I've designed a small 68HC11 board with Eagle. Since I'm using the GNU/Linux free version, I'm limited by a 8cm x 10cm board. The board contains:

• A 68HC11 running at 8Mhz (512 byte eeprom, 256 byte ram),
• A 27128/27256 eprom,
• A 6264/62256 ram,
• A 256 byte IO space mapped at 256 bytes boundaries,
• A 2x25 expansion bus connector (D[0..7], A[0..15], IO[0..7], control signals, ...),
• A 2x13 LCD/keyboard connector (LCD[0..6], KEYB[0..3]),
• A 2x5 analog input connector (An[0..7], Vref).

This board is the core CPU of my Embedded Bathroom Control System.

Documentation on the chips used by EBCS 68HC11 board.

Documentation (1)
M68HC11E.pdf	68HC11E1
27c256.pdf	256K (32K x 8) CMOS EPROM
HM62256.pdf	32,768-word × 8-bit High Speed CMOS Static RAM
74HC138.pdf	3-to-8 line decoder/demultiplexer
74HC00.pdf	Quad 2-input NAND gate
74HC27.pdf	Triple 3-input NOR gate
74HC573.pdf	Octal D-type latch with 3 state output
74HC688.pdf	8 bit equality comparator
MAX7705.pdf	µP Power-Supply Monitor with Reset
MAX220-MAX249.pdf	+5V-Powered, Multichannel RS-232 Drivers/Receivers
TL7705-design.pdf	Supply Voltage Supervisor TL77xx Series

(1) Documentation publicly available on various constructor web sites and copied here for archiving.