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MostBASICS,however,arenotquitethatstraightforward.Forexample,the
IBM-PCwillgiveyou a printoutsimilarto Figure2-6.
1
00 01 02 03 04 05 06 07
OF 10 11 12 13 14 15 16
20 21 .?2 23 24 25 26 27
30 31 32 33 34 35 36 37
40 41 42 43 44 45 46 47
50 51 52 53 54 55 56 57
60 61 62 63 64 65 66 67
70 71 72 73 74 75 76 77
80 81 82 83 84 85 86 87
90 91 92 93 94 95 96 97
AO Al AZ A3 A4 A5 A6 A7
E70 B1 B2 B3 B4 B5 B6 87
CO Cl C2 C3 C4 C5 C6 C7
DO D1 02 03 D4 05 D6 07
EO El E2 E3 E4 ES E6 E7
FO F1 F2 F3 F4 F5 F6 F7
OD OA
08 09 OA 06 OC 00 OA OE
17 18 19 IB IC ID IE IF
28 29 2A 26 ZC 2D 2E 2F
38 39 3A 3B 3C 30 3E 3F
48 49 4A 46 4C 40 4E 4F
58 59 5A 56 5C 5D 5E 5F
68 69 6A 66 6C 6D 6E 6F
78 79 7A 7F3 7C 70 7E 7F
88 89 8A BB 8C 8D 8E 8F
98 99 9A 96 9C 90 9E 9F
A8 A9 AA AB AC AD AE AF
68 69 8A BB BC BD BE BF
C8 C9 CA CB CC CD CE CF
D8 D9 DA DB DC DD OE DF
E8 E9 EA EB EC ED EE EF
F8 F9 FA FB FC FD FE FF
. .. . . .
. . . . . .
!“#$%&’ ()*+.-./
0123456789:;<=>?
@ABCDEFGHIJKLMNO
PQRSTUVWXYZ[\]”-
‘abcdefghijklmno
pqrstuvwxyz{j)-.
. . . . .
. . . . . . . . . . . . .
. . . . . . . . . . . .
. . . . . . . . . . . .
. . . . . . . . . . . . .
. . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. .
Flgure2-& Samplehexadecimal dumpwithlBM-PC
WhentheIBM-PCBASICinterpretersendshex codeOD(carriagereturn)
it adds an extra hex OA(line feed). Hex code 1A (end-of-file)also gets
specialtreatment:the interpreterdoes not send it at all. This can cause
problemswitigrapticsordowtioadcharacterdata.HoweveLyoucans0lve
thisproblembychangingline 30 in theprecedingprogramandaddingthe
codingshownbdow.
Codingfor IBM-PCwithmonochromedisplay:
30 GOSUB 100
100 X=INP(&H3BD)
:IF X<128 THEN 100
110 OUT &H3BC,I :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 &H378,1 :OUT &H37A,S :OUT &H37A,4
l~o RETURN