Z90251 Datasheet, PDF (52/97 Pages) Zilog, Inc. – eZVision 200 Television Controllers with OSD

Z90255 ROM and Z90251 OTP
32 KB Television Controller with OSD
44
Table 23 VRAM Structure and Memory Map (Continued)
Character Code Data Bit[11] ,
Character Color C[2:0]
Character Code Data Bit[7:0]
Row 6 D[11:8]
FEC1h
FED8h
Row 6 Video RAM buffer
FCC0h
FCC1h
FCD8h
Row 7 D[11:8]
FEE1h
FEF8h
Row 7 Video RAM buffer
FCE0h
FCE1h
FCF8h
Row 8 D[11:8]
FF01h
FF18h
Row 8 Video RAM buffer
FD00h
FD01h
FD18h
Row 9 D[11:8]
FF21h
FF38h
Row 9 Video RAM buffer
FD20h
FD21h
FD38h
Hardware processes the entire 12 bits of data at the same time it processes the
OSD.
The Color Palette Selection Bits (10-8) are decoded as described in Table 24.
PS001301-0800