Screen behaviour under CP/M2

[FloppySoftware]

Hi all!

Some time ago (2015!) I tried to port my TE text editor to the CPC under CP/M 2.

But due to a weird screen behaviour I left it in a dark box waiting for better times. 

I thought the better times were now but I am facing the same behaviour. 

The issue is that when printing characters on screen, sometimes the cursor goes some lines down, write the character there and returns to the next right position some lines up. 

Also note that the text "Help" in the menu is not centered I don't know why.

The sequence is:

   
• wait for character input
• write the character if printable (>= 32)
• so on

TE does input / output using CP/M BIOS calls but I have tried with BDOS functions and the behaviour is the same.

I tried the ROM for the CPC6128 v3 Basic 1.1 with WinAPE, Caprice32 and other emulators with the same result.

Any hints please?

[angelcaio]

One difference I remember is that the CP / M 2.2 of the CPCs did not emulate the Zenith H19 console as in CP / M Plus, but used the same control codes for the screen as in Basic.
I don't know if it will help you.

[FloppySoftware]

One difference I remember is that the CP / M 2.2 of the CPCs did not emulate the Zenith H19 console as in CP / M Plus, but used the same control codes for the screen as in Basic.
I don't know if it will help you.

I know that, thanks.

IFAIK I'm using the right screen scape sequences.


And the issue occurs just printing regular characters... sometimes.