User`s manual

Rastergraf
3-4 Programming On-board Devices
Block Diagram
Borealis is partitioned into the following functional sections:
• Host Bus Interface
• Aperture Controller
• Drawing Engine
• CRT Controller
• Memory Controller
• Internal VGA
• Internal RAMDAC
Figure 3-1 Borealis Block Diagram
Host Bus
Interface
CRT
Controller
Memory
Controller
PXD[127:0]
CJ[15:0]
BLANK
HSYNC
AD[31:0] CAS
HBCLK
RST
CNTRL[6:0]
ADR[11:0]
WE
VSYNC
CRTclk
DQM[15:0]
SF
MCLK
Display
List
Processor
Linear
Controller
BE[3:0]
CS[0,2]
Internal
RAMDAC
Windows
RAS
PD[7:0]
PA[7:0]
DDC, DDA
RED
GREEN
BLUE
Engine
Drawing
2D/3D
VGA