ZX81 FOR NEXT Sytax Error

2015-07-12 Thread Marco Rauhut
Hello; I have here my first Sinclair ZX81 Computer with 16K Ram extension. To check if the Ram extension works properly i want to write an small Basic program to check each byte. The first thing i struggle on is that 1 could not type in a for next statement. 10 FOR I = 17000 TO 32768 if I type

Re: ZX81 FOR NEXT Sytax Error

2015-07-12 Thread Ian McLaughlin
Marco, All keywords on the ZX81 have to be single keypress-type words - not typed out. The “TO” in your FOR loop is typed by pressing Shift-4. Don’t type “T” “O” or you will get a syntax error. Ian > On Jul 12, 2015, at 11:21 PM, Marco Rauhut wrote: > > Hello; > > I have here my first Sinc

Re: ZX81 FOR NEXT Sytax Error

2015-07-13 Thread Adam Sampson
Marco Rauhut writes: > if I type in this line, the ZX81 mark an inverted "S" just before "TO". > 10 FOR I = 17000 "S"TO 32768 I suspect you typed " TO " (space, T, O, space) rather than using the TO keyboard (shift-4). As the manual puts it, "You must remember that it is useless trying to spell

Re: ZX81 FOR NEXT Sytax Error

2015-07-13 Thread Marco Rauhut
Thanks! Thats it. Now i also noticed the SHIFT+NEWLINE(Funktion) to switch the Cursor into inverted F. Am 13.07.2015 um 12:07 schrieb Adam Sampson: Marco Rauhut writes: if I type in this line, the ZX81 mark an inverted "S" just before "TO". 10 FOR I = 17000 "S"TO 32768 I suspect you ty