IBM 4400 manual Serial Matrix VFU Series Evfu Line Slewing, Data Bits Hex Dec Code Lines Slewed

Chapter 9 Serial Matrix VFU

Table 79. P-Series EVFU Line Slewing

	ASCII						Data Bits
Hex	Dec.	Code	PI	8	7	6	5	4	3	2	1	Lines Slewed
10	16	DLE	1	X	X	X	1	0	0	0	0	1
11	17	DC1	1	X	X	X	1	0	0	0	1	2
12	18	DC2	1	X	X	X	1	0	0	1	0	3
13	19	DC3	1	X	X	X	1	0	0	1	1	4
14	20	DC4	1	X	X	X	1	0	1	0	0	5
15	21	NAK	1	X	X	X	1	0	1	0	1	6
16	22	SYN	1	X	X	X	1	0	1	1	0	7
17	23	ETB	1	X	X	X	1	0	1	1	1	8
18	24	CAN	1	X	X	X	1	1	0	0	0	9
19	25	EM	1	X	X	X	1	1	0	0	1	10
1A	26	SUB	1	X	X	X	1	1	0	1	0	11
1B	27	ESC	1	X	X	X	1	1	0	1	1	12
1C	28	FS	1	X	X	X	1	1	1	0	0	13
1D	29	GS	1	X	X	X	1	1	1	0	1	14
1E	30	RS	1	X	0	0	1	1	1	1	0	15
1F	31	US	1	X	0	0	1	1	1	1	1	16
			(X = Undefined, 0, or 1) (1 = High) (0 = Low)

Serial Matrix VFU

In the Serial Matrix, Proprinter XL, and Epson FX protocols, the VFU is basically a set of preprogrammed vertical tabs. Various lines of the form are assigned vertical tabs which are then accessed by control code for rapid vertical paper movement (slewing) to the tab position. Two control codes are used for the Serial mode VFU: ESC B for single channel tab setting, and VT to execute a vertical tab. These codes and the parameters surrounding their use are described in Chapter 4, “Serial Matrix Printer Protocol,” in Chapter 5, “IBM Proprinter III XL Printer Protocol,” and in Chapter 6, “Epson FX-1050 Printer Protocol.”

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