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yoursystempassesthecodesdirectlytothepMterwithoutchangingthem,
youwillget a printoutlikeFigure5-5.
MostBASICS,however,arenotquitethatstraightforward.Forexample,the
IBM-PCwillgiveyou aprintoutsimilarto Figure5-6.
CIO 01 02 O?, 04 05 06 07
0 B 09 OA OB OC 0[1 OA OE
0 F 1 (; ‘ 1 1 ; : 3 14 15 16
17 18 19 I 8 1c I D : E 1F
.,0 ~ , ~ ~ ~~ ~ q ~ ~ ~ ~ ; ~
28 29 2 A ?F) i’C 2[! 2 f 2 F
30 31 32 3:3 34 35 36 31
38 39 3A 38 3C 30 3 E ‘?F
40 41 4 z 4 ? 44 45 46 47
48 49 4A 4h 4C 40 4 E 4f
50 5 1 52 5.3 54 55 5 b 5 ;’
58 5Y 5A 58 5C 50 5f SF
~ o ~ , 5 ~ ~?, 64 b 5 66 67
58 69 6A 6B 5C 60 6 E 6 F
7 G 71 72 73 74 75 7 Ij 77
78 79 7A 7t3 7C 7CI 7E 7F
80 81 62 83 84 85 86 87
88 89 8 A 8B 8C 80 8 E 8 F
~ o 91 92 93 94 95 9 @ 97
98 99 9 A 9S 9C 3D 9 E 9 F
AD A 1 A2 A3 A4 /+5 Ab A 7
A8 A$i AA AB AC ACI AC AF
B O B 1 B 2 B3 84 B 5 B ‘6 B 7
B8 89 BA BB EC BD Bf BF
C O C 1 C Z C3 C4 C 5 C 6 C7
C8 C9 CA CB CC CD CE CF
00 D 1 D Z D3 D4 LI5 06 D7“
Cl8 D 9 L)A CIB D[; l)D D E D F
[ O E 1 E 2 E 3 E4 E 5 E6 E7
E 8 E9 E A EB EC EO EE EF
FO F 1 F2 F3 F4 F5 F6 F7 F8 F9
FA F8 FC FD FE FF
OD OA
YgumS6. SamplehexadedmaldumpwithIBM-PC.
WhentheIBM-PCBASICinterpretersendshexcodeOD(carriagereturn)
itaddsanextrahexOA(linefeed).Hexcode1A(end-of-file)alsogetsspecial
t.matment:theinterpreterdoesnotsenditatall.Thiscancauseproblemswith
graphicsor downloadcharacterdata.However,youcansolvethisproblem
bychangingline30intheprecedingprogramandaddingthecodingshown
below.
Codingfor IBM-PCwithmonochromedisplay:
30 GOSUB 100
100 X=INP (&H3BD) : IF X<128 THEN 100
110 OUT &H3BC, 1 :OUT &H3BE,5 :OUT &H3BE,4
120 RETURN
Codingfor IBM-PCwithcoloradapter:
30 GOSUB 100
100 X=INP (&H379)
: IF X<128 THEN 100
110 OUT &H378 , I :OUT &H37A, 5 :OUT &H37A, 4
120 RETURN
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