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According to Philips, 80C31 is a 80C52 family member with 128K internal ram and no rom

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This commit is contained in:
Couriersud 2008-10-24 21:53:09 +00:00
parent b1e8ff0a3e
commit 9be049b4b2
1 changed files with 22 additions and 5 deletions
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27
src/emu/cpu/i8051/i8051.c
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@ -474,10 +474,13 @@ struct _mcs51_regs
#define GET_M0_0 GET_BIT(TMOD, 0)
#define GET_SMOD GET_BIT(PCON, 7)
#define GET_GF1 GET_BIT(TMOD, 3)
/* Only in 80C51BH & other cmos */
#define GET_GF1 GET_BIT(TMOD, 3)
#define GET_GF0 GET_BIT(TMOD, 2)
#define GET_PD GET_BIT(TMOD, 1) /* Only in 80C51BH */
#define GET_IDL GET_BIT(TMOD, 0) /* Only in 80C51BH */
#define GET_PD GET_BIT(TMOD, 1)
#define GET_IDL GET_BIT(TMOD, 0)
/* 8052 Only flags */
#define GET_TF2 GET_BIT(T2CON, 7)
@ -1934,7 +1937,7 @@ static void i8052_reset(void)
}
/****************************************************************************
* 8052 Section
* 80C52 Section
****************************************************************************/
static void i80c52_sfr_write(size_t offset, UINT8 data)
@ -1982,6 +1985,13 @@ static void i80c52_init(int index, int clock, const void *config, int (*irqcallb
mcs51.sfr_write = i80c52_sfr_write;
}
static void i80c31_init(int index, int clock, const void *config, int (*irqcallback)(int))
{
i80c52_init(index, clock, config, irqcallback);
mcs51.ram_mask = 0x7F; /* 128 bytes of ram */
}
static void i80c52_reset(void)
{
i8052_reset();
@ -2277,9 +2287,16 @@ void i8752_get_info(UINT32 state, cpuinfo *info)
void i80c31_get_info(UINT32 state, cpuinfo *info)
{
/* according to PHILIPS datasheet this is a stripped down version
* of i80c52 with 128 bytes internal ram */
switch (state)
{
case CPUINFO_PTR_INIT: info->init = i80c51_init; break;
case CPUINFO_PTR_INIT: info->init = i80c31_init; break;
case CPUINFO_PTR_RESET: info->reset = i80c52_reset; break;
case CPUINFO_PTR_INTERNAL_MEMORY_MAP + ADDRESS_SPACE_PROGRAM: info->internal_map8 = NULL; break;
case CPUINFO_PTR_INTERNAL_MEMORY_MAP + ADDRESS_SPACE_DATA: info->internal_map8 = address_map_data_7bit; break;
case CPUINFO_STR_NAME: strcpy(info->s, "I80C31"); break;
default: i8031_get_info(state, info); break;
}