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2. Insert Floppy
The “Insert Floppy” option is used to load new content into a drive. The
floppy disk image is uploaded from a PC using the XMODEM protocol (original
XMODEM with 128 byte blocks and checksum). Compatible disk images files typi-
cally have a “.dsk” extension and are 330K or 75K in size (8 inch, minidisk).
The floppy image transfer is done at a higher baud rate to reduce the trans-
fer time. The default transfer rate is 115,200 baud. This rate can be changed
in the “Baud Rate for Floppy Load/Save” option in the “Admin” menu.
Upon selecting the “Insert Floppy” option, the monitor confirms the operation
and prompts for a description of the new disk. The PC baud rate should then
be set to 115,200 baud after which the XMODEM send operation can be initiated
on the PC. If using TeraTerm, a convenient shortcut is pressing CTRL-1 to set
the baud rate to 115,200 baud. The new baud rate can be seen in the TeraTerm
title bar.
When the transfer completes, the user is prompted to return the PC baud rate
to 9600 baud. If using TeraTerm, a convenient shortcut is pressing CTRL-9 to
return the baud rate to 9600 baud. The new baud rate can be seen in the Ter-
aTerm title bar. This sequence is shown below:
===== Insert Floppy (Load Content) =====
This will over-write "Altair DOS." Are you sure (y/n)? y
Enter floppy description: New Disk
Step 1: Set terminal computer baud rate to 115.2K
Step 2: Start XMODEM file SEND after setting the new baud rate...
(XMODEM transfer occurs here...)
Return terminal computer to 9600 baud, then press return:
If the XMODEM transfer must be aborted, first stop the transfer from the PC
end, then abort the Clone’s reception by raising and releasing the left AUX
switch.
3. Save Floppy Content to PC
This menu option is used to write a floppy disk image back to a PC for ar-
chiving. The floppy disk image is downloaded to the PC using the XMODEM pro-
tocol (original XMODEM with 128 byte blocks and checksum). The floppy image
transfer is done at a higher baud rate to reduce the transfer time. The de-
fault transfer rate is 115,200 baud. This rate can be changed in the “Baud
Rate for Floppy Load/Save” option the “Admin” menu.
Upon selecting the “Save Floppy” option, the monitor confirms the operation
and prompts for the baud rate change. The PC baud rate should be set to
115,200 baud after which the XMODEM receive operation can be initiated on the
PC. If using TeraTerm, a convenient shortcut is pressing CTRL-1 to set the
baud rate to 115,200 baud. The new baud rate can be seen in the TeraTerm ti-
tle bar.
When the transfer completes, the user is prompted to return the PC baud rate
to 9600 baud. If using TeraTerm, a convenient shortcut is pressing CTRL-9 to
return the baud rate to 9600 baud. The new baud rate can be seen in the Ter-
aTerm title bar. This sequence is shown below:
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