> Amiga also doesnt fit the profile, seeing most models shipped with unified shared memory (chip ram).
What profile? They did RAM to RAM DMA transfer exactly for video acceleration with the Agnus chip, which would access memory through DMA channels to perform 2D blitting.
c-smile specifically said 'RAM to VRAM'. Agnus/Alice didnt have DMA access to _non video_ ram so Amiga is automatically out.
What I think he was thinking about was Blitter in general, and not particular implementations using DMA controller. First Blitter accelerated 2D graphics I read about were done on Xerox Alto using microcode.
I'm arguing from the point of view that 'VRAM to VRAM' (or maybe "shared I/O RAM" in Amiga's case) is a subset of 'RAM to VRAM'. You seem to be arguing from the point of view that just "RAM" in this context means non-video RAM. That's a fair assumption, and I understood it from your last post, but I don't think the difference is significant to the general point that we've had various forms of DMA-based 2D video acceleration for a long time.
What profile? They did RAM to RAM DMA transfer exactly for video acceleration with the Agnus chip, which would access memory through DMA channels to perform 2D blitting.