Font And Pitch Selection Operations; Program Reload Mode; Reprogramming Operation; Bootstrap - Epson DLQ-3000 Service Manual

Product Description

1.4.6.3 Font and Pitch Selection Operations

(1) When the font or pitch selection phase starts, the currently selected default font or default
pitch is displayed with "*".
(2)
Press the ~ (next) and ? (previous) button to the desired font or pitch, and press the+ (enter)
button to select it. Then the selected font or pitch is displayed with "*".
Press the SelecType button to exit from the font or pitch selection phase. By pressing the
(3)
that, the SelecType initialization is performed automatically and the printer is returned to the
stand-by state. The user's settings are effective at once and remain in effect until they are
changed again.

1.4.7 Program Reload Mode

The printer has a 128K byte Flash-EEPROM as a printer control software storage and a boot-strap
program in a Mask-ROM. This Flash-EEPROM can electrically erase all the data in itself at once
and reprogram. Using this program reload mode, the printer control software can be changed
completely. The new software file can be transmitted to the printer through the built-in parallel
interface with the IPL (Initial Program Loader) file. At first, the built-in bootstrap program loads
the IPL file in the printer's RAM then jumps to the IPL start address. After that, the IPL program
can control the printer.
reprograms the Flash-EEPROM. Finally, the IPL program jumps to the new software start address
in the reprogrammed Flash-EEPROM.

1.4.7.1 Reprogramming Operation

(1) Turn on the printer while the TEAR-OFF, LF/FF, LOAD/EJECT and PAUSE buttons are
depressed.
Transmit the IPL file through the built-in parallel interface. If the IPL ID code is not correct,
(2)
the printer enter a fatal error state. The printer is also in a fatal error state when a sum error
occurs during IPL file transfer. The IPL file must be Intel-hex format.
Transmit the new printer software file to the printer. At this time, the printer is controlled by
(3)
the IPL program.

1.4.7.2 Bootstrap

The figure below shows a bootstrap program flow.
Boot-strap Start
1
Is reprogram
it
mode?
O K
Is it OK
Y E S
Start IPL on RAM
(Jump to 07 FFOOH)
The IPL program loads the new printer control software file and
Start current Flash-E EPROM software.
0
' (jump to OO0400H)
If Flash-E EPROM's program is not proper,
display "Unproper F/W" and get into the
fatal error state.
Display "Sum Error" or "Buffer Over" message.
Then fatal error state.
N O
Display "IPL ID Error" message.
Then fatal error state.
1-10. Bootstrap Program Flow
Figure
. . .