Hello!   My name is Daryl Rictor and I've been working
(ok, hobbying) with micro-computers since 1979.   Here's a little background about me:
My first computer was a kit called the "COSMAC ELF."
This little jem sported the RCA CDP1802 processor.   It had 256 bytes of RAM, 256 bytes
of PROM, and a two-digit hexidecimal display and keypad.   I cut my teeth on machine language
with that one and still prefer machine language/assembly over higher level languages for
the simple tasks.   You can learn more about the COSMAC ELF here:
I later moved up to both Commodore 64 and Apple ][ computers.   I found them easy to program and fun
to experiment on.   I wrote several utility programs in assembly on the Commodore, including a touch
tone dialer and a game I called Mortar Fire, which was basically two cannons facing each other. Each
player took turns entering in the angle (accounting for wind and different heights). I later ported
it to the Apple II and also wrote a few trigonomitry & graphics routines, experimenting in 3-D generation.
Then came the PC boom, and I took up programming in Quick BASIC and later "C".
More recently, I had the urge to build some specialized controllers and decided the 65C02 would be perfect for the
task.   I wanted to be able to develop software on my PC and decided to write a 65C02 Simulator to simplify
design and debugging.   Not wanting to re-invent the wheel, I searched for an existing simulator.
This led to me to the AppleWIN emulator.   This is an Apple ][ emulator that runs under Windows.   It's source
code was made available in the public domain so I took it, stripped out the Apple ][ specific references, added
some more features, and released my "65C02 Simulator for Windows". While I am no longer maintaining it, it can
be downloaded here -> 65C02 Simulator For Windows. I have converted the Simulator's source
files to be compatible with the freeware "LCC" C Compiler. You can download "LCC" from
here -> LCC C Compiler This makes it easier for those
who want "play" with the source code.
I used the Simulator to create a simple monitor and miniassembler for my future SBC's.   This program was
adopted from the monitor written for the Apple ][ computers.   It's size is approximately 6K and sits in
EEPROM from $E800-$FFFF.   It includes RESET initialization of RAM based interrupt vectors and also has
a simple BRK handler. The SBC-2 uses this monitor.|
My next task was to design and build a simple Single Board Computer (SBC) to run my software on.   Simplicity and
a small footprint were my primary design goals.   I constructed my first SBC, now called "SBC-1", in
March 2001.   I had the board manufactured by expressPCB.com at
a cost of $62 for three boards. I am not longer supporting this board.
| After spending time with SBC-1 and building some simple I/O devices for it, I discovered that it was
under-equipped.   It lacked RS-232 communications and needed more IO ports.   Thus, the
birth of "SBC-2 v2.3" in April 2002.   SBC-2 was designed to provide more I/O and improved
expandability via an expansion port.   It's size was kept as small as possible but
large enough to provide as many options as I could. A minor upgrade resulted in SBC-2 v2.5. Check
it out here -> SBC-2
| My next project expands on SBC-2 and the 65c02, using it's big brother, the 65C816 16-bit processor. SBC-3
has 512k of SRAM, two 65C22 VIA's, and custom Video and SPI interface chips. It can display 320x200
color images with 8 bits per pixel. The SPI interface creates a gateway for many off-the-shelf
peripherals, including real-time clocks, mass storage, expanded I/O, and more. It's all wrapped up
in a 6.5" x 4" PCB.   Check it out here -> SBC-3
| My latest project takes a modular approach to building an SBC. SBC-4 has a base board with CPU and terminal
communications along with system decoding. All other I/O can be added using daughter boards.   The daughter
cards can be attached via ribbon cable or stackable headers.   Currently, there is a 65816 manin board and a more
basic 65c02 board is in the planning stage.   Check it out here -> SBC-4