump straight into the text print routine. | ||
| Prev: E2B0 | Up: Map | Next: E2FA |