ff4 dte routine

gistfile1.asm

arch snes.cpu; lorom	// Load settings for SNES/WDC65816 in LoROM mode

.org $00b4a2
	jsl check_codes_cont
	fill 3,$ff

.org $01ecb0
check_codes_cont
	cmp #$c3
	bne +
		jml $00b501
+;	jsl dte_routine::init
	rtl
	
namespace dte_routine
init
	cmp #$40		// DTE charcodes start here
	bcc end
	clc
	cmp #$80		// DTE charcodes end here
	bcs end

runcheck
	stx $fffe		// Backup X
	sec
	sbc #$40		// Start charcodes from 0, not 30
	clc
	ldx $ffff		// Load DTE Flagbyte from RAM
	cpx #$9d		// If this is set, we're at the 2nd char
	beq secondchar

firstchar
	ldx #$9d		// set flag to true
	dec $0772		// decrement load_idx
	asl a			// dte_num = charcode*2
	jmp base

secondchar
	asl a			// dte_num = charcode*2
	clc
	adc #$01		// select 2nd char of pair
	ldx #$00		// set flag to false

base
	stx $ffff		// store flag in RAM
	tax
	lda dte_table,x	// load character from DTE table
	ldx $fffe		// Restore X

end
	rtl