Graphics Compatibility System (GCS). Primer on Computer Graphics Programming. Programmers Reference Manual (1978)
Defense Technical Information Center · leaf 73
CHARACTER CHARM CALL URTART i UOUTLH t CALL UQRZH CX,Y,CHA*0 JP CCHAR .EQ. '•'> CALL UPENI CX. Y# * V CCHAR .EQ. 'I') CALL UHDVE <X*Y> JF CCHAR .EQ. 'DO CALL CPENl CX. Y. 'PA8HO W CCHAR .EQ. 'EO 10 TO C 90 TO l C 3$ Q€> v-5
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