/************************************************************************************ * z80/chip.h * chip/chip.h * *   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. * ************************************************************************************/#ifndef __Z80_CHIP_H#define __Z80_CHIP_H/************************************************************************************ * Included Files ************************************************************************************//************************************************************************************ * Definitions ************************************************************************************//* Bits in the Z80 FLAGS register ***************************************************/#define Z80_C_FLAG      0x01       /* Bit 0: Carry flag */#define Z80_N_FLAG      0x02       /* Bit 1: Add/Subtract flag  */#define Z80_PV_FLAG     0x04       /* Bit 2: Parity/Overflow flag */#define Z80_H_FLAG      0x10       /* Bit 4: Half carry flag */#define Z80_Z_FLAG      0x40       /* Bit 5: Zero flag */#define Z80_S_FLAG      0x80       /* Bit 7: Sign flag *//* Register access macros ***********************************************************/#ifndef __ASSEMBLY__# define getreg8(a)           (*(volatile ubyte *)(a))# define putreg8(v,a)         (*(volatile ubyte *)(a) = (v))# define getreg16(a)          (*(volatile uint16 *)(a))# define putreg16(v,a)        (*(volatile uint16 *)(a) = (v))# define getreg32(a)          (*(volatile uint32 *)(a))# define putreg32(v,a)        (*(volatile uint32 *)(a) = (v))#endif/************************************************************************************ * Public Function Prototypes ************************************************************************************/#ifndef __ASSEMBLY__#ifdef __cplusplus#define EXTERN extern "C"extern "C" {#else#define EXTERN extern#endif#undef EXTERN#ifdef __cplusplus}#endif#endif#endif  /* __Z80_CHIP_H */