Philips TS1000 - page 11

9. Perform steps 5 and 6 again, making note of the amount of free memory shown on your remote. If the
number is approximately the same (plus/minus 1 percent), then you do in fact have an RC5000. If the
amount of free memory shown is GREATER (by about 33% for the file mentioned above) then you
do, in fact, have an RC5000i.
RC: Philips Pronto & Marantz RC5000 Unofficial FAQ 11