nand2tetris/NOTES.md

# NOTES

RAM8
: trick is to figure out how to mux twice based on address, once for setting the load bit and once for picking the correct output bus.

RAM64
: Interesting part here is that the MSB|LSB decision is arbitary. You could use the LSB to pick the RAM8 module, and use the MSB as the address within the RAM8, and it _would still work_. The caller for RAM64 doesn't care how you use the "complete address". It just cares that you return the same thing for that address.

RAM512
: I used the premise of the previous note and decided to index the RAM64 moduls by the LSB instead of the customary MSB. It still works :metal:
[03] Adds RAM64 2020-05-20 13:52:54 +00:00			`# NOTES`

			`RAM8`
			`: trick is to figure out how to mux twice based on address, once for setting the load bit and once for picking the correct output bus.`

			`RAM64`
			`: Interesting part here is that the MSB\|LSB decision is arbitary. You could use the LSB to pick the RAM8 module, and use the MSB as the address within the RAM8, and it _would still work_. The caller for RAM64 doesn't care how you use the "complete address". It just cares that you return the same thing for that address.`
[03] RAM4K + RAM512 2020-05-20 14:01:35 +00:00
			`RAM512`
			`: I used the premise of the previous note and decided to index the RAM64 moduls by the LSB instead of the customary MSB. It still works :metal:`