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The BCPL runtime environment was completely alien compared to C's and a fair bit of glue was needed to get the DOS portion to talk to the rest of the system. I

The BCPL runtime environment was completely alien compared to C's and a fair bit of glue was needed to get the DOS portion to talk to the rest of the system. I reverse-engineered the "echo" command - the simplest of them all - to see what was actually involved. https://wandel.ca/homepage/execdis/echo_disassembly.txt https://wandel.ca/homepage/execdis/echo_disassembly.txt

kstrauser 2y ago
What the devil?!
amiga386 2y ago
Fascinating compiler glue from a bygone era. You'll be pleased to know the 2.0 version of echo makes standard dos.library calls like ReadArgs() Output() FWrite() FPutC(..., '\n') on a typical run. They exposed all the internals as documented API calls.