diff --git a/spec/book.typ b/spec/book.typ
index 3363c0c26..677a33b93 100644
--- a/spec/book.typ
+++ b/spec/book.typ
@@ -14,7 +14,9 @@
     #chapter("memw.typ")[MEMW]
     #chapter("lt.typ")[LT]
     #chapter("mul.typ")[MUL chip]
+    #chapter("dvrm.typ")[DVRM chip]
     #chapter("load.typ")[LOAD chip]
+    #chapter("ecall.typ")[ECALL chips]
     #chapter("bitwise.typ")[BITWISE]
   ]
 )
diff --git a/spec/dvrm.typ b/spec/dvrm.typ
new file mode 100644
index 000000000..69e79cee2
--- /dev/null
+++ b/spec/dvrm.typ
@@ -0,0 +1,17 @@
+#import "/book.typ": book-page
+#import "/src.typ": load_config, load_chip
+#import "/chip.typ": (
+  render_chip_column_table,
+  total_nr_variables,
+  total_nr_instantiated_columns,
+  render_constraint_table,
+  render_chip_assumptions,
+  render_chip_padding_table,
+)
+
+#let config = load_config()
+// #let chip = load_chip("src/dvrm.toml", config)
+
+#show: book-page.with(title: "DVRM chip")
+
+*placeholder chapter: WIP*
diff --git a/spec/ecall.typ b/spec/ecall.typ
new file mode 100644
index 000000000..fee25768c
--- /dev/null
+++ b/spec/ecall.typ
@@ -0,0 +1,17 @@
+#import "/book.typ": book-page
+#import "/src.typ": load_config, load_chip
+#import "/chip.typ": (
+  render_chip_column_table,
+  total_nr_variables,
+  total_nr_instantiated_columns,
+  render_constraint_table,
+  render_chip_assumptions,
+  render_chip_padding_table,
+)
+
+#let config = load_config()
+
+#show: book-page.with(title: "ECALL chips")
+
+*placeholder chapter: WIP*
+