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Routines |
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Select font parameter handler. Called on the byte immediately following a 1A control code. Copies the six-byte font configuration for the selected font index (00–03) from the table at FontConfig_Table into the font state at 800C and loads the font bitmap pointer into 8008.
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| PrintHandler_SelectFont | 8EC7 | LD B,$04 | B=04 (mask limit: font indices 00–03). | |
| 8EC9 | CALL PrintHandler_MaskParam | Call PrintHandler_MaskParam to reset PrintState_Handler and mask B to the font index. | ||
| 8ECC | LD H,$00 | H=00. | ||
| 8ECE | LD L,B | L=B (font index as a 16-bit value in HL). | ||
| 8ECF | LD DE,$8FE6 | DE=FontConfig_Table (font configuration table base). | ||
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Multiply the font index by 08 (the size of each font table entry) to compute the byte offset into the font table.
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| 8ED2 | ADD HL,HL | Multiply HL by 08 (three left shifts). | ||
| 8ED3 | ADD HL,HL | |||
| 8ED4 | ADD HL,HL | |||
| 8ED5 | ADD HL,DE | HL=FontConfig_Table + (font index × 08) — pointer to the selected font entry. | ||
| 8ED6 | LD DE,$800C | DE=800C (font state destination). | ||
| 8ED9 | LD BC,$0006 | BC=06 (six bytes of font configuration to copy). | ||
| 8EDC | LDIR | Copy six bytes of font configuration to 800C–8011. | ||
| 8EDE | LD E,(HL) | Read the two-byte font bitmap pointer from bytes 07–08 of the entry. | ||
| 8EDF | INC HL | |||
| 8EE0 | LD D,(HL) | |||
| 8EE1 | LD ($8008),DE | Write the font bitmap pointer to *PrintState_FontPtr. | ||
| 8EE5 | RET | Return. | ||
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