Acer Aspire one 521 Series, Service Manual, Page: 28 / 177

18 Chapter 1
Item (NB Cont.) Specification
Features • New multi-level texture cache to give optimal performance,
greater than 8x the previous designs.
• High efficiency ring bus memory controller:
• Programmable arbitration logic maximizes memory efficiency,
software upgradeable.
• Fully associative texture, color, and Z cache design.
• New hierarchical Z and stencil buffers with early Z Test.
• New lossless Z-buffer compression for both Z and stencil.
• Fast Z-Buffer Clear.
• Z cache optimized for real-time shadow rendering.
• Z and color compression resources virtualized to a 32-bit
addressing space, for support of multiple render targets and
textures simultaneously.
Motion Video Acceleration Features
• Video scaling and fully programmable YCrCb to RGB color
space conversion for full-speed video playback and fully
adjustable color controls.
• Adaptive de-interlacing eliminates video artifacts caused by
displaying interlaced video on non-interlaced displays, and by
analyzing image and using optimal de-interlacing function on a
per-pixel basis.
• H.264 implementation is based on the ISO/IEC 14496-10 spec.
• VC-1 implementation is based on the SMPTE 421M spec.
• For the RS880MC: MPEG-2 decode acceleration for SD
contents:
• Hardware motion compensation.
• Hardware Inverse Discrete Cosine Transform.
• Multiple Display Features
General
• Resolution, refresh rates, and display data can be completely
independent for the two display paths.
• ¡E Each display controller supports true 30 bits per pixel
throughout the display pipe.
• ¡E Each display path supports VGA and accelerated modes,
video overlay, hardware cursor, hardware icon, and palette
gamma correction.
• Supports both interlaced and non-interlaced displays.
• Full ratiometric expansion ability is supported for source desktop
modes up to 1920 pixels/line.
• Maximum DAC frequency of 400 MHz.
• Supports 8, 16, 32, and 64-bpp depths for the main graphics
layer:
• For 32-bpp depth, supports xRGB 8:8:8:8, xRGB 2:10:10:10,
sCrYCb 8:8:8:8, and xCrYCb 2:10:10:10 data formats.
• For 64-bpp depth, supports xRGB 16:16:16:16 data format.
• Independent gamma, color conversion and correction controls
for main graphics layer.
• Support for DDC1 and DDC2B+ for plug and play monitors.
• 8-bit alpha blending of graphics and video overlay.