[TUHS] Happy birthday, John Backus!
tuhs at tkr.bondplaza.com
Wed Dec 5 02:24:17 AEST 2018
> On 4 Dec 2018, at 14:53, Clem Cole <clemc at ccc.com> wrote:
> On Tue, Dec 4, 2018 at 9:43 AM Noel Chiappa <jnc at mercury.lcs.mit.edu <mailto:jnc at mercury.lcs.mit.edu>> wrote:
> Which brings up an interesting query - I wonder when/what the last compiler written in assembler was?
> Excellent question -- IBM's Fortran-H maybe? circa mid 1970's would be my guess.
The Fortran H compiler was mostly written in Fortran: 27,415 lines of Fortran and 16,721 lines of assembler according to slide 12 of .
There were some language extensions (structures and pointers) to support this, enabled by the secret compiler option XL. They are described in Appendix J of the Program Logic Manual for the compiler .
The early-1980s Fortran 77 compiler for the GEC 4090 was written in Babbage, a thin PL/360-like veneer over the raw 4090 instruction set.
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