I have built two Groza Excelgraph cards and both have similar font glitching and memory errors with all the bios' I have tried thus far. Here is a typical checkit output:

=== VIDEO RAM TEST ===

Test Results:
Video Memory................................................FAILED ***
ERROR at Address 0A0006h, Bits FEDCBA9876543210 Parity
ERROR at Address 0A000Ah, Bits FEDCBA9876543210 Parity
ERROR at Address 0A000Eh, Bits FEDCBA9876543210 Parity
ERROR at Address 0A0012h, Bits FEDCBA9876543210 Parity
ERROR at Address 0A001Ah, Bits FEDCBA9876543210 Parity
ERROR at Address 0A001Eh, Bits FEDCBA9876543210 Parity
ERROR at Address 0A0022h, Bits FEDCBA9876543210 Parity
ERROR at Address 0A002Ah, Bits FEDCBA9876543210 Parity
ERROR at Address 0A002Eh, Bits F.D.BA9876543210 Parity
ERROR at Address 0A0032h, Bits FEDCBA987654.210 Parity
ERROR at Address 0A003Ah, Bits .EDCBA.87.54321. Parity
ERROR at Address 0A003Eh, Bits FEDCBA.876.43210 Parity
ERROR at Address 0A0042h, Bits FEDCBA..7654321. Parity
ERROR at Address 0A004Ah, Bits F.DCBA.876543210 Parity
ERROR at Address 0A004Eh, Bits FEDCB.9..6543210 Parity
ERROR at Address 0A0052h, Bits FE.CB.98765.3210 Parity

Video Page Test (8 Pages)...................................Passed

*** END TESTS: 16 ERRORS ENCOUNTERED ***

I am considering a Magellan NGP build since iyatemu designed it with more contemporary RAM. Has anyone built one yet?