@80B7.ADF - Radius SVGA MultiView 
Windows Drivers and Utilities disks, courtesy of Mike Armstrong 
SVGA MultiView MC
ADF Sections

JP1- Possibly chooses between two BIOS ROM banks???
SW1 It says-
   2 ON - FULL PAGE DISPLAY
   2 OFF - MULTISYNC MONITOR
       I _assume_ this might mean BOTH on or off.
U18,19 BOTH are marked SVGA Multiview MC, V2.02 256K, -0050-02 A
U5 Sierra Semiconductor Mark2 SC11484 (15bit, 6/8bit DAC, overlay)

FastWrite Setting
   The FastWrite cache is used to reduce memory wait states to virtually zero on all memory writes.
        <"FastWrite Enabled">, FastWrite Disabled

Pure Mode Setting
   Pure Mode is used to emulate a pure IBM VGA with no extensions.  To enable access to Radius extensions, Pure Mode must be disabled.
        <"Extensions Enabled">, Extensions Disabled