Just curious, is F'WEB actually using the video RAM for VPD related stuff, or is it used as buffers for data that it would be more natural to store in CPU RAM? Could SAMS have been used instead?
The SAMS came along later long after the Digit and other VDP 9938 and 9958 cards had been introduced, but was a rage.
Let us face facts the TI uses VDP for a buffer thus you are limited to 12K most of the time for loading and saving program chunks.
With a limited size for buffer size any RAM would be forced down that very small buffer as a result.
The only other option is to make the file size 255 bytes and take forever to load a say 4Meg SAMS.
Want to fix the issue for both.....9938 with 128K VDP and use 64K chunks of VDP instead of just 12K at most.