diff --git a/notes/2023-08-05--dev-notes.md b/notes/2023-08-05--dev-notes.md
index 0778633..2448b28 100644
--- a/notes/2023-08-05--dev-notes.md
+++ b/notes/2023-08-05--dev-notes.md
@@ -1,8 +1,8 @@
 # Dev notes — 2023-08-05
 
-- consider refactoring assembler to do something more like 'tokenize, then call helper functons'
+- [ ] consider refactoring assembler to do something more like 'tokenize, then call helper functons'
 
-- consider an extended system:
+- [ ] consider an extended system:
   - add a byte in the ~zero-page to act as a flag for display mode
     - 0 = 1 byte per pixel (default)
     - 1 = 1 bit per pixel
@@ -20,7 +20,7 @@
   - but permit gamepad since that's a subset (NES layout = 8 bits/bytes, depending on mode)
   - look at how uxn does it?
 
-- <mark>TODO: rewrite to call things 'opcodes' and 'operands'</mark>
+- [ ] rewrite to call things 'opcodes' and 'operands'
 
 - add bank switching for higher 128 bytes
   - add a flag in the ~zero-page
@@ -28,4 +28,4 @@
 - try writing:
   - a 'greater than' routine
 
-- make coding forms!
\ No newline at end of file
+- [x] make coding forms!
\ No newline at end of file
diff --git a/notes/2023-08-07--dev-notes.md b/notes/2023-08-07--dev-notes.md
index a3dabdb..595448b 100644
--- a/notes/2023-08-07--dev-notes.md
+++ b/notes/2023-08-07--dev-notes.md
@@ -18,7 +18,7 @@ and <mark>overflow is signed</mark>
 
 ### flags register
 
-Replace the current 'Carry Flag' with a Flags Register.
+- [ ] Replace the current 'Carry Flag' with a Flags Register.
 
 Here's a sketch for the bit pattern:
 
@@ -45,7 +45,7 @@ cf. 6502:
 
 ### flag opcodes
 
-- <mark>TODO:</mark> replace `CHP` and `CFC` with `FHP` and `FTG`
+- [ ] replace `CHP` and `CFC` with `FHP` and `FTG`
 
 - `FHP n`: hop if flag _n_ is set
   - eg: `FHP 0` = hop if carry flag set
diff --git a/notes/2023-08-09--dev-notes.md b/notes/2023-08-09--dev-notes.md
index 4b763b1..489c833 100644
--- a/notes/2023-08-09--dev-notes.md
+++ b/notes/2023-08-09--dev-notes.md
@@ -61,7 +61,7 @@ Z X C V
 ## Turtle graphics
 
 - yesterday Elizabeth had the great idea to create a turtle robot to go with the paper computer
-- a minimal LOGO would be a fantastic (if challenging) program to write for the computer
+- [ ] a minimal LOGO would be a fantastic (if challenging) program to write for the computer
   - it could use the hex keypad:
     - using CHIP-8 layout...
     - A key: mode toggle
@@ -78,4 +78,4 @@ Z X C V
 
 ## Dot-matrix display
 
-- Maybe try 5x5, like the micro:bit?
\ No newline at end of file
+- [ ] Maybe try 5x5, like the micro:bit?
\ No newline at end of file
diff --git a/notes/2023-08-10--dev-notes.md b/notes/2023-08-10--dev-notes.md
index c28e99e..4236aac 100644
--- a/notes/2023-08-10--dev-notes.md
+++ b/notes/2023-08-10--dev-notes.md
@@ -1,6 +1,6 @@
 # Dev notes — 2023-08-10
 
-- Name it "Cardiograph"
+- [x] Name it "Cardiograph"
   - homage to CARDIAC
   - (and cardboard)
   - and the special feature is that unlike other paper computers, this one has a graphical display
@@ -9,9 +9,9 @@
 
 ## Keypad (and memory map)
 
-- Copy the CHIP-8 approach: one memory location that stores the current key pressed
-- (Only one key can be pressed at a time)
-- And then do a bitmask-y thing for the secret advanced mode, to add the ability to detecut multiple simultaneous keypresses
+- [ ] Copy the CHIP-8 approach: one memory location that stores the current key pressed
+  - (Only one key can be pressed at a time)
+  - And then do a bitmask-y thing for the secret advanced mode, to add the ability to detect multiple simultaneous keypresses
 
 ## Display (and memory map)
 
@@ -29,4 +29,4 @@
 
 ## (Moved from readme:) Possible features, maybe someday
 
-- Timer (for a version in software/electronic-hardware)
+- Timer (for a version in software/electronic-hardware)
\ No newline at end of file