In one of the photos there's a shot of a TRS-80 model 1, level II, with expansion interface and three drives. Microsoft did the BASIC ROM for that machine in Z8

In one of the photos there's a shot of a TRS-80 model 1, level II, with expansion interface and three drives. Microsoft did the BASIC ROM for that machine in Z80, as they did with a number of Micros. Full floating point version in 12k. I cut my programming teeth on that in 1979 in BASIC and assembler. They also did a cut down version of BASIC for the Model 1, Level 1 machine, without floating point and single letter variables A-Z (!) It had just two string variables A$ and B$. It had precisely three error messages: "How?", "What?" and "Sorry". They squeezed that into a 4K ROM.