COMSM1302 26/27 - 5th week Q&A by Alex Cockrean

RAM size to I/O mapping

2026-10-20 11:58:55 UTC

Does the size of RAM matter to where keyboard & monitor are mapped? For instance if it's a 64KB RAM, would the mapping for I/O still be to the same addresses?

last week query

2026-10-20 12:00:12 UTC

Regarding the SRAM from last week, I understand that the bitline outputs the value that is stored, however what is the purpose of the negated bitline? what role/function does it serve?

Quiz4: Timing question

2026-10-20 12:17:25 UTC

Could please explain the solution to the question with a falling edge one shot, 16 bit register and timing diagram.

In Hack assembly—which lacks native bit-shift instructions—how can we efficiently implement 1-pixel horizontal scrolling (requiring bits to shift across 16-bit word boundaries) without ruining the frame rate, or is smooth pixel-level horizontal animation computationally intractable on the Hack platform?

2026-10-20 12:21:04 UTC

Halting Problem

2026-10-20 12:34:51 UTC

Could you please explain what the Busy Beaver problem is and its relation to Halting Problem. Thanks.