Fall 2025

.github/workflows/push.yml

@@ -7,6 +7,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+    - name: Set timezone
+      uses: szenius/[email protected]
+      with:
+        timezoneLinux: "America/New_York"
     - name: Checkout
       uses: actions/checkout@main
     - name: Install dependencies

www/colophon.scrbl

@@ -0,0 +1,23 @@
+#lang scribble/base
+@(require racket/date
+          racket/port
+          racket/system
+	  racket/string)
+
+@(define (shell s)
+   (with-output-to-string (λ () (system s))))
+
+@(define (i s)
+   (item (verbatim (shell s))))
+
+@title[#:style '(unnumbered)]{Colophon}
+
+This document (@string-trim[(shell "git rev-parse --short HEAD")]) was produced on @(date->string (current-date) #t).
+
+System information:
+@itemlist[
+ (i "uname -srm")
+ (i "racket --version")
+ (i "raco pkg show -lu a86 langs")
+ (i "nasm --version")
+ (i "gcc --version")]

www/defns.rkt

@@ -39,6 +39,7 @@
   (list (list "Pierce Darragh" "[email protected]")
         (list "Benjamin Quiring" "[email protected]")
         (list "Kalyan Bhetwal" "[email protected]")
+        (list "Abhi Senthilkumar" "[email protected]")
         (list "Zhongqi Wang" "[email protected]")
         (list "Kazi Tasnim Zinat" "[email protected]")))
 
@@ -64,3 +65,27 @@
               "Thursday, November 20, 11:59PM"
               "Thursday, December 4, 11:59PM")
             (sub1 i)))
+
+(define office-hours
+  (itemlist
+   #:style 'compact
+   (item "Monday"
+         (itemlist
+          (item "9:00am–12:00pm — Zhonqi")
+          (item "12:00pm–3:00pm — Ben")
+          (item "3:00pm–6:00pm — Abhi")))
+   (item "Tuesday"
+         (itemlist
+          (item "11:00am–2:00pm - Abhi")
+          (item "5:00pm–8:00pm - Kalyan (IRB, 2nd Floor)")))
+   (item "Wednesday"
+         (itemlist
+          (item "9:00am–12:00pm — Zhonqi")
+          (item "12:00pm–3:00pm — Ben")))
+   (item "Thursday"
+         (itemlist
+          (item "10:00am–1:00pm — Zinat")
+          (item "5:00pm–8:00pm — Kalyan (IRB, 2nd Floor)")))
+   (item "Friday"
+         (itemlist
+          (item "11:00am–2:00pm — Zinat")))))

www/main.scrbl

@@ -6,16 +6,12 @@
       	  "defns.rkt"
           "utils.rkt")
 
-@(define (blockquote . strs)
-   (make-nested-flow (make-style "blockquote" '(command))
-                     (decode-flow strs)))
-
-
 @(define accessible
    (style #f (list (js-addition "js/accessibility.js")
                    (attributes '((lang . "en"))))))
 
-@title[#:style accessible @courseno]{: Design and Implementation of Programming Languages}
+@title[#:style accessible @courseno]{: Design and Implementation of
+Programming Languages}
 
 @image[#:scale 1/2 #:style float-right]{img/wizard.png}
 
@@ -40,61 +36,24 @@ implement several related languages.
 	        #;(list prof2 prof2-email)
 		staff)]
 
-
-@;{
-@tabular[#:style 'boxed
-         #:row-properties '(bottom-border ())
-	 (list (list @bold{Time}  @bold{Monday} @bold{Tuesday} @bold{Wednesday} @bold{Thursday}  @bold{Friday})
-               (list      "8 AM"  'cont        'cont           'cont            'cont         'cont)
-	       (list      "9 AM"  'cont        'cont           'cont            'cont         'cont)
-	       (list     "10 AM"  'cont        'cont           'cont            'cont         'cont)
-	       (list     "11 AM"  'cont        'cont           'cont            'cont         'cont)
-	       (list     "12 PM"  'cont        'cont           'cont            'cont         'cont)
-	       (list      "1 PM"  'cont        'cont           'cont            'cont         'cont)
-	       (list      "2 PM"  'cont        'cont           'cont            'cont         'cont)
-	       (list      "3 PM"  'cont        'cont           'cont            'cont         'cont)
-	       (list      "4 PM"  'cont        'cont           'cont            'cont         'cont)
-	       (list      "5 PM"  'cont        'cont           'cont            'cont         'cont))]
-}
-
 @bold{Communications:} @link[@elms-url]{ELMS}, @link[@piazza]{Piazza}
 
-@bold{Assumptions:} This course assumes you know the material in CMSC 330 and
-CMSC 216. In particular, you need to know how to program in a functional
-programming language like OCaml and some familiarity with programming in C and
-Assembly. See the @seclink["Texts"]{Texts} page for references to brush up on
-this material.
+@bold{Assumptions:} This course assumes you know the material in CMSC
+330 and CMSC 216. In particular, you need to know how to program in a
+functional programming language like OCaml and some familiarity with
+programming in C and Assembly. See the @seclink["Texts"]{Texts} page
+for references to brush up on this material.
 
-@bold{Disclaimer:} All information on this web page is tentative and subject to
-change. Any substantive change will be accompanied with an announcement to the
-class via ELMS.
+@bold{Disclaimer:} All information on this web page is tentative and
+subject to change. Any substantive change will be accompanied with an
+announcement to the class via ELMS.
 
 @bold{Feedback:} We welcome anonymous feedback on the course and its
 staff using this @link[feedback]{form}.
 
-@bold{TA office hours:} @office-hour-location
-
-@itemlist[
- #:style 'compact
- @item{Monday
-  @itemlist[
-   @item{9:00–12:00 — Zhonqi}
-   @item{12:00–3:00 — Ben}
-   @item{3:30–6:30 — Kalyan}]}
- @item{Tuesday}
- @item{Wednesday
-  @itemlist[
-   @item{9:00–12:00 — Zhonqi}
-   @item{12:00–3:00 — Ben}
-   @item{3:30–6:30 — Kalyan}]}
- @item{Thursday
-  @itemlist[
-   @item{10:00–1:00 — Zinat}]}
- @item{Friday
-  @itemlist[
-   @item{11:00–2:00 — Zinat}
-   @item{1:00–4:00 — Kalyan}]}
-]     
+@bold{TA office hours:} @office-hour-location (unless otherwise noted)
+
+@office-hours
 
 @include-section{syllabus.scrbl}
 @include-section{texts.scrbl}
@@ -104,3 +63,4 @@ staff using this @link[feedback]{form}.
 @include-section{midterms.scrbl}
 @include-section{project.scrbl}
 @include-section{software.scrbl}
+@include-section{colophon.scrbl}

www/notes/a86.scrbl

@@ -144,9 +144,9 @@ underscore, while on Linux you do not.  So on a Mac, you would use the
 names @tt{_entry}, @tt{_tri}, and @tt{_done}, while on Linux you would
 use @tt{entry}, @tt{tri}, and @tt{done}.
 
-This example is shown using the @(if (eq? (system-type 'os) 'macosx)
-"MacOS" "Linux") naming convention, because that's what operating
-system was used when this web page was built.}
+Alternatively, you can impose the underscore naming convention by
+passing @tt{--gprefix _} to @tt{nasm}; this way you avoid having to
+write the underscores within the file.}
 
 @filebox-include[fancy-nasm a86 "tri.s"]
 
@@ -246,13 +246,15 @@ stack or use the @tt{call} instruction.}
 We can compile the @tt{tri.s} assembly program to an object
 file with @tt{nasm}:
 
-@margin-note{The format argument should be @tt{macho64} on
- Mac OS and @tt{elf64} on Linux.}
+@margin-note{The format argument should be @tt{macho64} on macOS and
+ @tt{elf64} on Linux.  The @tt{--gprefix _} argument should be given
+ on macOS in order to follow the system's naming convention
+ requirements.}
 
 @shellbox[
  (format "nasm -f ~a -o tri.o tri.s"
          (if (eq? 'macosx (system-type 'os))
-             "macho64"
+             "macho64 --gprefix _"
              "elf64"))]
 
 To run the object file, we will need to link with a small C program
@@ -407,10 +409,6 @@ program using nasm notation, called @racket[asm-display].  Calling
 this function prints to the current output port, but it's also
 possible to write the output to a file or convert it to a string.
 
-@margin-note{The @racket[asm-display] function knows what OS you are
-using and adjusts the label naming convention to use underscores or
-not, so that you don't have to worry about it.}
-
 @ex[
 (asm-display (tri 36))
     ]