🚀 go-pugleaf

In article <5093@navy22.UUCP> koch@motcid.UUCP (Clifton Koch) writes:
>  It depends on how the refresh is implemented, on whether or not you'll
>find a performance difference.  A DMA channel is used on PCs (unfortunately)
>to refresh the DRAM.
>...
>If you expand memory by adding more
>banks of DRAM, whether on the motherboard or on an aboveboard memory card,
>the DMA controller has to hit more addresses so that each chip is refreshed,
>and therefore has to do more block moves in the same 4ms.

As I recall, PC memory boards are informed via the bus that a special
DMA on channel 0 is in progress, so they refresh all the rows of all
the chips at once rather than actually doing a DMA cycle.  Thus, the
PC's DMA only has to cycle 128 (or was it 256) times to refresh all the
memory regardless of the amount present.

It's _still_ a sucky way to do refresh.

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