The wiki mentions:
Is that a missing register number?
Code:
CHR Mode is set by the following:
$D000: [SRNC CPPP]
R,N = Relate to Mirroring (see mirroring section for details)
S,P = Relate to PRG (see prg setup for details)
C = CHR Mode
$ : [M.BH HHHH]
M = Mirror CHR (very strange, see below)
B = CHR Block mode (0=enabled, 1=disabled)
H = CHR Block (when in block mode)
$D000: [SRNC CPPP]
R,N = Relate to Mirroring (see mirroring section for details)
S,P = Relate to PRG (see prg setup for details)
C = CHR Mode
$ : [M.BH HHHH]
M = Mirror CHR (very strange, see below)
B = CHR Block mode (0=enabled, 1=disabled)
H = CHR Block (when in block mode)
Is that a missing register number?