Figure 8-1: Screen-Register Relationship, Split Screen - Epson S1D13704 Technical Manual

Page 64
(REG[0Dh], REG[0Ch]) Words
Image 1
Image 2
Where:
(REG[0Dh], REG[0Ch]) is the Screen 1 Start Word Address
BPP is Bits-per-Pixel as set by REG[02h] bits 7:6
REG[12h] is the Address Pitch Adjustment in Words
(REG[10h], REG[0Fh]) is the Screen 2 Start Word Address
(REG[14h], REG[13h]) is the Screen 1 Vertical Size
(REG[06h], REG[05h]) is the Vertical Panel Size
S1D13704
X26A-A-001-04
Line 0 Last Pixel Address + REG[12h] Words
Line 0
Line 1
Line=(REG[14h], REG[13h])
(REG[10h], REG[0Fh]) Words
8(REG[04h]+1) Pixels

Figure 8-1: Screen-Register Relationship, Split Screen

Consider an example where REG[14h], REG[13h]= 0CEh for a 320x240 display system.
The upper 207 lines (CEh + 1) of the panel show an image from the Screen 1 Start Word
Address. The remaining 33 lines show an image from the Screen 2 Start Word Address.
Line 0 Last Pixel Address=((REG[0Dh], REG[0Ch]) +
REG[12h] Words
Virtual Image
*
Epson Research and Development
Vancouver Design Center
×
(8(REG[04h]+1) BPP/16))
Words
((REG[06h], REG[05])+1) Lines
Hardware Functional Specification
Issue Date: 01/02/08