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- Path: idt.unit.no!alfw
- From: alfw@idt.unit.no (Alf Inge Wang)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: AgaEXTENDER: A device to allow fast 24bit gfx on AGA
- Date: 25 Mar 1996 13:18:37 GMT
- Organization: Norwegian University of Science and Technology, Trondheim, Norway
- Distribution: world
- Message-ID: <4j66fd$skg@due.unit.no>
- References: <36453.6656T17T1818@mbox.vol.it>
- NNTP-Posting-Host: taks.idt.unit.no
-
- In article <36453.6656T17T1818@mbox.vol.it>, bizzetti@mbox.vol.it (Fabio Bizzetti) writes:
- |> Subject: AgaEXTENDER.
- |> Author:
- |> Fabio Bizzetti, via Fra' Giarratana 62/c, 93100 Caltanissetta, Italy
- |> fax/voice: +39 934 27220 / email: bizzetti@mbox.vol.it
- |>
- |> (c) copyright 1996 by Fabio Bizzetti. All rights reserved.
-
- |> The aim of this project is to improve drastically the performances of AGA
- |> Amigas (possibly also OCS/ECS), extended to both future and old Amigas,
- |> with the minimum efforts possible, both commercial and technological.
- |>
-
- ...
-
- |> The AgaEXTENDER is a device to plug-in the RGB port of old Amigas, and to be
- |> integrated in the motherboard of future Amigas. It is based on a line-buffer
- |> device, much cheaper than frame-buffer.
- |>
- |> The whole AgaEXTENDER's work-cycle is based on a horizontal line, starting
- |> from an Horizontal Synch and temporized via both the PixelClock output and
- |> the 28Mhz clock (doubled internally to 56Mhz) for other purphoses.
- |>
- |> A brief description of its features and performances:
- |>
- |> # ChipMem->RGBport bandwidth of more than 22Mb/sec allowing i.e. such modes:
- |> a) 24 bit (R,G,B byte based or 3 byteplanes) up to about 512*290 in PAL/DBLPAL
- |> or 512*580 PAL interlaced (with or without overscan).
- |> b) 24 bit (A,R,G,B longword based) up to 384*290 in PAL/DBLPAL or 384*580 PAL
- |> interlaced (with or without overscan), becoming 768*580 with hardware
- |> antialiasing enabled (linear interpolation).
- |> c) 15 bit (word based) resolution up to 1024*290 in PAL/DBLPAL or 512*580 PAL
- |> interlaced (with or without overscan).
- |> d) YUV (8+8+8 byteplanes based) resolution up to about 512*290 in PAL/DBLPAL
- |> or 512*580 PAL interlaced (with or without overscan).
- |> e) YUV (6+5+5 word based) resolution up to 1024*290 in PAL/DBLPAL or 1024*580
- |> PAL interlaced, or 512*580 DBLPAL (with or without overscan).
- |> f) 8 bit (classic chunky mode) resolution up to 512*290 with 4 PlayFields.
- |> f) 16 bit (YUV or RGB chunky mode) resolution up to 256*290 with 4 PlayFields.
- |> g) 8 bit chunky mode for OS, resolution 768*600 31Khz 50Hz
- |> Scale (Zoom) effects on the playfields. Full hardware smooth scroll support.
- |> Many other video modes, completely programmable by skilled coders.
- |> # Full OS support (draggable screens and AGAnormal/AGAextended together).
- |> # Hardware completely programmable via 256 registers.
- |> # HiRes-copper, for advanced effects/modes.
- |> # Antialiasing both horizontal and vertical. Fully programmable pixel rate.
- |> # Support for fast MPEG/JPEG display, due to built in YUV conversion and more.
- |> # 16bit 3D audio, extremely high playback rate, 4+4+4+4 (or more) channels.
- |> # Deinterlacer. No bandwidth waste (unlike scan doubled DBLPAL/DBLNTSC).
- |> # Extremely fast transparency effects.
-
-
- This could be the device that saves the Amiga's existance.... If this is possible it would enhance the Amiga's performance a lot...
-
- --
- _/_/Alf Inge Wang,_/_/_/_/_/ _/_/_/_/Amiga has been multitasking_/_/_/_/_/
- _/_/computer researcher _/_/ _/_/_/_/since 1985 with only 256K_/_/_/_/_/_/
- _/_/_/_/_/_/_/_/_/_/_/_/_/_/ _/_/Windows95 can do it in 1995 with 16MB_/_/
- Working for SINTEF,alfw@idt.unit.no,homepage:http://www.idt.unit.no/~alfw/
-