Turbo Pascal had more tricks, it could compile to memory (at least in version 5, if memory serves well). Mind you, not a RAM disk, it could compile and run a M

Turbo Pascal had more tricks, it could compile to memory (at least in version 5, if memory serves well). Mind you, not a RAM disk, it could compile and run a MSDOS .COM file from memory itself. Following the filenames during compilation was difficult, as they passed so fast (20Mhz 386sx with 2MB). The compilers and IDEs from that era were truly pieces of art. I also remember TopSpeed Modula-2 that also included its own task scheduler for real time DOS (using clock interrupts, I guess).