sdltrs is a Radio Shack TRS-80 Model I/III/4/4P emulator for Macintosh OSX, Windows, and Linux. It has been ported from the excellent X-Windows UNIX emulator xtrs. Instead of using the X-Window system for graphics, it uses the portable SDL library.
Tried Model 1 (NEWDOS) and Model 4p (LDOS and CP/M). Clearly a very good emulator. Used a lot the CP/M 2.2 emulation for Model 4p (Mbasic, F80, MASM 89 etc ...) Brought me back to the late 70's To run a MSBASIC program under CP/M on my iMac quad core i7 was a treat. Thank you.