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|    comp.sys.apple2    |    Discussion about Apple II micros    |    56,720 messages    |
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|    Message 55,694 of 56,720    |
|    Anthony Ortiz to All    |
|    VidHD - bus snooping?    |
|    13 Aug 22 08:35:38    |
      From: anthonypaulo@gmail.com              There's this very cool card I was reading up on called the VidHD, and it seems       to work by snooping on the bus. I thought the Address bus was uni-directional!       Does anyone have any info on what exactly it's doing? I thought to read       anything off the bus you        needed to perform DMA, and I had no idea you could read the address off the       bus, I thought you could only drive it. If someone could point me to the       technical aspects of how it's doing what it's doing I'd appreciate it.              Many thanks in advance!              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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