I was able to see the development card in person at VCF Midwest last year; it's a very neat project! The version he had at VCFMW was in a transparent plastic case[1], which looks even better than the IBM-inspired design of the one on this page.
If you want to refresh an old memory, it actually stands for "Personal Computer Memory Card International Association" but nobody knew that. And it was later called 'PC Card'... then there was the faster ExpressCard that wasn't backwards compatible.
It was fun being able to expand your computer's IO capabilities by adding on a network card, modem, USB, FireWire, etc. with these modules. It's similar to Framework's little USB-C-based modules, though those modules are just too small for a lot of circuits without a very creative design.
[1] https://youtu.be/hF0NKvmQmVA?t=47 (I couldn't find a good picture elsewhere)
Edit - I found this video on his YouTube channel with more info (with the latest version of the card): https://www.youtube.com/watch?v=e-04EoGlayY
It was fun being able to expand your computer's IO capabilities by adding on a network card, modem, USB, FireWire, etc. with these modules. It's similar to Framework's little USB-C-based modules, though those modules are just too small for a lot of circuits without a very creative design.
PCMCIA and PC Card = ISA
CardBus = PCI and ISA - slot was backwards compatible so you could use a PC Card in a CardBus slot
ExpressCard = PCIe
I have an old Thinkpad and had a similar idea for wifi, but I was thinking about MiniPCI.
Emulating NE2000 is great :)