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Hang on, the 68k is big-endian --- I'm extracting words (and bytes) from longs

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incorrectly.
This commit is contained in:
David Given 2018-06-06 12:49:21 +09:00
parent 2cf39be752
commit 4b26f75d23
2 changed files with 5 additions and 5 deletions
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4
plat/linux68k/emu/m68kconf.h
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@ -56,8 +56,8 @@
/* ======================================================================== */ /* ======================================================================== */
/* Turn ON if you want to use the following M68K variants */ /* Turn ON if you want to use the following M68K variants */
#define M68K_EMULATE_010 OPT_ON #define M68K_EMULATE_010 OPT_OFF
#define M68K_EMULATE_EC020 OPT_ON #define M68K_EMULATE_EC020 OPT_OFF
#define M68K_EMULATE_020 OPT_ON #define M68K_EMULATE_020 OPT_ON

6
plat/linux68k/emu/sim.c
View file

@ -84,7 +84,7 @@ unsigned int cpu_read_long(unsigned int address)
case 0x00: return INIT_SP; case 0x00: return INIT_SP;
case 0x04: return INIT_PC; case 0x04: return INIT_PC;
case 0x80: syscall(); return 0x10000; case 0x80: syscall(); return 0x10000;
case 0x10000: return 0x4e73; /* rte */ case 0x10000: return 0x4e734e73; /* rte; rte */
case 0x10004: return 0; case 0x10004: return 0;
default: return READ_LONG(g_ram, transform_address(address)); default: return READ_LONG(g_ram, transform_address(address));
} }
@ -94,14 +94,14 @@ unsigned int cpu_read_long(unsigned int address)
unsigned int cpu_read_word(unsigned int address) unsigned int cpu_read_word(unsigned int address)
{ {
unsigned int l = cpu_read_long(address & ~3); unsigned int l = cpu_read_long(address & ~3);
l >>= (address & 2) * 8; l >>= 16 - (address & 2)*8;
return l & 0xffff; return l & 0xffff;
} }
unsigned int cpu_read_byte(unsigned int address) unsigned int cpu_read_byte(unsigned int address)
{ {
unsigned int l = cpu_read_long(address & ~3); unsigned int l = cpu_read_long(address & ~3);
l >>= (address & 3) * 8; l >>= 24 - (address & 3)*8;
return l & 0xff; return l & 0xff;
} }