80486DX2-66/86Box-fork
1
0
Fork 0
Code Issues Pull Requests Activity

WIP BitBLT port work

Browse Source
This commit is contained in:
Cacodemon345
2024-02-02 02:28:32 +06:00
parent e0503e6381
commit 2690132bc3
1 changed files with 64 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

66
src/video/vid_c&t_69000.c
View File

@@ -133,6 +133,7 @@ typedef struct chips_69000_t {
/* Byte counter for BitBLT port writes. */
uint8_t bytes_written;
uint8_t bytes_port[4];
} bitblt_running;
union {
@@ -721,14 +722,15 @@ chips_69000_process_pixel(chips_69000_t* chips, uint32_t pixel)
}
/* TODO: Find out from where it actually pulls the exact pattern x and y values. */
/* Also: is horizontal pattern alignment a requirement? */
if (chips->bitblt_running.bitblt.bitblt_control & (1 << 18)) {
uint8_t is_true = 0;
if (chips->bitblt_running.bitblt.bitblt_control & (1 << 19))
pattern_data = 0;
else
pattern_data = chips_69000_readb_linear(chips->bitblt_running.bitblt.pat_addr + ((vert_pat_alignment + chips->bitblt_running.count_y) & 7), chips);
pattern_data = chips_69000_readb_linear(chips->bitblt_running.bitblt.pat_addr + ((vert_pat_alignment + chips->bitblt_running.y) & 7), chips);
is_true = !!(pattern_data & (1 << (((chips->bitblt_running.bitblt.destination_addr & 7) + chips->bitblt_running.count_x) & 7)));
is_true = !!(pattern_data & (1 << (((chips->bitblt_running.bitblt.destination_addr & 7) + chips->bitblt_running.x) & 7)));
if (!is_true && (chips->bitblt_running.bitblt.bitblt_control & (1 << 17))) {
return;
@@ -737,6 +739,12 @@ chips_69000_process_pixel(chips_69000_t* chips, uint32_t pixel)
pattern_pixel = is_true ? pattern_fg : pattern_bg;
pattern_pixel &= (1 << (8 * (chips->bitblt_running.bytes_per_pixel))) - 1;
} else {
if (chips->bitblt_running.bytes_per_pixel == 1) {
pattern_pixel = chips_69000_readb_linear(chips->bitblt_running.bitblt.pat_addr
+ 8 * ((vert_pat_alignment + chips->bitblt_running.y) & 7)
+ (((chips->bitblt_running.bitblt.destination_addr & 7) + chips->bitblt_running.x) & 7), chips);
}
}
switch (chips->bitblt_running.bytes_per_pixel) {
@@ -787,6 +795,7 @@ chips_69000_setup_bitblt(chips_69000_t* chips)
chips->bitblt_running.actual_source_height = chips->bitblt.destination_height;
chips->bitblt_running.actual_destination_height = chips->bitblt.destination_height;
chips->bitblt_running.count_x = chips->bitblt_running.count_y = 0;
chips->bitblt_running.bytes_written = 0;
if (chips->bitblt.bitblt_control & (1 << 23)) {
chips->bitblt_running.bytes_per_pixel = 1 + ((chips->bitblt.bitblt_control >> 24) & 3);
@@ -877,6 +886,43 @@ chips_69000_setup_bitblt(chips_69000_t* chips)
chips_69000_bitblt_interrupt(chips);
}
void
chips_69000_bitblt_write(chips_69000_t* chips, uint8_t data) {
if (!chips->engine_active)
return;
chips->bitblt_running.bytes_port[chips->bitblt_running.bytes_written++] = data;
if (chips->bitblt_running.bytes_written == chips->bitblt_running.bytes_per_pixel) {
uint32_t source_pixel = chips->bitblt_running.bytes_port[0];
chips->bitblt_running.bytes_written = 0;
if (chips->bitblt_running.bytes_per_pixel == 1)
source_pixel = (chips->bitblt_running.bytes_port[1] << 8);
if (chips->bitblt_running.bytes_per_pixel == 2)
source_pixel = (chips->bitblt_running.bytes_port[2] << 16);
chips_69000_process_pixel(chips, source_pixel);
chips->bitblt_running.x += chips->bitblt_running.x_dir;
chips->bitblt_running.count_x++;
if (chips->bitblt_running.count_x >= chips->bitblt_running.actual_destination_width) {
chips->bitblt_running.y += chips->bitblt_running.y_dir;
chips->bitblt_running.count_y++;
chips->bitblt_running.count_x = 0;
if (chips->bitblt_running.bitblt.bitblt_control & (1 << 8)) {
chips->bitblt_running.x = chips->bitblt_running.actual_destination_width - 1;
} else
chips->bitblt_running.x = 0;
if (chips->bitblt_running.count_y > chips->bitblt_running.actual_destination_height) {
chips_69000_bitblt_interrupt(chips);
return;
}
}
}
}
uint8_t
chips_69000_read_ext_reg(chips_69000_t* chips)
{
@@ -1413,6 +1459,10 @@ void
chips_69000_writeb_mmio(uint32_t addr, uint8_t val, chips_69000_t* chips)
{
//pclog("C&T Write 0x%X, val = 0x%02X\n", addr, val);
if (addr & 0x10000) {
chips_69000_bitblt_write(chips, val);
return;
}
addr &= 0xFFF;
switch (addr & 0xFFF) {
case 0x00 ... 0x28:
@@ -1509,6 +1559,11 @@ chips_69000_writeb_mmio(uint32_t addr, uint8_t val, chips_69000_t* chips)
void
chips_69000_writew_mmio(uint32_t addr, uint16_t val, chips_69000_t* chips)
{
if (addr & 0x10000) {
chips_69000_bitblt_write(chips, val & 0xFF);
chips_69000_bitblt_write(chips, (val >> 8) & 0xFF);
return;
}
addr &= 0xFFF;
switch (addr & 0xFFF) {
default:
@@ -1521,6 +1576,13 @@ chips_69000_writew_mmio(uint32_t addr, uint16_t val, chips_69000_t* chips)
void
chips_69000_writel_mmio(uint32_t addr, uint32_t val, chips_69000_t* chips)
{
if (addr & 0x10000) {
chips_69000_bitblt_write(chips, val & 0xFF);
chips_69000_bitblt_write(chips, (val >> 8) & 0xFF);
chips_69000_bitblt_write(chips, (val >> 16) & 0xFF);
chips_69000_bitblt_write(chips, (val >> 24) & 0xFF);
return;
}
addr &= 0xFFF;
switch (addr & 0xFFF) {
default: