Skip to content

Update chapter-05 exercise 44 #19

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 1 commit into
base: main
Choose a base branch
from
Open

Update chapter-05 exercise 44 #19

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 3 additions & 3 deletions solutions/chapter-05.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -168,9 +168,9 @@
---
44. Solution:
1. a.
1. x3001: 0000 001 0 0010 0111
2. x3002: 0000 100 0 0100 1110
2. Program never halts, it just endless setting 0 to R0 and increment one loop.
1. x3001: 0000 001 0 0011 1110 Offset9 = 000111110 = +62 → jumps to x3001+1+62 = x3040
2. x3002: 0000 100 0 0111 1101 Offset9 = 001111101 = +125 → jumps to x3002+1+125 = x3080
2. Program halts when R0 = x8000 = 1000 0000 0000 0000 which will be considered negative by BR instruction at x3002.
---
45. PC put contents to MAR because it is how instruction loaded into LC-3. In this way we know which data where read or stored with, which operation. Microarchitecture increment PC to pointing to next instruction to read next instruction at next cycle.
---
Expand Down