Unitech MR350MKII Barcode Reader User Manual


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3-46
ASCII code corresponded to scan code in Alphabetic mode
Alphabetic mode keyboard layout
ASCII code, ASCII code, ASCII code
[Scan code, Scan code, Scan code]
F1
??
F5
*
QZ.
ABC DEF
86
[23]
8A
[1B]
51,5A,2E
[24,25,26]
41,42,43
[27,28,29]
44,45,46
[2A,2B,2C]
F2
??
F6
?
GHI JKL MNO
87
[22]
8B
[1A]
47,48,49
[2D,2E,2F
]
4A,4B,4C
[30,31,32]
4D,4E,4F
[33,34,35]
F3
??
F7
?
PRS TUV WXY
88
[21]
8C
[19]
50,52,53
[36,37,38]
54,55,56
[39,3A,3B]
57,58,59
[3C,3D,3E]
F4
??
SHIF
T
[C] -SP+ [E]
89
[20]
1F
[18]
08
[10]
2D,20,2B
[1D,1E,1F
]
0D
[00]
Figure 3-2 ASCII code vs. scan code cross reference table (alphabetic-mode)
3.8. DOS Manager
The following MS/DOS function calls are emulated by MR350MKII. The calling
convention is identical to that of MS/DOS, i.e. INT 21H with function code in
registered AH. The parameter passing mechanism is also identical to the MS/DOS
convention. Unsupported DOS calls are returned with a completion status code
immediately. Please refer to MS/DOS Technical Reference Manual for further
details.
Standard Input/Output
01 Read stdin (wait if no key) and write it to stdout
No check on control keys (ESC)
Entry Parameters: AH = 01
Returned Values: AL = 8-bit data
unsigned char TS_stdin()
{
regs.h.ah= 1;
int86(0x21,&regs,&regs);
return(regs.h.al);
}
02 Write stdout
Entry Parameters: AH = 02
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