Jim Bryant wrote: > > I really don't know how people get started with this. HP has _never_ stated > > that the chip will handle it; all they have stated is that HPUX applications > > will continue to be supported. > > > > I suggest you people go read comp.arch for a while; there's a fair bit of > > information cropping up there. For example, there's a wonderful thread > > going > > on about HP's previous experience with architecture emulation, including > > some > > interesting comments by people at HP. > > Well, the way I understand things, HP-UX 11 comes in two flavors, 32 > bits and 64 bits. I think that 32-bit code is handled in a legacy > emulation under 64 bit 11, I'd have to double check that though with > the book.
PA-8000 (PA-RISC 2.0 architecture) has harware support for the 32-bit (PA-RISC 1.1 architecture) instructions. It's configured by one of the bits in the status register. Alas, HP does not have the PA-RISC 2.0 specs online but they have a whitepaper describing the additions in a nutshell. But I guess internally the system calls are implemented as 64-bit. Speaking about Merced, the same thing is done in SCO/IBM Monterey-64, all the kernel including the implementation of the 32-bit system calls (the UnixWare IA-32 compatibility subsystem) works in the 64-bit mode. -SB To Unsubscribe: send mail to majord...@freebsd.org with "unsubscribe freebsd-hackers" in the body of the message
