The amazing 6502 support chip: The 6532 RIOT!

In this video I take a quick look at the MOS 6532 RIOT support chip for the 6502 microprocessor.

Photo credits:
KIM-1 photo

Atari 2600 photo and Atari 2600 Jr Motherboard
Evan-Amos, Public domain, via Wikimedia Commons

[DougDingus]

There was no read / write signal on the 2600 cartridge interface.

The designers felt 128 bytes was enough!

[johnsaller]

I would like to see how the io and timers work for the 6532. This video came up at the perfect time as I was playing with the 6532 from an old 2600 to see if I could use it to diagnose 16k/64/256x1 dram in circuit. It has been a pain trying to test dram without using stack or zpage. I need to find which chips are bad and currently can find one chip only if bad. Replace it then run for find the next. This might be enough ram to do the job and has io to show which line(s)/chip(s) it might be!

[mheermance]

It has a great name for an IC. Personally I have never used one, but 128 bytes seems really crowded. Plus you have to choose between page zero or page one. That's a tough choice.

[edgeeffect]

A 6502 microcontroller with just 2 chips would have been wonderful.

[stelleratorsuprise]

I once used a 'support chip' providing RAM, FlashROM, glue logic and some I/O, it would have been the dream for all people using 8-Bitter but I forgot the name.

[ivvil]

Like the video, but I think the pacing could be faster. Expecting more videos from you!

[NickLinneyDev]

What application are you using at 8:52?

[Xpun]

So can I use just those 2 chips to run CP/m & or BASIC with a keyboard & monitor then ? Or would I still need other chips ? If so & I'm sure I will need more. What chips then ?
Im brand new to breadboard computing & trying to figure that all out.