diff options
Diffstat (limited to 'nuttx/configs/z80sim/src/z80_lowputc.c')
-rw-r--r-- | nuttx/configs/z80sim/src/z80_lowputc.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/nuttx/configs/z80sim/src/z80_lowputc.c b/nuttx/configs/z80sim/src/z80_lowputc.c new file mode 100644 index 000000000..1c8abb2a4 --- /dev/null +++ b/nuttx/configs/z80sim/src/z80_lowputc.c @@ -0,0 +1,101 @@ +/******************************************************************************** + * board/z80_lowputc.c + * + * Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ********************************************************************************/ + +/******************************************************************************** + * Included Files + ********************************************************************************/ + +#include <nuttx/config.h> +#include <sys/types.h> +#include <nuttx/irq.h> +#include <nuttx/arch.h> +#include <assert.h> +#include <debug.h> +#include "up_arch.h" +#include "os_internal.h" +#include "up_internal.h" + +/******************************************************************************** + * Definitions + ********************************************************************************/ + +/******************************************************************************** + * Public Data + ********************************************************************************/ + +/******************************************************************************** + * Private Data + ********************************************************************************/ + +/******************************************************************************** + * Private Functions + ********************************************************************************/ + +/******************************************************************************** + * Public Functions + ********************************************************************************/ + +/******************************************************************************** + * Name: up_lowputc + * + * Data sent to port 0xbe are echoed on stdout by the simulation + * + ********************************************************************************/ + +void up_lowputc(char ch) __naked +{ + _asm + ld a, #2(sp) + out #0xbe, a + ret + _endasm; +} + +/******************************************************************************** + * Name: up_lowgetc + * + * Data from stdin can be received on port 0xbe in the simulation + * + ********************************************************************************/ + +char up_lowgetc(void) __naked +{ + _asm + in #0xbe, a + ld l, a + ld h, #0 + ret + _endasm; +} |