10BB: 3E 04       ld   a,$04
10BD: D3 1D       out  ($1D),a			; 1d = 04

10BF: 01 FF 1F    ld   bc,$1FFF
10C2: 21 00 C0    ld   hl,$C000
10C5: 11 01 C0    ld   de,$C001
10C8: 3E 01       ld   a,$01
10CA: D3 17       out  ($17),a			; 17 = 01
10CC: 77          ld   (hl),a			; write c000
10CD: ED B0       ldir
10CF: 4F          ld   c,a				; c = 01

10D0: CB 27       sla  a
10D2: D3 17       out  ($17),a			; 17 = 02
10D4: 11 00 20    ld   de,$2000
10D7: 21 00 C0    ld   hl,$C000

10DA: 7E          ld   a,(hl)			; read c000
10DB: B9          cp   c
10DC: 20 17       jr   nz,$10F5			; error if not matched (c000-dfff)

10DE: CB EC       set  5,h				; hl = e000
10E0: 7E          ld   a,(hl)
10E1: CB AC       res  5,h				; hl = c000
10E3: B9          cp   c
10E4: 20 0F       jr   nz,$10F5			; error if not matched (e000-ffff)

10E6: CB 26       sla  (hl)				; c000 = 02
10E8: 23          inc  hl
10E9: 1B          dec  de
10EA: 7B          ld   a,e
10EB: B2          or   d
10EC: 20 EC       jr   nz,$10DA			; next value

10EE: CB 21       sla  c
10F0: 79          ld   a,c
10F1: 30 DD       jr   nc,$10D0			; next ?
10F3: 18 06       jr   $10FB

; ram error
10F5: ED 57       ld   a,i
10F7: F6 04       or   $04
10F9: ED 47       ld   i,a
10FB: C9          ret