Line Drawing Registers - Fujitsu MB86R02 Jade-D Hardware Manual

MB86R02 'Jade-D' Hardware Manual V1.64
18.11.8

Line drawing registers

Each register is used by the drawing commands. The registers cannot be accessed from the CPU or
by using the SetRegister command.
(Coordinates setting register)
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
Register Address
LPN 0140 0 0 0 0
H
LXs 0144 S S S S
H
LXde 0148 S S S S S S S S S S S S S S S Int
H
LYs 014c S S S S
H
LYde 0150 S S S S S S S S S S S S S S S Int
H
LZs 0154 S
H
LZde 0158 S
H
Address Offset from DrawBaseAddress
S Sign bit or sign extension
0 Not used or 0 extension
Int Integer or integer part of fixed point data
Frac Fraction part of fixed point data
Sets coordinates parameters for line drawing
LPN Pixel count of principal axis direction
LXs X coordinates start position of draw line
(In principal axis X) Integer value of X coordinates rounded off
(In principal axis Y) X coordinates in form of fixed point data
LXde Inclination data for X coordinates
(In principal axis X) Increment or decrement according to drawing direction
(In principal axis Y) Fraction part of DX/DY
LYs Y coordinates start position of draw line
(In principal axis X) Y coordinates in form of fixed point data
(In principal axis Y) Integer value of Y coordinates rounded off
LYde Inclination data for Y coordinates
(In principal axis X) Fraction part of DY/DX
(In principal axis Y) Increment or decrement according to drawing direction
LZs Z coordinates start position of line drawing line
LZde Z Inclination
Int
Int
Int
Int
Int
0
Frac
Frac
Frac
Frac
Frac
Frac
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