[comp.sys.hp] How many bits are in the PA-Risc chip

bill@hpb.cis.pitt.edu (Bill Broadly) (06/14/91)

	I called a Hp saleman and he wasn't very helpful.
	Anybody out there now the internal size of the PA-Risc chip
data and instruction paths are?
	I.e. 8086 16 bit processor. 80386 is a 32 bit processor.
	I have the documentation i.e. cache and bus widths.
	What about the internal registers etc.

		-Thanks for any info,
		-Bill
-- 
Bill Broadley
Broadley@schneider3.lrdc.pitt.edu
			"GISMO"

paul@prcrs.prc.com (Paul Hite) (06/15/91)

In article <139068@unix.cis.pitt.edu>, bill@hpb.cis.pitt.edu (Bill Broadly) writes:
> 
> 	Anybody out there now the internal size of the PA-Risc chip
> data and instruction paths are?

From the Hewlett-Packard Journal Sept 1987, Vol 38 Number 9 page 12:

	"The execution unit [of an HP Precision Architecture cpu] produces
	32-bit results for the arithmetic, logical, extract, and deposit
	instructions."

page 14:

	"All components of the data path are 32 bits wide."

Paul Hite   PRC Realty Systems  McLean,Va   paul@prcrs.prc.com    (703) 556-2243
    "We are trying to bring up an Air Traffic Control display on an X window 
      terminal and there seems to be some problems." -- from comp.windows.x

stuartj@hpfcse.HP.COM (Stuart Jarriel) (06/27/91)

The  7X0 series uses a 64 bit FPU, which is a change from the
1987 specs (PA87 vs PA89).  That is why single precision and 
double precision are the same performance on the 700's.