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Diffstat (limited to 'src/emu/cpu/i8x41/i8x41.h')
-rw-r--r-- | src/emu/cpu/i8x41/i8x41.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/emu/cpu/i8x41/i8x41.h b/src/emu/cpu/i8x41/i8x41.h new file mode 100644 index 00000000000..d8c55058df2 --- /dev/null +++ b/src/emu/cpu/i8x41/i8x41.h @@ -0,0 +1,88 @@ +/***************************************************************************** + * + * i8x41.h + * Portable UPI-41/8041/8741/8042/8742 emulator interface + * + * Copyright (c) 1999 Juergen Buchmueller, all rights reserved. + * + * - This source code is released as freeware for non-commercial purposes. + * - You are free to use and redistribute this code in modified or + * unmodified form, provided you list me in the credits. + * - If you modify this source code, you must add a notice to each modified + * source file that it has been changed. If you're a nice person, you + * will clearly mark each change too. :) + * - If you wish to use this for commercial purposes, please contact me at + * pullmoll@t-online.de + * - The author of this copywritten work reserves the right to change the + * terms of its usage and license at any time, including retroactively + * - This entire notice must remain in the source code. + * + * TLP (10-Jan-2003) + * Added output ports registers to the debug viewer + * Added the Clock Divider + * + *****************************************************************************/ + +#ifndef _I8X41_H +#define _I8X41_H + +#include "cpuintrf.h" + + +/* The i8x41/i8x42 input clock is divided by 15. Use it with your CPU speed */ +#define I8X41_CLOCK_DIVIDER 15 + +/* Note: + * I8X41_DATA is A0 = 0 and R/W + * I8X41_CMND is A0 = 1 and W only + * I8X41_STAT is A0 = 1 and R only + */ + + +/**************************************************************************** + * Interrupt constants + */ + +#define I8X41_INT_IBF 0 /* input buffer full interrupt */ +#define I8X41_INT_TEST1 1 /* test1 line (also counter interrupt; taken on cntr overflow) */ + + +/**************************************************************************** + * Use these in the I/O port fields of your driver for the test lines - i.e, + * { I8X41_t0, I8X41_t0, i8041_test0_r }, + * { I8X41_t1, I8X41_t1, i8041_test1_r }, + * { I8X41_ps, I8X41_ps, i8041_port_strobe_w }, + */ + +#define I8X41_t0 0x80 /* TEST0 input port handle */ +#define I8X41_t1 0x81 /* TEST1 input port handle */ +#define I8X41_ps 0x82 /* Prog pin strobe for expanded port sync */ + + +/**************************************************************************** + * The i8x41/i8x42 have 128/256 bytes of internal memory respectively + */ + +#define I8X41_intRAM_MASK 0x7f +#define I8X42_intRAM_MASK 0xff + + +enum { + I8X41_PC=1, I8X41_SP, I8X41_PSW, I8X41_T, I8X41_DATA, I8X41_DATA_DASM, + I8X41_CMND, I8X41_CMND_DASM, I8X41_STAT, I8X41_P1, I8X41_P2,I8X41_A, + I8X41_R0, I8X41_R1, I8X41_R2, I8X41_R3, I8X41_R4, I8X41_R5, I8X41_R6, I8X41_R7 +}; + + + +/**************************************************************************** + * Public Functions + */ + +extern void i8x41_get_info(UINT32 state, cpuinfo *info); + +#ifdef MAME_DEBUG +extern offs_t i8x41_dasm(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram); +#endif + +#endif /* _I8X41_H */ |