Color Computer CoCo SDC, Manual

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COCO SDC | 3
Insert the card into the socket before applying
power to the CoCo or Mult-Pak Interface.
When power is applied, the LED on the CoCo
SDC board should light up momentarily. If
the LED does not turn off after a few seconds
then this is an indication that the card was not
recognized by the hardware. This can happen if
the card has not been formatted with a FAT16
or FAT32 file system. It could also indicate that
the card was not inserted properly or that there
is a problem with the CoCo SDC itself.
Although SD cards are hot-swappable, the
CoCo SDC firmware does not handle that
situation very well. It’s recommended that
you completely shutdown the CoCo and
MPI before swapping cards.
Jumper Settings
The three-pin jumper strip provides two
mutually exclusive options for board
configuration; Cartridge Auto-Start and
Dragon DRQ Mode. The default setting has
neither option enabled (no jumper installed).
Installing a jumper between the center pin
and the AUTO pin connects the Q clock to the
CART interrupt pin. This causes the computer
to automatically start executing the program in
the selected Flash bank at power-up. Do NOT
use this option to auto-start SDC-DOS or other
Disk BASIC ROMs.
Installing a jumper between the center pin and
the DRQ pin is required to support emulation
of a Dragon DOS floppy controller. Do NOT
install a jumper in this position when using the
board with a CoCo.
Jumper & DIP Switches.
DIP Switch Settings
The board includes a 4-position DIP switch
that is used to configure which bank of Flash
is active at power-up or reset and which
addressing scheme is used to communicate
with the controller.
CAUTION: Make sure the computer’s power
is off before making any changes to the DIP
switch settings!