Is it possible to make an external VRAM expansion for VERA?

xanthrou · Post by **xanthrou** » Sun Nov 21, 2021 7:09 am

Wonder if THAT's possible to extend the VERA's VRAM externally.

Scott Robison · Post by **Scott Robison** » Sun Nov 21, 2021 7:23 am

VERA would need more address lines and data lines, and given what we've been told about it's limitation, I think the answer is no. But I Am Not An Expert(TM).

BruceMcF · Post by **BruceMcF** » Sun Nov 21, 2021 8:14 pm

A RAM expansion similar to the C64 REU would be possible, since it's possible for expansion cards to take over the bus.

Scott Robison · Post by **Scott Robison** » Sun Nov 21, 2021 8:23 pm

On 11/21/2021 at 1:14 PM, BruceMcF said:

A RAM expansion similar to the C64 REU would be possible, since it's possible for expansion cards to take over the bus.

But that wouldn't help VERA.

BruceMcF · Post by **BruceMcF** » Sun Nov 21, 2021 10:01 pm

On 11/21/2021 at 3:23 PM, Scott Robison said:

But that wouldn't help VERA.

A (preferably single cycle) DMA transfer into or out of Vera would be the closest you could come, as expanding the SPRAM module built into the FPGA is not going to happen.