Editing IBM PALM processor (section)

=== Native PALM ISA Word Size ===

Native PALM instructions are '''16-bit halfwords'''. An older internet rumour (preserved in the Wikipedia talk page) claims that the control ROS on the PALM card itself is "32 bits wide" internally — but this claim cannot be confirmed in any primary source the wiki has access to. The SY31-0405-3 MIM describes the control ROS unit functionally but does not state its width. '''Treat the "32-bit internal microcode" figure as unverified.''' What is verified is that the ISA exposed to the executable ROS and to GENASM-generated PALM programs is the 16-bit halfword instruction set documented in IBM "Chapter 2" and in SY31-0405-3 Appendix C.