The Avalon Modular is a transputer which plugs into an Zorro II or Zorro III slot. Because of its modular design a variety of transputer modules can be used with the unit, for example:
T800 with 1MB , 4MB or 8MB DRAM
T800 with 128K, 1MB or 2MB of 0 wait-state SRAM
T800 with 2MB DRAM and 32K of 0 wait-state SRAM (double width module)
T800 with 4MB DRAM and 128K of 0 wait-state SRAM (double width module)
T801 with 160K of 0 wait-state SRAM (double width module)

The Avalon Modular is compatible with INMOS B008. This allows a maximum of 10 T800's to be mounted onto a single card and is recommended for use with the Visiona graphics card. The following software was available for the Avalon Modular:
Transputer-Assembler with an Amiga specific set of commands and libraries
Parallel-C Compiler
HELIOS (Operating System for Transputers)
The INMOS development system
Raytracing Application
Miranim, a script oriented animation system using the Cinemira 2 language.
Marashading
Sabrina, a 24bit 3D modelling package.

Thanks to Gareth Knight (Amiga History Guide)