107 lines
3.8 KiB
C
107 lines
3.8 KiB
C
/********************************************************************************
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* board/xtr_lowputc.c
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*
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* Copyright (C) 2008 Jacques Pelletier. All rights reserved.
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* Author: Jacques Pelletier
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*
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* This file is a part of NuttX and hence
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*
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* Copyright (C) 2008 Gregory Nutt. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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********************************************************************************/
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/********************************************************************************
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* Included Files
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********************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <assert.h>
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#include <debug.h>
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#include "os_internal.h"
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#include "up_internal.h"
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/* Includes trs80-m3.h for assembler call addresses */
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#include <board/board.h>
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/********************************************************************************
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* Definitions
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********************************************************************************/
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/********************************************************************************
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* Public Data
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********************************************************************************/
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/********************************************************************************
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* Private Data
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********************************************************************************/
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/********************************************************************************
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* Private Functions
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********************************************************************************/
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/********************************************************************************
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* Public Functions
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********************************************************************************/
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/********************************************************************************
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* Name: up_lowputc
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********************************************************************************/
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void up_lowputc(char ch) __naked
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{
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_asm
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ld hl, #2
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add hl, sp
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ld a, (hl)
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call _TRS80_M3_VDCHAR ;0x0033
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ret
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_endasm;
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}
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/********************************************************************************
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* Name: up_lowgetc
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********************************************************************************/
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char up_lowgetc(void) __naked
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{
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_asm
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call _TRS80_M3_KBDSCN ;0x002b
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ld l, a
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ld h, #0
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ret
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_endasm;
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}
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