My Color Computer came with 4k memory.
With great trepidation I cracked it and up graded to a whopping 64K
My first computer was an XT with an 8088 processor, 4.77 MHz, 640K ram, no hard drive, two floppy drives, and a dazzling 4-color display monitor (including white). No internet of course. I probably had more fun with that one than any others since.
Lucky guy.
I couldn’t afford that much memory awesomeness.
Which model of CoCo?
The last ones could go up to 512K and could support OS9 Level II, using a memory control device called a “GIME” chip. It would have been slightly more capable if Tandy had used Motorola’s 6829 memory mapping chip.
I had a couple different CoCos, including one marketed through Tandy. I did get OS9 level II running on it.
I have a couple of connections to those HW and SW products.
People are still supporting the CoCo, with advanced video and storage add-ons. There’s a couple of annual meetings of CoCo partisans, one of them near Chicago.