GEC 4190

The 4190 was basically a hardware tidy up of the 4090. The old 4082/4085 external memory crates for a 4Mb 4090 system required several 6 foot tall 19" racks, and this was all replaced with internal memory on the 4190 (using the same 32bit memory boards as the GEC Series 63). This enabled the system to address up to 16Mb of main memory. The instruction set and appearance of the machine was unchanged from the 4090 (except for loss of external memory racks).