. , BIOS . , BIOS DATA AREA .
BIOS , , , - . (Loop Back) , , ( ) . BIOS . , .
BIOS, , - .
, . (12) (5) , . (. 1),
. 1. LPT- Checkit
LPT- . , (Checkit, PCCheck . .), - .
DOS ( LPTn PRN ), () , ( ) STROBES.
On Line, a (Not Ready Error), Busy.
, ( ) . , ( , Basic, ).
10 OPEN "bincod.chr" FOR OUTPUT AS #1
20 FORJ=2T015
30 FOR 1=0 15
40 PRINT#1, CHR$(16*J+I);
50 NEXT I 60 PRINT#1,
70 NEXTJ
80 CLOSE #1
90 END
BINCOD.CHR, , ( ), 16 . , . .
, , (SPP) , , IEEE 1284. 50-100 /, 1-2 /, , , 2 .
- , 17 DB-25 36 Centronics.
LPT- . , , . - (, NetWare) . , .