You're right. I just read some stuff about that. It seems that the compaq portable III won't be able to enable the cache on a 486DLC. Also, I found an eBay seller offering TI 486DLC's for a little bit less than $50 with shipping to Hong Kong available:
https://www.ebay.com/itm/Texas-Inst...31194&_trksid=p2054502.c100227.m3827#shpCntId
I have a 486DrX2, but not sure if 20/40 or 33/66.....I can check and let you know
Hi Smack2k - someone has already reached out to me, just paid and now waiting for a 20/40. Thanks though!