How to get more than 640K RAM in a PC or XT

For years, I thought that it was impossible to access any more than 640K ‘Conventional’ RAM on my PC or XT. I was wrong. This time on Al’s Geek Lab, we see why and how the PC only addressed 640K, as well as how to take it up to 1MB without any major work.

MicroRAM card from Monotech Vintage PCs: https://monotech.fwscart.com DOSMAX / SHELLMAX Utility: https://www.pcorner.com/list/UTILITY/… USE!UMBS: http://www.vcfed.org/forum/showthread…