13 The BIOS
Flash-ROM has only 8 bit data-bus width. Within the RAM 32 bit are available so that
the firmware runs significantly faster.
The loading takes some time and is displayed with the tuning display which lits every
second LED. After unpacking and loading the firmware the BIOS has finished its job and
now the firmware is responsible for controlling the PTC-IIex.
13.2
Activating the BIOS
As the PTC-IIex has no switches to let the user express the intention to operate it with the
BIOS a special procedure is used to activate the BIOS.
The PTC-IIex performs a LED test when powered on. This test has 2 phases, first the
LED´s are red and afterwards they appear green. When the PTC-IIex is switched OFF
again whilest in the second LED phase (green), then at next power up it will come with
the BIOS. Being in the BIOS the PTC-IIex indicates by only lighting the green Connected
LED.
The BIOS can be terminated by switching the unit OFF again. This can also be done with
the OFF command of the BIOS (refer to
13.3.5
on page
162
). At next power-on it will
start the firmware again.
Some experience may be necessary to hit the right moment for switching off. If it does
not work the first time just try it again.
Remark:
When switched off whilst the first LED test phase (red) the SERBaud
paramater is resetted to AUTO (refer to
6.86
on page
72
or
13.3.7
on page
163
).
13.3
BIOS commands
13.3.1
DAte
Default setting: none
Parameter: DD.MM.YY Desired
date.
Identical to the
DAte
command in the PACTOR firmware.
DAte
is used to set or read the PTC calendar. If
DAte
is entered without a parameter, the
PTC-IIex displays the current date. All positions have to be entered. Leading zeros must
not be omitted. The hyphen for separation are not necessary. Faulty inputs cause incorrect
programming of the clock chip!
From 01.01.1990 up to 31.12.2089, the day of the week is automatically calculated from
the date. Thus your PTC-IIex is well equipped for the future!
Required date Sunday 24th March 1991.
cmd:
DA
24.03.91 <Return>
Or in shortform
cmd:
DA
240391 <Return>
161
Summary of Contents for PTC-IIex
Page 14: ...List of Figures and Tables XII...
Page 30: ...3 Installation 16...
Page 108: ...7 Audio 94...
Page 126: ...8 FAX 112...
Page 173: ...12 SYStest 159...
Page 183: ...14 Circuit Description 169...
Page 195: ...15 Basics 181...
Page 201: ...B Technical Data 187...
Page 202: ...C Layout Appendix C 19 Layout B 1 Motherboard Figure B 1 Motherboard 188...
Page 203: ...C Layout 189...
Page 215: ...Index 202...
