Amazing - a purely software rasterizer on 16MHz, no floating point, 16-bit data bus, at most 512k of RAM? That’s the original 68k! What’s everyone’s excuse for not getting SM64 running on a Macintosh Plus?
I guess you're probably joking, but in case there's any actual confusion:
ARM7 is fully pipelined, and GBA connects it to 32K of on-chip zero-wait-state SRAM, so it's possible for optimized code to approach 16 MIPS with 32-bit operations. The original 68K is a multi-cycle processor and Mac Plus runs it at 8 MHz, which tops out at more like 2 MIPS for 16-bit operations, less for 32-bit operations (the ALUs are only 16-bit).
ARM7 is fully pipelined, and GBA connects it to 32K of on-chip zero-wait-state SRAM, so it's possible for optimized code to approach 16 MIPS with 32-bit operations. The original 68K is a multi-cycle processor and Mac Plus runs it at 8 MHz, which tops out at more like 2 MIPS for 16-bit operations, less for 32-bit operations (the ALUs are only 16-bit).