Drawing Mode Registers - Fujitsu MB86R02 Jade-D Hardware Manual

MB86R02 'Jade-D' Hardware Manual V1.64
18.11.6

Drawing mode registers

When write to the registers, use the SetRegister command. The registers cannot be accessed from
the CPU.
MDR0 (Mode Register for miscellaneous)
Register
DrawBaseAddress + 420
address
Bit number
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit field name
FS
R/W
R/W
Initial value
00
Bit 1 to 0 BSH (Bitmap Scale Horizontal)
Sets horizontal zoom ratio of bitmap draw
00
01
10
01
Bit 3 to 2 BSV (Bitmap Scale Vertical)
Sets vertical zoom ratio of bitmap draw
00
01
10
01
Bit 8 CX (Clip X enable)
Sets X coordinates clipping mode
0
1
Bit 9 CY (Clip Y enable)
Sets Y coordinates clipping mode
0
1
Bit 16 and 15 CF (Color Format)
Sets drawing color format
00
01
Bit 20 ZP (Z Precision)
Sets the precision of the Z value used for erasing hidden planes.
18-210
H
ZP
RW
0
x1
x2
x1/2
Reserved
x1
x2
x1/2
Reserved
Disabled
Enabled
Disabled
Enabled
Indirect color mode (8 bits/pixel)
Direct color mode (16 bits/pixel)
16 bits/pixel
8 bits/pixel
CF
CY CX
RW RW RW
00 0 0
BSV BSH
RW RW
00 00