Velnor's Lair: Data at FF58

FF58: User-Defined Graphics

The default UDGs copied from the ROM. Line 6035 later overwrites the first 10 bytes with a short attribute-clear routine (`LD HL,$5800; LD BC,$0003; LD A,$38; LD (HL),A; INC HL; DJNZ; DEC C; JR NZ; RET`), and line 6330 calls it with `RANDOMIZE USR 65368`.
UDG	FF58	DEFB $00,$3C,$42,$42,$7E,$42,$42,$00
	FF60	DEFB $00,$7C,$42,$7C,$42,$42,$7C,$00
	FF68	DEFB $00,$3C,$42,$40,$40,$42,$3C,$00
	FF70	DEFB $00,$78,$44,$42,$42,$44,$78,$00
	FF78	DEFB $00,$7E,$40,$7C,$40,$40,$7E,$00
	FF80	DEFB $00,$7E,$40,$7C,$40,$40,$40,$00
	FF88	DEFB $00,$3C,$42,$40,$4E,$42,$3C,$00
	FF90	DEFB $00,$42,$42,$7E,$42,$42,$42,$00
	FF98	DEFB $00,$3E,$08,$08,$08,$08,$3E,$00
	FFA0	DEFB $00,$02,$02,$02,$42,$42,$3C,$00
	FFA8	DEFB $00,$44,$48,$70,$48,$44,$42,$00
	FFB0	DEFB $00,$40,$40,$40,$40,$40,$7E,$00
	FFB8	DEFB $00,$42,$66,$5A,$42,$42,$42,$00
	FFC0	DEFB $00,$42,$62,$52,$4A,$46,$42,$00
	FFC8	DEFB $00,$3C,$42,$42,$42,$42,$3C,$00
	FFD0	DEFB $00,$7C,$42,$42,$7C,$40,$40,$00
	FFD8	DEFB $00,$3C,$42,$42,$52,$4A,$3C,$00
	FFE0	DEFB $00,$7C,$42,$42,$7C,$44,$42,$00
	FFE8	DEFB $00,$3C,$40,$3C,$02,$42,$3C,$00
	FFF0	DEFB $00,$FE,$10,$10,$10,$10,$10,$00
	FFF8	DEFB $00,$42,$42,$42,$42,$42,$3C,$00