1. 1. guide

1.1 Purpose

By incorporating this library into the system under development, you can display character strings on the screen, enter data using the software keyboard, and read and write memory contents.

1.2 Commentary

• This library uses the VDP2 graphic library to build a simple debug environment on top of NBG0 on the normal scroll screen. This library cannot be used without using the VDP2 graphic library.

• This library only supports dedicated pads. This library cannot be used without using the peripheral library.

1.3 Limitations

The debug display screen uses normal scroll 0 as priority 7.
Therefore, lower the priority of other sprite surfaces and scroll surfaces as necessary.

1.4 Program description example

An example of an actual program in C language is shown below.

#include "sega_scl.h"
#include "sega_dbg.h"


void err (Uint8 * mess);



Uint16 PadData;

main ()
{
          SCL_Vdp2Init ();
          DBG_Initial (& PadData, RGB16_COLOR (31,31,31), 0);

          .......... / * Program * /

          if (......)     
                    err ("There was an error in the ~ function of main ()");
          .......... / * Program * /


}

void err (Uint8 * mess)
{
          DBG_Printf ("% s \ n", mess); / * Display message * /
          DBG_Monitor (); / * Make a simple debug environment *

}