MagTek HALF CARD PORT - Manual (Page 27)

Section 3. Commands, Formats, Timing
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Table 3-4 shows transmission examples in the buffered mode with STX and ETX included:
Table 3-4. Transmission Data Examples in Buffered Mode With STX and ETX Included
Action Port Powered Insert Reader Data PC Data
PC Sets Buffered Mode <ESC>B
(0x1B, 0x42)
PC Sets STX <ESC>S
(0x1B, 0x53)
PC Sets ETX <ESC>E
(0x1B, 0x45)
Card Inserted <STX>1<ETX> (0x02, 0x31, 0x03)
PC Sends Inquiry <ESC>I
(0x1B, 0x49)
If bad read on insert, reader sends error
status <STX>%E?;E?1<ETX>(0x02,0x25,
0x45,0x3F,0x3D,0x45,0x3F,0x31,0x03)
If good read on insert, sends card data <STX>%<track 1 data>?;<track 2
data>?1<ETX>
Card removed <STX>0<ETX> (0x02, 0x30, 0x03)
PC Sends Inquiry <ESC>I
(0x1B, 0x49)
Sends card data <STX>%<track 1 data>?;<track 2
data>?0<ETX>
PC Sends Inquiry <ESC>I
(0x1B, 0x49)
Sends card data (data remains in buffer
until a release command has been
received) <STX>%<track 1 data>?;<track 2
data>?0<ETX>
Buffer cleared (released) <ESC>R
(0x1B, 0x52)
PC Sends Inquiry <ESC>I
(0x1B, 0x49)
Sends status <STX>0<ETX> (0x02, 0x30, 0x03)