procedure eeprom_877_read (byte in eeadr, byte out eedata) is bank_0 asm movf eeadr,w bank_2 asm movwf f877_eeadr bank_3 eecon1_eepgd = off eecon1_rd = on bank_2 asm movf f877_eedata,w bank_0 asm movwf eedata end procedure procedure eeprom_877_write ( byte in eeadr, byte in eedata ) is bank_0 asm movf eedata, w bank_2 asm movwf f877_eedata bank_0 asm movf eeadr, w bank_2 asm movwf f877_eeadr bank_3 asm bcf f877_eecon1,eecon1_eepgd asm bsf f877_eecon1,eecon1_wren asm bcf INTCON,intcon_gie asm bcf INTCON,intcon_gie assembler movlw 0x_55 movwf f877_eecon2 movlw 0x_aa movwf f877_eecon2 end assembler asm bsf f877_eecon1,eecon1_wr asm bsf INTCON,intcon_gie asm bcf f877_eecon1,eecon1_wren while eecon1_wr loop end loop bank_0 end procedure
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