In mid-1990, Apple chose the Motorola 88110, an as yet unfinished chip that combined the 88100 CPU and 88200 FPU into a single package. For the rest of the year, Apple's engineers developed a 68k emulator that would work with this future chip. This project became known as "RLC", short form "RISC LC", a play on the name of Apple's upcoming Macintosh LC computer. By January 1991, the engineering team had produced a prototype of a Macintosh LC with its 68020 CPU being swapped out for an 88100 and a 68020 emulator. This prototype was able to use an unmodified Macintosh Toolbox ROM and could boot into System 7. A few months later, a second prototype was created, utilizing a Macintosh IIsi case with the now-completed Motorola 88100 chip.