Volex TTX2000 S Issue 1.2: Unused RAM at 1C11

1C11: Unused

These unused bytes are left over from the OEL issue 2.3 ROM.
1C11	DEFB $CD,$1A,$FE,$4B,$C8,$FE,$6B,$C8
1C19	DEFB $21,$BE,$1E,$CD,$50,$1F