diff options
Diffstat (limited to 'hw/vga.c')
| -rw-r--r-- | hw/vga.c | 46 |
1 files changed, 43 insertions, 3 deletions
@@ -50,6 +50,10 @@ //#define DEBUG_VGA //#define DEBUG_VGA_MEM +//#define DEBUG_VGA_REG + +//#define DEBUG_S3 +#define CONFIG_S3VGA #define MSR_COLOR_EMULATION 0x01 #define MSR_PAGE_SELECT 0x20 @@ -252,6 +256,9 @@ static uint32_t vga_ioport_read(CPUX86State *env, uint32_t addr) break; case 0x3c5: val = s->sr[s->sr_index]; +#ifdef DEBUG_VGA_REG + printf("vga: read SR%x = 0x%02x\n", s->sr_index, val); +#endif break; case 0x3c7: val = s->dac_state; @@ -274,6 +281,9 @@ static uint32_t vga_ioport_read(CPUX86State *env, uint32_t addr) break; case 0x3cf: val = s->gr[s->gr_index]; +#ifdef DEBUG_VGA_REG + printf("vga: read GR%x = 0x%02x\n", s->gr_index, val); +#endif break; case 0x3b4: case 0x3d4: @@ -282,6 +292,14 @@ static uint32_t vga_ioport_read(CPUX86State *env, uint32_t addr) case 0x3b5: case 0x3d5: val = s->cr[s->cr_index]; +#ifdef DEBUG_VGA_REG + printf("vga: read CR%x = 0x%02x\n", s->cr_index, val); +#endif +#ifdef DEBUG_S3 + if (s->cr_index >= 0x20) + printf("S3: CR read index=0x%x val=0x%x\n", + s->cr_index, val); +#endif break; case 0x3ba: case 0x3da: @@ -354,6 +372,9 @@ static void vga_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) s->sr_index = val & 7; break; case 0x3c5: +#ifdef DEBUG_VGA_REG + printf("vga: write SR%x = 0x%02x\n", s->sr_index, val); +#endif s->sr[s->sr_index] = val & sr_mask[s->sr_index]; break; case 0x3c7: @@ -378,6 +399,9 @@ static void vga_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) s->gr_index = val & 0x0f; break; case 0x3cf: +#ifdef DEBUG_VGA_REG + printf("vga: write GR%x = 0x%02x\n", s->gr_index, val); +#endif s->gr[s->gr_index] = val & gr_mask[s->gr_index]; break; case 0x3b4: @@ -386,6 +410,9 @@ static void vga_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) break; case 0x3b5: case 0x3d5: +#ifdef DEBUG_VGA_REG + printf("vga: write CR%x = 0x%02x\n", s->cr_index, val); +#endif /* handle CR0-7 protection */ if ((s->cr[11] & 0x80) && s->cr_index <= 7) { /* can always write bit 4 of CR7 */ @@ -403,6 +430,7 @@ static void vga_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) s->cr[s->cr_index] = val; break; +#ifdef CONFIG_S3VGA /* S3 registers */ case 0x2d: case 0x2e: @@ -422,10 +450,16 @@ static void vga_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) v = val & 3; s->cr[0x69] = (s->cr[69] & ~0x0c) | (v << 2); break; +#endif default: s->cr[s->cr_index] = val; break; } +#ifdef DEBUG_S3 + if (s->cr_index >= 0x20) + printf("S3: CR write index=0x%x val=0x%x\n", + s->cr_index, val); +#endif break; case 0x3ba: case 0x3da: @@ -507,7 +541,6 @@ static uint32_t vga_mem_readl(uint32_t addr) return v; } - /* called for accesses between 0xa0000 and 0xc0000 */ void vga_mem_writeb(uint32_t addr, uint32_t val) { @@ -588,7 +621,7 @@ void vga_mem_writeb(uint32_t addr, uint32_t val) case 3: /* rotate */ b = s->gr[3] & 7; - val = ((val >> b) | (val << (8 - b))); + val = (val >> b) | (val << (8 - b)); bit_mask = s->gr[8] & val; val = mask16[s->gr[0]]; @@ -787,15 +820,20 @@ static int update_basic_params(VGAState *s) full_update = 0; /* compute line_offset in bytes */ + line_offset = s->cr[0x13]; +#ifdef CONFIG_S3VGA v = (s->cr[0x51] >> 4) & 3; /* S3 extension */ if (v == 0) v = (s->cr[0x43] >> 2) & 1; /* S3 extension */ - line_offset = s->cr[0x13] | (v << 8); + line_offset |= (v << 8); +#endif line_offset <<= 3; /* starting address */ start_addr = s->cr[0x0d] | (s->cr[0x0c] << 8); +#ifdef CONFIG_S3VGA start_addr |= (s->cr[0x69] & 0x1f) << 16; /* S3 extension */ +#endif /* line compare */ line_compare = s->cr[0x18] | @@ -1290,11 +1328,13 @@ void vga_update_display(void) void vga_reset(VGAState *s) { memset(s, 0, sizeof(VGAState)); +#ifdef CONFIG_S3VGA /* chip ID for 8c968 */ s->cr[0x2d] = 0x88; s->cr[0x2e] = 0xb0; s->cr[0x2f] = 0x01; /* XXX: check revision code */ s->cr[0x30] = 0xe1; +#endif s->graphic_mode = -1; /* force full update */ } |
