Star Micronics LC-20 user manual Ill

MostBASICS, however,arenotquitethatstraightfonvardForexample,the. IBM-PCwill give you a printoutsimilarto Figure2-5.

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! “ 4+$%!%’( ) x+, -. /

O 123456789: : .::= ::?.

@ABCDEFGHIJF::LMNO PQF:STLIVWXYZ [ \ 1‘“’- ‘ abcde+g h i j l:.1mno pqh. 5tLlVW>:yZ : : ]+.

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Figure2-5.Sample hexadecimal dump with IBM-PC

When the IBM-PCBASICinterpretersendshex codeOD(carriagereturn) it adds an extra hex OA(line feed). Hex code 1A (end-of-fde)also gets special treatment:the interpreterdoes not send it at all. This can cause problemswithgraphicsordownloadcharacterdata.However,youcansolve this problemby changingline 20 in the precedingprogramand addingthe codingshownbelow.

Codingfor IBM-PCwith monochromedisplay:

20 GOSUB 100

100 O==INP(&H3BD) : IF 0<128 THEN 100

110OUT &H3BC, I : OUT &H3BE,5 : OUT &H3BE, 4

1204 RETURN

Codingfor IBM-PCwith color adapter:

20 GOSUB 100

100 O=INP (&H379 ) : IF 0<128 THEN 100

110 OUT &H378, I : OUT &H37A, 5 : OUT &H37A, 4 120 RETURN

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