7489 - include GNU Unifont

https://en.wikipedia.org/wiki/GNU_Unifont#The_.hex_font_format
http://unifoundry.com/unifont/index.html

Since GNU Unifont is covered under the GPL v2, so I believe is this repo.

8 files changed, 552 insertions, 26 deletions

diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 00000000..ecaae0f0
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,283 @@
+GPL VERSION 2
+-------------
+
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
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+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
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+  When we speak of free software, we are referring to freedom, not
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+infringement or for any other reason (not limited to patent issues),
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+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
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+
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+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
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+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
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+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
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+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
diff --git a/apps/survey_baremetal b/apps/survey_baremetal
index 879889b7..6d1af44d 100755
--- a/apps/survey_baremetal
+++ b/apps/survey_baremetal
Binary files differdiff --git a/apps/survey_baremetal.subx b/apps/survey_baremetal.subx
index fbb79b68..7b0815ba 100644
--- a/apps/survey_baremetal.subx
+++ b/apps/survey_baremetal.subx
@@ -7,7 +7,7 @@
 #
 # The expected input is a stream of bytes and some interspersed labels.
 # Comments and '==' segment headers are allowed, but ignored. The emitted code
-# will all lie in a single header, and start at address 0x8800.
+# will all lie in a single header, and start at address 0x9000.
 #   $ cat x
 #   == code
 #   l1:
@@ -197,7 +197,7 @@ test-subx-survey-computes-addresses:
     #     01
     #
     # trace contains (in any order):
-    #   label x is at address 0x8805
+    #   label x is at address 0x9005
     #
     # . prologue
     55/push-ebp
@@ -315,10 +315,10 @@ test-subx-survey-computes-addresses:
 #?     # . . discard args
 #?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
 #?     # }}}
-    # . check-trace-contains("label 'x' is at address 0x00008805.", msg)
+    # . check-trace-contains("label 'x' is at address 0x00009005.", msg)
     # . . push args
     68/push  "F - test-subx-survey-computes-addresses/0"/imm32
-    68/push  "label 'x' is at address 0x00008805."/imm32
+    68/push  "label 'x' is at address 0x00009005."/imm32
     # . . call
     e8/call  check-trace-contains/disp32
     # . . discard args
@@ -330,7 +330,7 @@ test-subx-survey-computes-addresses:
 
 compute-offsets:  # in: (addr stream byte), labels: (addr stream {(handle array byte), address})
     # pseudocode:
-    #   var current-address = 0x8800
+    #   var current-address = 0x9000
     #   var line: (stream byte 512)
     #   while true                                  # line loop
     #     clear-stream(line)
@@ -362,8 +362,8 @@ compute-offsets:  # in: (addr stream byte), labels: (addr stream {(handle array
     53/push-ebx
     56/push-esi
     57/push-edi
-    # var current-address/esi: int = 0x8800
-    be/copy-to-esi  0x8800/imm32
+    # var current-address/esi: int = 0x9000
+    be/copy-to-esi  0x9000/imm32
     # var line/ecx: (stream byte 512)
     81          5/subop/subtract    3/mod/direct    4/rm32/esp    .           .             .           .           .               0x200/imm32       # subtract from esp
     68/push  0x200/imm32/size
@@ -595,7 +595,7 @@ test-compute-offsets:
     #     34
     #
     # trace contains (in any order):
-    #   label 'x' is at address 0x8806.
+    #   label 'x' is at address 0x9006.
     #
     # . prologue
     55/push-ebp
@@ -697,10 +697,10 @@ test-compute-offsets:
 #?     # . . discard args
 #?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
 #?     # }}}
-    # . check-trace-contains("label 'x' is at address 0x00008806.", msg)
+    # . check-trace-contains("label 'x' is at address 0x00009006.", msg)
     # . . push args
     68/push  "F - test-compute-offsets"/imm32
-    68/push  "label 'x' is at address 0x00008806."/imm32
+    68/push  "label 'x' is at address 0x00009006."/imm32
     # . . call
     e8/call  check-trace-contains/disp32
     # . . discard args
@@ -732,7 +732,7 @@ emit-output:datum:  # slice
 
 emit-output:  # in: (addr stream byte), out: (addr buffered-file), labels: (addr stream {(handle array byte), address})
     # pseudocode:
-    #   var address-of-next-instruction = 0x8800
+    #   var address-of-next-instruction = 0x9000
     #   var line: (stream byte 512)
     #   line-loop:
     #   while true
@@ -803,8 +803,8 @@ emit-output:  # in: (addr stream byte), out: (addr buffered-file), labels: (addr
     68/push  0/imm32/end
     68/push  0/imm32/start
     89/copy                         3/mod/direct    2/rm32/edx    .           .             .           4/r32/esp   .               .                 # copy esp to edx
-    # var address-of-next-instruction/ebx = 0x8800
-    bb/copy-to-ebx  0x8800/imm32
+    # var address-of-next-instruction/ebx = 0x9000
+    bb/copy-to-ebx  0x9000/imm32
 $emit-output:line-loop:
     # clear-stream(line)
     # . . push args
@@ -1491,12 +1491,12 @@ test-emit-output-code-label:
     #     ef gh
     #     e8 l1/disp32
     #   labels:
-    #     - 'l1': 0x8810
+    #     - 'l1': 0x9010
     #
     # output:
     #   ab cd
     #   ef gh
-    #   e8 07 00 00 00  # 0x8810 - 0x8809 = 7
+    #   e8 07 00 00 00  # 0x9010 - 0x9009 = 7
     #
     # . prologue
     55/push-ebp
@@ -1566,8 +1566,8 @@ test-emit-output-code-label:
     e8/call  write/disp32
     # . . discard args
     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . stream-add2(labels, "l1", 0x8810)
-    68/push  0x8810/imm32/label-address
+    # . stream-add2(labels, "l1", 0x9010)
+    68/push  0x9010/imm32/label-address
     # . . push handle for "l1"
     53/push-ebx
     68/push  "l1"/imm32
diff --git a/baremetal/README.md b/baremetal/README.md
index 4d1c2876..96e7c900 100644
--- a/baremetal/README.md
+++ b/baremetal/README.md
@@ -30,7 +30,7 @@ operating systems. There's also currently no code/data segment separation,
 just labels and bytes. I promise not to write self-modifying code. Security
 and sandboxing is still an open question.
 
-Most programs here assume `main` starts at address 0x8800 (3KB or 6 disk
+Most programs here assume `main` starts at address 0x9000 (7KB or 14 disk
 sectors past the BIOS entrypoint). See baremetal/boot.hex for details.
 
 So far the programs have only been tested in Qemu and Bochs emulators.
diff --git a/baremetal/boot.hex b/baremetal/boot.hex
index f6ded4aa..3f78ca7a 100644
--- a/baremetal/boot.hex
+++ b/baremetal/boot.hex
@@ -1,4 +1,4 @@
-# Code for the first 2 disk sectors, that all programs in this directory need:
+# Code for the first disk sector that all programs in this directory need:
 #   - load sectors past the first (using BIOS primitives) since only the first is available by default
 #     - if this fails, print 'D' at top-left of screen and halt
 #   - initialize a minimal graphics mode
@@ -31,7 +31,7 @@
 #   - can't use any syscalls
 #   - can't print text to video memory (past these boot sectors)
 #   - must only print raw pixels (256 colors) to video memory (resolution 1024x768)
-#   - must store their entry-point at address 0x8800
+#   - must store their entry-point at address 0x9000
 
 ## 16-bit entry point
 
@@ -64,7 +64,7 @@
   b5 00  # ch <- 0  # cylinder 0
   b6 00  # dh <- 0  # track 0
   b1 02  # cl <- 2  # second sector, 1-based
-  b0 10  # al <- 16  # number of sectors to read; all sectors must be in a single track
+  b0 20  # al <- 32  # number of sectors to read; all sectors must be in a single track
   # address to write sectors to = es:bx = 0x7e00, contiguous with boot segment
   bb 00 00  # bx <- 0
   8e c3  # es <- bx
@@ -205,7 +205,7 @@ e9 fb ff  # loop forever
 
   # initialization is done; enable interrupts
   fb
-  e9 01 0b 00 00  # jump to 0x8800 [label]
+  e9 01 13 00 00  # jump to 0x9000 [label]
 
 # padding
 # ff:
@@ -428,7 +428,10 @@ e9 fb ff  # loop forever
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 
+## the rest of this file has data
+
 # offset 400 (address 0x8000):
+# translating keys to ASCII {{{
 # keyboard normal map:
 00
 #  es
@@ -585,6 +588,246 @@ e9 fb ff  # loop forever
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# }}}
+
 # offset c00 (address 0x8800)
+# Bitmaps for some ASCII characters (soon Unicode) {{{
+# Part of GNU Unifont
+# 8px wide, 16px tall
+# Based on http://unifoundry.com/pub/unifont/unifont-13.0.05/font-builds/unifont-13.0.05.hex.gz
+# See https://en.wikipedia.org/wiki/GNU_Unifont#The_.hex_font_format
+# Website: http://unifoundry.com/unifont/index.html
+# License: http://unifoundry.com/LICENSE.txt (GPL v2)
+# Each line below is a bitmap for a single character.
+#   Each byte is a bitmap for a single row of 8 pixels.
+
+# some unprintable ASCII chars
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# 0x20 = space
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# !
+  00 00 00 00 08 08 08 08 08 08 08 00 08 08 00 00
+# "
+  00 00 22 22 22 22 00 00 00 00 00 00 00 00 00 00
+# 0x23 = '#'
+  00 00 00 00 12 12 12 7e 24 24 7e 48 48 48 00 00
+# $
+  00 00 00 00 08 3e 49 48 38 0e 09 49 3e 08 00 00
+# %
+  00 00 00 00 31 4a 4a 34 08 08 16 29 29 46 00 00
+# &
+  00 00 00 00 1c 22 22 14 18 29 45 42 46 39 00 00
+# '
+  00 00 08 08 08 08 00 00 00 00 00 00 00 00 00 00
+# (
+  00 00 00 04 08 08 10 10 10 10 10 10 08 08 04 00
+# )
+  00 00 00 20 10 10 08 08 08 08 08 08 10 10 20 00
+# *
+  00 00 00 00 00 00 08 49 2a 1c 2a 49 08 00 00 00
+# +
+  00 00 00 00 00 00 08 08 08 7f 08 08 08 00 00 00
+# ,
+  00 00 00 00 00 00 00 00 00 00 00 00 18 08 08 10
+# -
+  00 00 00 00 00 00 00 00 00 3c 00 00 00 00 00 00
+# .
+  00 00 00 00 00 00 00 00 00 00 00 00 18 18 00 00
+# /
+  00 00 00 00 02 02 04 08 08 10 10 20 40 40 00 00
+# 0x30 = '0'
+  00 00 00 00 18 24 42 46 4a 52 62 42 24 18 00 00
+# 1
+  00 00 00 00 08 18 28 08 08 08 08 08 08 3e 00 00
+# 2
+  00 00 00 00 3c 42 42 02 0c 10 20 40 40 7e 00 00
+# 3
+  00 00 00 00 3c 42 42 02 1c 02 02 42 42 3c 00 00
+# 4
+  00 00 00 00 04 0c 14 24 44 44 7e 04 04 04 00 00
+# 5
+  00 00 00 00 7e 40 40 40 7c 02 02 02 42 3c 00 00
+# 6
+  00 00 00 00 1c 20 40 40 7c 42 42 42 42 3c 00 00
+# 7
+  00 00 00 00 7e 02 02 04 04 04 08 08 08 08 00 00
+# 8
+  00 00 00 00 3c 42 42 42 3c 42 42 42 42 3c 00 00
+# 9
+  00 00 00 00 3c 42 42 42 3e 02 02 02 04 38 00 00
+# :
+  00 00 00 00 00 00 18 18 00 00 00 18 18 00 00 00
+# ;
+  00 00 00 00 00 00 18 18 00 00 00 18 08 08 10 00
+# <
+  00 00 00 00 00 02 04 08 10 20 10 08 04 02 00 00
+# =
+  00 00 00 00 00 00 00 7e 00 00 00 7e 00 00 00 00
+# >
+  00 00 00 00 00 40 20 10 08 04 08 10 20 40 00 00
+# ?
+  00 00 00 00 3c 42 42 02 04 08 08 00 08 08 00 00
+# 0x40 = @
+  00 00 00 00 1c 22 4a 56 52 52 52 4e 20 1e 00 00
+# A
+  00 00 00 00 18 24 24 42 42 7e 42 42 42 42 00 00
+# B
+  00 00 00 00 7c 42 42 42 7c 42 42 42 42 7c 00 00
+# C
+  00 00 00 00 3c 42 42 40 40 40 40 42 42 3c 00 00
+# D
+  00 00 00 00 78 44 42 42 42 42 42 42 44 78 00 00
+# E
+  00 00 00 00 7e 40 40 40 7c 40 40 40 40 7e 00 00
+# F
+  00 00 00 00 7e 40 40 40 7c 40 40 40 40 40 00 00
+# G
+  00 00 00 00 3c 42 42 40 40 4e 42 42 46 3a 00 00
+# H
+  00 00 00 00 42 42 42 42 7e 42 42 42 42 42 00 00
+# I
+  00 00 00 00 3e 08 08 08 08 08 08 08 08 3e 00 00
+# J
+  00 00 00 00 1f 04 04 04 04 04 04 44 44 38 00 00
+# K
+  00 00 00 00 42 44 48 50 60 60 50 48 44 42 00 00
+# L
+  00 00 00 00 40 40 40 40 40 40 40 40 40 7e 00 00
+# M
+  00 00 00 00 42 42 66 66 5a 5a 42 42 42 42 00 00
+# N
+  00 00 00 00 42 62 62 52 52 4a 4a 46 46 42 00 00
+# O
+  00 00 00 00 3c 42 42 42 42 42 42 42 42 3c 00 00
+# 0x50 = P
+  00 00 00 00 7c 42 42 42 7c 40 40 40 40 40 00 00
+# Q
+  00 00 00 00 3c 42 42 42 42 42 42 5a 66 3c 03 00
+# R
+  00 00 00 00 7c 42 42 42 7c 48 44 44 42 42 00 00
+# S
+  00 00 00 00 3c 42 42 40 30 0c 02 42 42 3c 00 00
+# T
+  00 00 00 00 7f 08 08 08 08 08 08 08 08 08 00 00
+# U
+  00 00 00 00 42 42 42 42 42 42 42 42 42 3c 00 00
+# V
+  00 00 00 00 41 41 41 22 22 22 14 14 08 08 00 00
+# W
+  00 00 00 00 42 42 42 42 5a 5a 66 66 42 42 00 00
+# X
+  00 00 00 00 42 42 24 24 18 18 24 24 42 42 00 00
+# Y
+  00 00 00 00 41 41 22 22 14 08 08 08 08 08 00 00
+# Z
+  00 00 00 00 7e 02 02 04 08 10 20 40 40 7e 00 00
+# [
+  00 00 00 0e 08 08 08 08 08 08 08 08 08 08 0e 00
+# \
+  00 00 00 00 40 40 20 10 10 08 08 04 02 02 00 00
+# ]
+  00 00 00 70 10 10 10 10 10 10 10 10 10 10 70 00
+# ^
+  00 00 18 24 42 00 00 00 00 00 00 00 00 00 00 00
+# _
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 7f 00
+# 0x60 = backtick
+  00 20 10 08 00 00 00 00 00 00 00 00 00 00 00 00
+# a
+  00 00 00 00 00 00 3c 42 02 3e 42 42 46 3a 00 00
+# b
+  00 00 00 40 40 40 5c 62 42 42 42 42 62 5c 00 00
+# c
+  00 00 00 00 00 00 3c 42 40 40 40 40 42 3c 00 00
+# d
+  00 00 00 02 02 02 3a 46 42 42 42 42 46 3a 00 00
+# e
+  00 00 00 00 00 00 3c 42 42 7e 40 40 42 3c 00 00
+# f
+  00 00 00 0c 10 10 10 7c 10 10 10 10 10 10 00 00
+# g
+  00 00 00 00 00 02 3a 44 44 44 38 20 3c 42 42 3c
+# h
+  00 00 00 40 40 40 5c 62 42 42 42 42 42 42 00 00
+# i
+  00 00 00 08 08 00 18 08 08 08 08 08 08 3e 00 00
+# j
+  00 00 00 04 04 00 0c 04 04 04 04 04 04 04 48 30
+# k
+  00 00 00 40 40 40 44 48 50 60 50 48 44 42 00 00
+# l
+  00 00 00 18 08 08 08 08 08 08 08 08 08 3e 00 00
+# m
+  00 00 00 00 00 00 76 49 49 49 49 49 49 49 00 00
+# n
+  00 00 00 00 00 00 5c 62 42 42 42 42 42 42 00 00
+# o
+  00 00 00 00 00 00 3c 42 42 42 42 42 42 3c 00 00
+# 0x70 = p
+  00 00 00 00 00 00 5c 62 42 42 42 42 62 5c 40 40
+# q
+  00 00 00 00 00 00 3a 46 42 42 42 42 46 3a 02 02
+# r
+  00 00 00 00 00 00 5c 62 42 40 40 40 40 40 00 00
+# s
+  00 00 00 00 00 00 3c 42 40 30 0c 02 42 3c 00 00
+# t
+  00 00 00 00 10 10 10 7c 10 10 10 10 10 0c 00 00
+# u
+  00 00 00 00 00 00 42 42 42 42 42 42 46 3a 00 00
+# v
+  00 00 00 00 00 00 42 42 42 24 24 24 18 18 00 00
+# w
+  00 00 00 00 00 00 41 49 49 49 49 49 49 36 00 00
+# x
+  00 00 00 00 00 00 42 42 24 18 18 24 42 42 00 00
+# y
+  00 00 00 00 00 00 42 42 42 42 42 26 1a 02 02 3c
+# z
+  00 00 00 00 00 00 7e 02 04 08 10 20 40 7e 00 00
+# {
+  00 00 00 0c 10 10 08 08 10 20 10 08 08 10 10 0c
+# |
+  00 00 08 08 08 08 08 08 08 08 08 08 08 08 08 08
+# }
+  00 00 00 30 08 08 10 10 08 04 08 10 10 08 08 30
+# ~
+  00 00 00 31 49 46 00 00 00 00 00 00 00 00 00 00
+# 0x7f = del (unused)
+  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+# }}}
+
+# offset 1400 (address 0x9000)
 
 # vim:ft=subx
diff --git a/baremetal/ex1.hex b/baremetal/ex1.hex
index 8dadf0e2..49f6e446 100644
--- a/baremetal/ex1.hex
+++ b/baremetal/ex1.hex
@@ -13,7 +13,7 @@
 # Or:
 #   bochs -f baremetal/boot.bochsrc  # boot.bochsrc loads disk.img
 
-# main:  (address 0x8800)
-e9 fb ff ff ff  # jump to address 0x8800
+# main:  (address 0x9000)
+e9 fb ff ff ff  # jump to main, hanging indefinitely
 
 # vim:ft=subx
diff --git a/baremetal/ex2.hex b/baremetal/ex2.hex
index 52150b7f..439a0e03 100644
--- a/baremetal/ex2.hex
+++ b/baremetal/ex2.hex
@@ -13,7 +13,7 @@
 # Expected output:
 #   html/baremetal.png
 
-# main:  (address 0x8800)
+# main:  (address 0x9000)
 
 # ecx <- LFB
 8b  # copy *rm32 to r32
diff --git a/baremetal/ex3.hex b/baremetal/ex3.hex
index 92664a23..694de37d 100644
--- a/baremetal/ex3.hex
+++ b/baremetal/ex3.hex
@@ -11,7 +11,7 @@
 # Or:
 #   bochs -f baremetal/boot.bochsrc  # boot.bochsrc loads disk.img
 
-# main:  (address 0x8800)
+# main:  (address 0x9000)
 
 # eax <- LFB
 8b  # copy *rm32 to r32