0 - the first floppy drive.

1 - the second floppy drive.

file.bas - BASIC program.

file.bin - Machine language program.

To load a machine language program called "file.bin":
loadm"file.bin

To execute (start) a machine language program:
exec

To load a BASIC program called "file.bas":
load"file.bas

Run the BASIC program by typing:
run

To run an autoexecuting BASIC file:
run"file.bas

List the files and directories on a disk:
dir

To change to drive 3:
drive 3

To format the disk in drive 0 :
dskini0

To list the lines of a BASIC program in memory:
list

Deleting a file named FILE.EXT:
kill"file.ext

To copy "file.ext" to drive 1
copy"file.ext" to "1:file.ext"

To rename a file:
rename"file.ext" to "myfile.ext"

Clear the screen:
cls

Copying the disk in the first floppy drive to the blank disk in the second drive:
backup 0 to 1

Load a file from tape:
CLOAD"FILENAME.EXT"

Save a fle to tape:
CSAVE"FILENAME.EXT"

Double the MHz rating of your CoCo II (overclock command):
poke 65495,0

Set the MHz rating of your CoCo II back to normal:
poke 65494,0

Getting an OS9 game running:
Insert an OS-9 disk (we'll use the game Rogue as an example), and type:
DOS

Then type
rogue -x

----------------------------------------------------

File system error messages:

I/O - Input/Output error
SN - Syntax error (incorrect BASIC or disk command -- spelling error)
TM - Type mismatch (or incorrect contextual use of a disk command)
DF - Disk full
NE - Non-Existant file (the file you asked about is not on that disk)
WP - Disk is write-protected

----------------------------------------------------

CoCo III Commands:

To change the video mode to its inverse:
[ALT] [RESET]

Double the MHz rating of your CoCo III (overclock command):
poke 65497,0

Set the MHz rating of your CoCo III back to normal:
poke 65496,0

INFORMATION:

CoCo II - 64K RAM
- 6809 Motorola CPU 16-bit internal ; 8-bit external architecture.
- 9-color palette. 4 colors at a time.
- max res of 256x192

------------------------------------------------------------

CoCo III - 128K or 512K RAM
- 68B09E Motorola CPU 16-bit Internal ; 8-bit external architecture.
- Additional registers, and faster operational speeds (more transistors).
- Max Resolution of 640x200 in 4 colors. 320x200 16 colors. Palette of 64 colors.

More powerful operating systems are OS-9 Level 1 and 2, by Microware.
(OS-9 is a pre-emptive multitasking O/S, and has a bit of a cult following).
Newer versions of OS-9 are currently used for industrial/robotics purposes.
Note: This has nothing to do with MacOS.

-------------------------------------------------------

So you'd like to learn to program in BASIC. Or maybe you just want to
play around with an old-skool Tandy Color Computer. Well, here's everything
you need to get started:

ColorComputer2.7z Tandy Color Computer 2 emulator and extras for the PC
(Win98se, 2000, XP, 7,...). Audio, joystick, and 5.25" drive support possible in Win98se.

DODdisk.dsk Daggorath modified to allow you to save your game to diskette. Type RUN"DAGORATH


And here's the Tandy Color Computer 3 emulator:
ColorComputer3.zip


--------------

Some info on how to get Atari video game controllers running on a Tandy:

The insides of a Wico analog to digital joystick adapter.

Schematic posted by a hobbyist.