0 ' try these values:
1 ' R10 = 13, R11 = 15 (underscore cursor)
2 ' R10 = 15, R11 = 16 (block cursor)
3 ' R10 = 13, R11 = 2  (strange two-piece cursor)
4 ' add 96 R10 value for slow blink, 64 for fast blink
10 START = 13 : FINIT = 15
20 OUT 28,10 : OUT 29,START : OUT 28,11 : OUT 29,FINIT
30 PRINT START; :INPUT "(R10) ",START
40 PRINT FINIT; :INPUT "(R11) ",FINIT
50 PRINT : GOTO 20