Please use the "normal" Precise Puppy, unless you have a specific need for Retro-Precise.
The "normal" Precise Puppy requires an i686 (or greater) CPU that is PAE-capable.
Some early Pentium CPUs, such as some of the Intel Pentium-M series, are
not PAE-capable. All later CPUs are, including those made by AMD.
Those Pentium-M's were manufactured around 1995 I think.
If you try to boot the "normal" Precise Puppy on one of the PAE-incapable CPUs, it will fail to boot.
Some other differences
- Retro does not have the 'nouveau' open source nVidia driver. The simpler X.org 'nv' driver is present.
- Retro is able to boot from true SCSI hard or optical drives, as it has SCSI drivers in the initrd. The "normal" Precise does not have any true-SCSI drivers.