Epson Multi-mode Data Controller MFJ-1278B - Manual (Page 109)

MFJ-1278B MULTI-MODE BASIC OPERATION
After unbiasing: bit # 7 6 5 4 3 2 1 0
data x x a a a b b b
x = don't care
a,b = first and second pixel groups
Coding: If, prior to unbiasing, the value of the data byte is an ASCII p, q, or r, then the
received byte is a sync byte. Otherwise, the received byte contains actual display information
as described above. The color level of each pixel contain in the data byte is given below:
000 001 110 111
white lightest grey darkest grey black
NOTE: If the data byte is NOT a sync byte, you must remove the 30H bias BEFORE
extracting the pixel information.
For example, if an ASCII '9' is received, then the following steps should be taken:
1. Remove bias: 39H-30H = 9H
2. Extract pixel information: aaa = 001 bbb = 001
3. Display two pixels of lighest grey level.
If an ASCII 'p', 'q', or 'r' is received, then process the byte as a sync tone. Information can be
requested on the raw data format for 16 gray level fax from MFJ Enterprises, Inc.
Transmitting FAX
The MFJ-1278B is capable of transmitting 2 level or multi-gray level pictures in the FAX
mode. To transmit FAX picture you must use a special terminal program capable of FAX
operation.
Two Level FAX Transmitting
In this section we will cover procedures for transmitting 2-level FAX images with the MFJ-
1278B. The 2-level FAX images that are transmitted by the MFJ-1278B are stored on disk,
in the format required by the MFJ-1278B. You recall the stored FAX images from disk
depending on the terminal program being used. You will need to refer to the terminal
program instructions to learn how to recall the FAX images from disk. The 2-level FAX
mode in the MFJ-1278B requires that the use of a monochrome graphics system, with
software that will run on a monochrome graphics system, such as MFJCOM by MFJ
Enterprises, Inc. The advanced terminal program, MFJ MultiCom™ does not perform 2-
level FAX operations.
Enter the FAX mode by using the MODE command. Type:
MODE FX <ENTER>