Is this the 86Box? I found it fun reliving the time I got my Amstrad PC1512, I added two hard cards of 500MB and a 128k memory expansion to 640KB which made things a lot more fun. Back then I only had two 360KB floppies and added a 32MB hard card a few years later. I had Borland TurboPascal and Zortech C too. Fun times.
It will be interesting to try out Box64 as soon as I get my hands on some suitable RISCV hardware. I have played with RISCV microcontrollers they're quite nice to work with.