#362 CLS

[Rudi B. Stranden]

User defined fonts in VGA BIOS won't persist after performing shell command: CLS (Clear screen)

I've attached an example program with assembly code.

Run example program. Type CLS.
In original DOS the fonts persists.
It does not in DOSBOX (which is either a feature or a bug) :) Imho, a bug.
(It looks like you're doing a mode change or something - I dont think CLS in original DOS is doing a mode change - it probably only clears the screenbuffer and moves the cursor position, if i am not mistaken).

[Rudi B. Stranden]

Userfont executable COM file

[Rudi B. Stranden]

Userfont assembly file

[Rudi B. Stranden]

You should try check if accumulator low bits (AL) have the same video mode before as after CLS if you're calling interrupt 10h.

[Qbix]

we do indeed do a modeset in our CLS.
(which is in the dosbox case beneficial as we don't have a mode.com to reset the screen.)

Nonetheless I consider it a bug as well.
Thanks for reporting it