Print_Str_d not writing to screen correctly, what's going on

[D-Type]

I have a program I'm working on that puts a grid of characters on the screen using the BIOS Print_Str_d function. 

If I print a one-character string, all that's displayed is a dot or at best a dash in the top raster line of the character 'bitmap'.

If I print a two-or-more characters string, e.g. by adding a trailing non-printing character e.g. $20 space, it displays fine.

Is this normal behaviour, perhaps due to beam switch-on time?

Note, I'm doing this on a real Vectrex with VecFever, with v4ecartflags = 10F0 i.e. Fast Menu Switch turned off, which breaks Print_Str_d.

Any thoughts appreciated...

[Malban]

Hi,
that is correct, PrintStr from the BIOS works only with strings of length of 3 characters and more.

I mentioned that somewhere before - but can't find it.

This is due to the calculation algorythm used to "go back" for the next raster line.

Malban

[D-Type]

Ah-ha! That explains it then, thanks for the feedback. I did check with your tutorial, but didn't see anything mentioned.