[HN Gopher] Advanced Amiga Architecture (June 18, 1992)
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       Advanced Amiga Architecture (June 18, 1992)
        
       Author : doener
       Score  : 27 points
       Date   : 2023-04-30 21:23 UTC (1 hours ago)
        
 (HTM) web link (archive.org)
 (TXT) w3m dump (archive.org)
        
       | transfire wrote:
       | Shame.
        
       | doener wrote:
       | Via http://amiga-news.de/en/news/AN-2023-04-00114-EN.html
        
       | mjg59 wrote:
       | For context: this document describes the design goals for the
       | successor chipset to the AGA chipset shipped in the Amiga 1200
       | and 4000. If you watch the Deathbed Vigil video of the last day
       | at Commodore there's a brief shot of a prototype, but this never
       | made it to production before Commodore folded.
        
       | rodgerd wrote:
       | It's interesting to me that one of the big ideas that made the
       | Amiga different was having a unified memory (the chip memory)
       | where the specialised processors and CPU had equal access; it's
       | now very mainstream in the gaming arena, with the XBox and
       | PlayStation both using AMD processors that do just that.
        
         | Veliladon wrote:
         | It's pretty different compared to the Amiga. The Amiga flipped
         | the bus between CPU and chipset every cycle and the CPU could
         | only access chip RAM every 1/2 cycles. No matter how little the
         | chipset was doing, the CPU could only access RAM half the time.
         | The Xbox/PS5 SoCs have both the CPU and GPU behind the memory
         | controller so even under load the CPU will still have access to
         | its full amount of memory bandwidth.
        
       | AndrewStephens wrote:
       | I would have killed to have access to this document at the time.
       | Amiga documentation was very hard to come by in New Zealand.
        
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       (page generated 2023-04-30 23:00 UTC)