emulate.c

来自「以ST公司CPU为核心的彩色电视机的完整源程序。」· C语言 代码 · 共 17 行

void use_external_font(void)
{
        SAVE_PPR;
        spp(TSTCTR_PG);                 /* page of TSTCTR (only in emulation mode) */
        TSTCTR |= TSTCTRm_intfont;      /* set external font memory use */
        RESTORE_PPR;
}

void use_internal_font(void)
{
        SAVE_PPR;
        spp(TSTCTR_PG);                 /* page of TSTCTR (only in emulation mode) */
        TSTCTR &= ~TSTCTRm_intfont;     /* set internal font memory use */
        RESTORE_PPR;
}