To clarify: did any of the mask ROM or discrete IC vendors make and sell ROMS (or effective ROMs optimized by giant Karnaugh map) with fixed non-proprietary contents that could be used in building a circuit from stock, in addition to the normal custom ROMs.
A primary application would have been pre computed look-up-tables of really any common single-variable function.
- A 64x8 ROM holding a quarter of a sine wave, or a "256x8" holding the full circle.
- A ROM converting integer n to ln(n) and a companion converting fixed-point m to e^m.
There seem to be some 74-series chips that could be interpreted this way according to the listing on Wikipedia.
- 74408 - 8-bit parity tree
- 74630-35 - Error detection and correction chips
But these seem to be the exception rather than the rule and are likely to be much more efficient in practice.
If catalog stock ROMs were never sold why weren't they? What made them a bad fit for applications that could use them but couldn't justify custom silicon?