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|
// license:BSD-3-Clause
// copyright-holders:Sergey Svishchev, F. Ulivi
/*
HP 1LL3-0005 GPU emulation.
Used by HP Integral PC, possibly other HP products.
On IPC, memory is 4 16Kx4bit DRAM chips = 32KB total (16K words),
but firmware probes memory size and can work with 128KB memory.
Undocumented "_desktop" mode requires this.
Capabilities:
- up to 1024x1024 px on screen
- lines
- rectangles
- area fill with user-defined pattern
- 16x16 user-defined proportional font, with automatic cursor
- 16x16 user-defined sprite for mouse cursor (not a sprite layer)
- windows with blitter (copy, fill and scroll) and clipping
To do:
- interrupt generation
- realistic timing?
- &c.
*/
#include "emu.h"
#include "hp1ll3.h"
#include "screen.h"
///*************************************************************************
// MACROS / CONSTANTS
///*************************************************************************
/*
* command types (send)
*
* 0 -- no data
* 1 -- write 1 word of data, then command
* 2 -- write 2 words of data, then command
* 3 -- write command, then 12 words of data (= CONF only)
* 4 -- write 1 word of data, then command, then write X words of data, then write NOP
*
* (read)
*
* 3 -- write command, then read 2 words of data (X & Y coordinates)
* 4 -- write 1 word of data, then command, then read X words of data, then write NOP
*/
#define NOP 0 // type 0
#define CONF 2 // type 3, configure GPU (screen size, timings...). 11 words of data.
#define DISVID 3 // type 0, disable video
#define ENVID 4 // type 0, enable video
#define WRMEM 7 // type 4, write GPU memory at offset, terminate by NOP
#define RDMEM 8 // type 4, read GPU memory from offset, terminate by NOP
#define WRSAD 9 // type 1, set screen area start address
#define WRORG 10 // type 1, set raster start address
#define WRDAD 11 // type 1, set data area start address (16x16 area fill, sprite and cursor)
#define WRRR 12 // type 1, set replacement rule (rasterop)
#define MOVEP 13 // type 2, move pointer
#define IMOVEP 14 // type 2, incremental move pointer
#define DRAWP 15 // type 2, draw line
#define IDRAWP 16 // type 2, incremental draw line
#define RDP 17 // type 3, read pointer position
#define WRUDL 18 // type 1, set user-defined line pattern (16-bit)
#define WRWINSIZ 19 // type 2, set window size
#define WRWINORG 20 // type 2, set window origin
#define COPY 21 // type 2, block copy
#define FILL 22 // type 1, fill area
#define FRAME 23 // type 0, draw rectangle
#define SCROLUP 24 // type 2, scroll up
#define SCROLDN 25 // type 2, scroll down
#define SCROLLF 26 // type 2, scroll left
#define SCROLRT 27 // type 2, scroll right
#define RDWIN 28 // type 4, read window raster
#define WRWIN 29 // type 4, write window raster
#define RDWINPARM 30
#define CR 31 // type 0, carriage return
#define CRLFx 32 // type 0, CR + LF
#define LABEL 36 // type 1, draw text
#define ENSP 38 // type 1, enable sprite
#define DISSP 39 // type 0, disable sprite
#define MOVESP 40 // type 2, move sprite
#define IMOVESP 41 // type 2, incremental move sprite
#define RDSP 42 // type 3, read sprite position
#define DRAWPX 43 // type 2, draw single pixel
#define WRFAD 44 // type 1, set font area start address
#define ENCURS 45 // type 2, enable cursor
#define DISCURS 46 // type 0, disable cursor
#define ID 63
/*
* Replacement Rules (rops). sources:
*
* - NetBSD's diofbvar.h (definitions for Topcat chip)
* - pdf/hp/9000_300/specs/A-5958-4362-9_Series_300_Display_Color_Card_Theory_of_Operation_Oct85.pdf
* refers to TOPCAT documentation p/n A-1FH2-2001-7 (not online)
*/
#define RR_FORCE_ZERO 0x0
#define RR_CLEAR RR_FORCE_ZERO
#define RR_AND 0x1
#define RR_AND_NOT_OLD 0x2
#define RR_NEW 0x3
#define RR_COPY RR_NEW
#define RR_AND_NOT_NEW 0x4
#define RR_OLD 0x5
#define RR_XOR 0x6
#define RR_OR 0x7
#define RR_NOR 0x8
#define RR_XNOR 0x9
#define RR_NOT_OLD 0xa
#define RR_INVERT RR_NOT_OLD
#define RR_OR_NOT_OLD 0xb
#define RR_NOT_NEW 0xc
#define RR_COPYINVERTED RR_NOT_NEW
#define RR_OR_NOT_NEW 0xd
#define RR_NAND 0xe
#define RR_FORCE_ONE 0xf
constexpr unsigned WS = 16; // bits in a word
constexpr uint16_t MSB_MASK = 0x8000; // Mask of MSB
//**************************************************************************
// MACROS / CONSTANTS
//**************************************************************************
#define VERBOSE_DBG 2 /* general debug messages */
#define DBG_LOG(N,M,A) \
do { \
if(VERBOSE_DBG>=N) \
{ \
if( M ) \
logerror("%11.6f at %s: %-16s",machine().time().as_double(),machine().describe_context(),(char*)M ); \
logerror A; \
} \
} while (0)
// Index of words in configuration vector
enum : unsigned
{
CONF_HOR_0 = 0, // Horizontal timing, 1st word
CONF_HOR_1 = 1, // Horizontal timing, 2nd word
CONF_HOR_2 = 2, // Horizontal timing, 3rd word
CONF_HOR_3 = 3, // Horizontal timing, 4th word
CONF_VER_0 = 4, // Vertical timing, 1st word
CONF_VER_1 = 5, // Vertical timing, 2nd word
CONF_VER_2 = 6, // Vertical timing, 3rd word
CONF_VER_3 = 7, // Vertical timing, 4th word
CONF_WPL = 8, // Words per line
CONF_LINES = 9, // Lines
CONF_OPTS = 10 // RAM size or option bits (more likely)
};
// Fields of hor/ver timing words
enum : uint16_t
{
HV_CNT_MASK = 0x3ff, // Mask of counter part
HV_ZONE_MASK = 0xc00, // Mask of zone part
HV_ZONE_0 = 0x000, // Value for zone 0
HV_ZONE_1 = 0x400, // Value for zone 1
HV_ZONE_2 = 0x800, // Value for zone 2
HV_ZONE_3 = 0xc00 // Value for zone 3
};
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// devices
DEFINE_DEVICE_TYPE(HP1LL3, hp1ll3_device, "hp1ll3", "Hewlett-Packard 1LL3-0005 GPU")
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// hp1ll3_device - constructor
//-------------------------------------------------
hp1ll3_device::hp1ll3_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, HP1LL3, tag, owner, clock)
, device_video_interface(mconfig, *this)
, m_vram_size(16)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void hp1ll3_device::device_start()
{
const rectangle &visarea = screen().visible_area();
// register for state saving
save_item(NAME(m_conf));
screen().register_screen_bitmap(m_bitmap);
m_videoram = std::make_unique<uint16_t[]>(m_vram_size);
save_pointer(NAME(m_videoram) , m_vram_size);
m_ram_addr_mask = uint16_t(m_vram_size - 1);
m_horiz_pix_total = visarea.max_x + 1;
m_vert_pix_total = visarea.max_y + 1;
}
void hp1ll3_device::device_reset()
{
m_rd_ptr = m_wr_ptr = m_command = 0;
m_sad = m_fad = m_dad = m_org = m_rr = m_udl = 0;
m_enable_video = m_enable_cursor = m_enable_sprite = m_busy = false;
}
uint16_t hp1ll3_device::get_pix_addr(uint16_t x, uint16_t y) const
{
return m_org + y * m_conf[CONF_WPL] + x / WS;
}
inline void hp1ll3_device::point(int x, int y, bool pix, const uint16_t masks[])
{
uint16_t offset = get_pix_addr(x, y);
uint16_t pix_mask = MSB_MASK >> (x % WS);
rmw_rop(offset, pix ? ~0 : 0, pix_mask, masks);
}
// Bresenham algorithm -- from ef9365.cpp
void hp1ll3_device::line(int x1, int y1, int x2, int y2)
{
int dx;
int dy,t;
int e;
int x,y;
int incy;
int diago,horiz;
unsigned char c1;
uint16_t rop_masks[4];
get_rop_masks(m_rr, rop_masks);
uint16_t udl_scan = MSB_MASK;
c1 = 0;
incy = 1;
if (x2 > x1)
dx = x2 - x1;
else
dx = x1 - x2;
if (y2 > y1)
dy = y2 - y1;
else
dy = y1 - y2;
if (dy > dx)
{
t = y2;
y2 = x2;
x2 = t;
t = y1;
y1 = x1;
x1 = t;
t = dx;
dx = dy;
dy = t;
c1 = 1;
}
if (x1 > x2)
{
t = y2;
y2 = y1;
y1 = t;
t = x1;
x1 = x2;
x2 = t;
}
horiz = dy << 1;
diago = (dy - dx) << 1;
e = (dy << 1) - dx;
if (y1 <= y2)
incy = 1;
else
incy = -1;
x = x1;
y = y1;
if (c1)
{
do
{
point(y, x, m_udl & udl_scan,rop_masks);
udl_scan >>= 1;
if (!udl_scan)
udl_scan = MSB_MASK;
if (e > 0)
{
y = y + incy;
e = e + diago;
}
else
{
e = e + horiz;
}
x++;
} while (x <= x2);
}
else
{
do
{
point(x, y, m_udl & udl_scan,rop_masks);
udl_scan >>= 1;
if (!udl_scan) {
udl_scan = MSB_MASK;
}
if (e > 0)
{
y = y + incy;
e = e + diago;
}
else
{
e = e + horiz;
}
x++;
} while (x <= x2);
}
}
void hp1ll3_device::get_font(uint16_t& font_data, uint16_t& font_height) const
{
font_data = m_fad + rd_video(m_fad + 1) + 2;
font_height = rd_video(m_fad);
}
void hp1ll3_device::label(uint8_t chr, int width)
{
draw_cursor_sprite();
uint16_t font_data;
uint16_t font_height;
get_font(font_data, font_height);
Rectangle clip = get_window();
Rectangle dst{{ m_cursor_x, m_cursor_y }, { uint16_t(width), font_height }};
bitblt(font_data + chr * 16, 16, 16, Point { 0, 0 }, clip, dst, m_rr);
m_cursor_x += width;
draw_cursor_sprite();
}
void hp1ll3_device::wr_video(uint16_t addr, uint16_t v)
{
m_videoram[addr & m_ram_addr_mask] = v;
}
uint16_t hp1ll3_device::rd_video(uint16_t addr) const
{
return m_videoram[addr & m_ram_addr_mask];
}
void hp1ll3_device::get_rop_masks(uint16_t rop, uint16_t masks[])
{
masks[0] = BIT(rop, 0) ? ~0 : 0;
masks[1] = BIT(rop, 1) ? ~0 : 0;
masks[2] = BIT(rop, 2) ? ~0 : 0;
masks[3] = BIT(rop, 3) ? ~0 : 0;
}
uint16_t hp1ll3_device::apply_rop(uint16_t old_pix, uint16_t new_pix, uint16_t glob_mask, const uint16_t masks[])
{
uint16_t diff0 = old_pix & new_pix;
uint16_t diff1 = ~old_pix & new_pix;
uint16_t diff2 = old_pix & ~new_pix;
uint16_t diff3 = ~old_pix & ~new_pix;
// The idea here is that ROP is forced to be "RR_OLD" for all zero bits in glob_mask
// so that the corresponding bits in new_pix are ignored
return
((masks[0] | ~glob_mask) & diff0) |
(masks[1] & glob_mask & diff1) |
((masks[2] | ~glob_mask) & diff2) |
(masks[3] & glob_mask & diff3);
}
void hp1ll3_device::rmw_rop(uint16_t addr, uint16_t new_pix, uint16_t glob_mask, const uint16_t masks[])
{
wr_video(addr, apply_rop(rd_video(addr), new_pix, glob_mask, masks));
}
void hp1ll3_device::clip_coord(int size_1, int &p1, int origin_clip, int size_clip, int &origin_2, int &size_2) const
{
// origin_1 is implicitly 0
int corner_2 = origin_2 + size_2;
// Clip origin_2 & p1 w.r.t. clip rectangle
int t = origin_2 - origin_clip;
if (t < 0)
{
p1 -= t;
origin_2 = origin_clip;
}
// Clip size_2 w.r.t. clip rectangle
int corner_clip = origin_clip + size_clip;
if (corner_2 > corner_clip)
size_2 = corner_clip - origin_2;
// Clip size_2 w.r.t. rectangle 1 (whose origin is 0,0)
t = p1 + size_2 - size_1;
if (t > 0)
size_2 -= t;
}
bool hp1ll3_device::bitblt(uint16_t src_base_addr, unsigned src_width, unsigned src_height, Point src_p,
const Rectangle &clip_rect, const Rectangle &dst_rect, uint16_t rop, bool use_m_org)
{
DBG_LOG(3,0,("bitblt %04x,%u,%u,(%u,%u),(%u,%u,%u,%u),(%u,%u,%u,%u),%u\n", src_base_addr,
src_width,
src_height,
src_p.x,
src_p.y,
clip_rect.origin.x, clip_rect.origin.y, clip_rect.size.x, clip_rect.size.y,
dst_rect.origin.x, dst_rect.origin.y, dst_rect.size.x, dst_rect.size.y,
rop));
int src_x = src_p.x;
int dst_x = dst_rect.origin.x;
int dst_width = dst_rect.size.x;
int src_y = src_p.y;
int dst_y = dst_rect.origin.y;
int dst_height = dst_rect.size.y;
// Clip x-coordinates
clip_coord(src_width, src_x, clip_rect.origin.x, clip_rect.size.x, dst_x, dst_width);
// Clip y-coordinates
clip_coord(src_height, src_y, clip_rect.origin.y, clip_rect.size.y, dst_y, dst_height);
DBG_LOG(3,0,("bitblt (%u,%u) (%u,%u,%u,%u)\n", src_x, src_y, dst_x, dst_y, dst_width, dst_height));
if (dst_width <= 0 || dst_height <= 0)
return false;
unsigned dst_rounded_width = m_conf[CONF_WPL] * WS;
// p1_pix & p2_pix point to a uniquely identified pixel in video RAM
unsigned p1_pix = unsigned(src_base_addr) * WS + src_x + src_width * src_y;
unsigned p2_pix = unsigned(use_m_org ? m_org : m_sad) * WS + dst_x + dst_rounded_width * dst_y;
DBG_LOG(3,0,("bitblt p1_pix=%u p2_pix=%u\n", p1_pix, p2_pix));
uint16_t rop_masks[4];
get_rop_masks(rop, rop_masks);
if (p1_pix < p2_pix)
{
// Move block going up (decrease y)
p1_pix += dst_height * src_width + dst_width - 1;
p2_pix += dst_height * dst_rounded_width + dst_width - 1;
DBG_LOG(3,0,("bitblt rev p1_pix=%u p2_pix=%u\n", p1_pix, p2_pix));
while (dst_height--) {
p1_pix -= src_width;
p2_pix -= dst_rounded_width;
rowbltneg(p1_pix, p2_pix, dst_width, rop_masks);
}
}
else
{
// Move block going down (increase y)
DBG_LOG(3,0,("bitblt fwd\n"));
while (dst_height--)
{
rowbltpos(p1_pix, p2_pix, dst_width, rop_masks);
p1_pix += src_width;
p2_pix += dst_rounded_width;
}
}
return true;
}
void hp1ll3_device::rowbltpos(unsigned p1_pix, unsigned p2_pix, int width, const uint16_t masks[])
{
// p1_pix and p2_pix point to the leftmost pixel of the row
while (width > 0)
{
unsigned p1_word = p1_pix / WS;
unsigned p1_bit = p1_pix % WS;
// Get src pixels and align to MSB
uint16_t new_pix = rd_video(p1_word) << p1_bit;
if (p1_bit)
new_pix |= rd_video(p1_word + 1) >> (WS - p1_bit);
unsigned p2_word = p2_pix / WS;
unsigned p2_bit = p2_pix % WS;
uint16_t old_pix = rd_video(p2_word);
unsigned w = p2_bit + width;
uint16_t glob_mask = ~0;
if (p2_bit)
{
// Left end
new_pix >>= p2_bit;
glob_mask >>= p2_bit;
}
if (w < WS)
{
// Right end
glob_mask &= ~0 << (WS - w);
}
rmw_rop(p2_word, new_pix, glob_mask, masks);
DBG_LOG(3,0,("rowbltpos %04x %04x %04x>%04x %u %u %u\n", old_pix, new_pix, glob_mask, rd_video(p2_word), p1_pix, p2_pix, width));
w = WS - p2_bit;
p1_pix += w;
p2_pix += w;
width -= w;
}
}
void hp1ll3_device::rowbltneg(unsigned p1_pix, unsigned p2_pix, int width, const uint16_t masks[])
{
// p1_pix and p2_pix point to the rightmost pixel of the row
while (width > 0)
{
unsigned p1_word = p1_pix / WS;
unsigned p1_bit = p1_pix % WS;
// Get src pixels and align to LSB
uint16_t new_pix = rd_video(p1_word) >> (WS - 1 - p1_bit);
if (p1_bit != (WS - 1)) {
new_pix |= rd_video(p1_word - 1) << (p1_bit + 1);
}
unsigned p2_word = p2_pix / WS;
unsigned p2_bit = p2_pix % WS;
uint16_t old_pix = rd_video(p2_word);
int w = p2_bit - width;
uint16_t glob_mask = ~0;
if (p2_bit != (WS - 1))
{
// Right end
new_pix <<= (WS - 1 - p2_bit);
glob_mask <<= (WS - 1 - p2_bit);
}
if (w >= 0)
{
// Left end
uint16_t tmp = ~0;
glob_mask &= tmp >> (w + 1);
}
rmw_rop(p2_word, new_pix, glob_mask, masks);
DBG_LOG(3,0,("rowbltneg %04x %04x %04x>%04x %u %u %u\n", old_pix, new_pix, glob_mask, rd_video(p2_word), p1_pix, p2_pix, width));
w = p2_bit + 1;
p1_pix -= w;
p2_pix -= w;
width -= w;
}
}
void hp1ll3_device::fill(const Rectangle &fill_rect, uint16_t pattern_no)
{
uint16_t pattern_addr = get_pattern_addr(pattern_no);
Point src_p{ 0, 0 };
// Align to 16x16 tiles in absolute coordinates
uint16_t start_x = fill_rect.origin.x & ~0xf;
Rectangle dst_rect{{ start_x, uint16_t(fill_rect.origin.y & ~0xf) }, { 16, 16 }};
// Iterate over vertical span
while (bitblt(pattern_addr, 16, 16, src_p, fill_rect, dst_rect, m_rr))
{
// Iterate over horizontal span
do {
dst_rect.origin.x += 16;
} while (bitblt(pattern_addr, 16, 16, src_p, fill_rect, dst_rect, m_rr));
dst_rect.origin.x = start_x;
dst_rect.origin.y += 16;
}
}
uint16_t hp1ll3_device::get_pattern_addr(uint16_t pattern_no) const
{
return m_dad + pattern_no * 16;
}
void hp1ll3_device::draw_cursor()
{
if (m_enable_cursor)
{
Rectangle dst{{ uint16_t(m_cursor_x + m_cursor_offset), m_cursor_y }, { 16, 16 }};
bitblt(get_pattern_addr(m_cursor_pattern), 16, 16, Point{ 0, 0 }, get_screen(), dst, RR_XOR, false);
}
}
void hp1ll3_device::draw_sprite()
{
if (m_enable_sprite)
{
Rectangle dst{{ m_sprite_x, m_sprite_y }, { 16, 16 }};
bitblt(get_pattern_addr(m_sprite_pattern), 16, 16, Point{ 0, 0 }, get_screen(), dst, RR_XOR, false);
}
}
void hp1ll3_device::draw_cursor_sprite()
{
draw_cursor();
draw_sprite();
}
void hp1ll3_device::set_pen_pos(Point p)
{
if (p.x != m_cursor_x || p.y != m_cursor_y)
{
draw_cursor();
m_cursor_x = p.x;
m_cursor_y = p.y;
draw_cursor();
}
}
void hp1ll3_device::set_sprite_pos(Point p)
{
if (p.x != m_sprite_x || p.y != m_sprite_y)
{
draw_sprite();
m_sprite_x = p.x;
m_sprite_y = p.y;
draw_sprite();
}
}
void hp1ll3_device::disable_cursor()
{
draw_cursor();
m_enable_cursor = false;
}
void hp1ll3_device::disable_sprite()
{
draw_sprite();
m_enable_sprite = false;
}
hp1ll3_device::Rectangle hp1ll3_device::get_window() const
{
return Rectangle{{ m_window.org_x, m_window.org_y }, { m_window.width, m_window.height }};
}
hp1ll3_device::Rectangle hp1ll3_device::get_screen() const
{
return Rectangle{{ 0, 0 }, { uint16_t(m_horiz_pix_total), uint16_t(m_vert_pix_total) }};
}
void hp1ll3_device::get_hv_timing(bool vertical, unsigned& total, unsigned& active) const
{
unsigned idx = vertical ? CONF_VER_0 : CONF_HOR_0;
// Look for active part (zone 1) & compute total time
total = 0;
active = 0;
for (unsigned i = 0; i < 4; ++i) {
unsigned cnt = (m_conf[idx + i] & HV_CNT_MASK) + 1;
total += cnt;
if ((m_conf[idx + i] & HV_ZONE_MASK) == HV_ZONE_1) {
active = cnt;
// It seems that if a zone 2 comes immediately before a zone 1, it's
// counted in the active part
unsigned idx_1 = (i + 3) % 4 + idx;
if ((m_conf[idx_1] & HV_ZONE_MASK) == HV_ZONE_2) {
active += (m_conf[idx_1] & HV_CNT_MASK) + 1;
}
}
}
DBG_LOG(2, 0, ("H/V=%d total=%u active=%u\n", vertical, total, active));
}
void hp1ll3_device::apply_conf()
{
unsigned h_total;
unsigned h_active;
unsigned v_total;
unsigned v_active;
get_hv_timing(false, h_total, h_active);
get_hv_timing(true, v_total, v_active);
// Dot clock is 4 times the GPU clock, H timings are in units of half the GPU clock
// I suspect that the GPU has a kind of "double clock" mode that is enabled by option bits in the last conf word.
// Without clock doubling, the HP-9808A video has a strange frame rate (~32Hz).
h_total *= 8;
h_active *= 8;
attotime frame_rate{clocks_to_attotime(h_total * v_total)};
screen().configure(h_total, v_total, rectangle{0, int32_t(h_active - 1), 0, int32_t(v_active - 1)}, frame_rate.attoseconds() / 4);
m_horiz_pix_total = h_active;
m_vert_pix_total = v_active;
}
uint32_t hp1ll3_device::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
if (!m_enable_video)
{
bitmap.fill(rgb_t::black());
return 0;
}
for (int y = 0; y < m_vert_pix_total; y++)
{
int const offset = m_sad + y*m_conf[CONF_WPL];
uint16_t *p = &m_bitmap.pix16(y);
for (int x = offset; x < offset + m_horiz_pix_total / 16; x++)
{
uint16_t const gfx = m_videoram[x];
*p++ = BIT(gfx, 15);
*p++ = BIT(gfx, 14);
*p++ = BIT(gfx, 13);
*p++ = BIT(gfx, 12);
*p++ = BIT(gfx, 11);
*p++ = BIT(gfx, 10);
*p++ = BIT(gfx, 9);
*p++ = BIT(gfx, 8);
*p++ = BIT(gfx, 7);
*p++ = BIT(gfx, 6);
*p++ = BIT(gfx, 5);
*p++ = BIT(gfx, 4);
*p++ = BIT(gfx, 3);
*p++ = BIT(gfx, 2);
*p++ = BIT(gfx, 1);
*p++ = BIT(gfx, 0);
}
}
copybitmap(bitmap, m_bitmap, 0, 0, 0, 0, cliprect);
return 0;
}
//-------------------------------------------------
// read - register read
//-------------------------------------------------
/*
* offset 0: CSR
*
* bit 0 gpu is busy
* bit 1 data is ready
* bit 3 vert blank time
* bit 7 out of window
*
* offset 2: data
*/
READ8_MEMBER( hp1ll3_device::read )
{
uint8_t data = 0;
if (offset == 0)
{
data = m_busy ? 1 : 0;
data |= 2;
data |= (screen().vblank() ? 8 : 0);
}
else
{
if (!(m_rd_ptr & 1))
{
switch (m_command)
{
case RDMEM:
m_io_word = rd_video(m_memory_ptr++);
break;
case RDWIN:
{
uint16_t addr = get_pix_addr(m_rw_win_x, m_rw_win_y);
unsigned bit = m_rw_win_x % WS;
int width = m_window.width + m_window.org_x - m_rw_win_x;
if (width <= 0)
{
m_command = NOP;
}
else
{
unsigned w = std::min(WS, unsigned(width));
m_io_word = rd_video(addr) << bit;
if ((bit + w) > WS)
m_io_word |= rd_video(addr + 1) >> (WS - bit);
m_io_word &= ~0 << (WS - w);
m_rw_win_x += w;
if (m_rw_win_x >= (m_window.width + m_window.org_x))
{
m_rw_win_x = m_window.org_x;
m_rw_win_y++;
if (m_rw_win_y >= (m_window.height + m_window.org_y))
m_command = NOP;
}
}
}
break;
case RDP:
if (m_rd_ptr == 0)
m_io_word = m_cursor_x;
else if (m_rd_ptr == 2)
m_io_word = m_cursor_y;
break;
case RDSP:
if (m_rd_ptr == 0)
m_io_word = m_sprite_x;
else if (m_rd_ptr == 2)
m_io_word = m_sprite_y;
break;
case RDWINPARM:
switch (m_rd_ptr)
{
case 0:
m_io_word = m_window.org_x;
break;
case 2:
m_io_word = m_window.org_y;
break;
case 4:
m_io_word = m_window.width;
break;
case 6:
m_io_word = m_window.height;
break;
default:
break;
}
break;
case ID:
/*
* 'diagb' ROM accepts either of these ID values
* 0x3003, 0x4004, 0x5005, 0x6006
*/
m_io_word = 0x4004;
break;
}
data = uint8_t(m_io_word >> 8);
} else
{
data = m_io_word & 0xff;
}
m_rd_ptr++;
}
DBG_LOG(1,"HPGPU", ("R @ %d == %02x\n", offset, data));
return data;
}
//-------------------------------------------------
// write - register write
//-------------------------------------------------
WRITE8_MEMBER( hp1ll3_device::write )
{
DBG_LOG(1,"HPGPU", ("W @ %d <- %02x\n", offset, data));
if (offset == 0)
{
command(data);
}
else
{
if (!(m_wr_ptr & 1))
{
m_io_word = uint16_t(data) << 8;
}
else
{
m_io_word |= data;
switch (m_command)
{
case CONF:
m_conf[m_wr_ptr >> 1] = m_io_word;
DBG_LOG(1,"HPGPU",("CONF data word %d received: %04X\n", m_wr_ptr >> 1, m_io_word));
if ((m_wr_ptr >> 1) == 10) {
apply_conf();
m_wr_ptr = -1;
m_command = NOP;
}
break;
case WRMEM:
wr_video(m_memory_ptr++, m_io_word);
break;
case WRWIN:
{
uint16_t rop_masks[4];
get_rop_masks(m_rr, rop_masks);
uint16_t addr = get_pix_addr(m_rw_win_x, m_rw_win_y);
uint16_t glob_mask = ~0;
unsigned bit = m_rw_win_x % WS;
int width = m_window.width + m_window.org_x - m_rw_win_x;
if (width <= 0)
m_command = NOP;
else
{
unsigned w = std::min(WS, unsigned(width));
glob_mask >>= bit;
if ((bit + w) < WS)
glob_mask &= ~0 << (WS - (bit + w));
rmw_rop(addr, m_io_word >> bit, glob_mask, rop_masks);
DBG_LOG(3, 0, ("WRWIN (%u,%u) %d %04x %04x\n", m_rw_win_x, m_rw_win_y, width, m_io_word >> bit, glob_mask));
if ((bit + w) > WS)
{
unsigned pad = WS - bit;
glob_mask = ~0 << (2 * WS - bit - w);
rmw_rop(addr + 1, uint16_t(m_io_word << pad), glob_mask, rop_masks);
DBG_LOG(3, 0, ("WRWIN %u %04x %04x\n", pad, m_io_word << pad, glob_mask));
}
m_rw_win_x += w;
if (m_rw_win_x >= (m_window.width + m_window.org_x))
{
m_rw_win_x = m_window.org_x;
m_rw_win_y++;
if (m_rw_win_y >= (m_window.height + m_window.org_y))
m_command = NOP;
}
}
}
break;
default:
if (m_wr_ptr <= 4)
m_input[m_wr_ptr / 2] = m_io_word;
DBG_LOG(2,"HPGPU",("wrote %02x at %d, input buffer is %04X %04X\n", data, m_wr_ptr, m_input[0], m_input[1]));
}
}
m_wr_ptr++;
}
}
void hp1ll3_device::command(int command)
{
switch (command)
{
// type 0 commands -- no data
case NOP:
DBG_LOG(2,"HPGPU",("command: NOP [%d, 0x%x]\n", command, command));
switch (m_command)
{
case RDMEM:
DBG_LOG(1,"HPGPU",("RDMEM of %d words at %04X complete\n", m_memory_ptr - m_input[0], m_input[0]));
break;
case WRMEM:
DBG_LOG(1,"HPGPU",("WRMEM of %d words to %04X complete\n", m_memory_ptr - m_input[0], m_input[0]));
break;
}
break;
case DISVID:
DBG_LOG(2,"HPGPU",("command: DISVID [%d, 0x%x]\n", command, command));
m_enable_video = false;
break;
case ENVID:
DBG_LOG(2,"HPGPU",("command: ENVID [%d, 0x%x]\n", command, command));
DBG_LOG(1,"HPGPU",("enable video; SAD %04x FAD %04x DAD %04x ORG %04x UDL %04x RR %04x\n",
m_sad, m_fad, m_dad, m_org, m_udl, m_rr));
m_enable_video = true;
break;
case DISSP:
DBG_LOG(2,"HPGPU",("command: DISSP [%d, 0x%x]\n", command, command));
disable_sprite();
break;
case ENSP:
DBG_LOG(2,"HPGPU",("command: ENSP [%d, 0x%x]\n", command, command));
draw_sprite();
m_sprite_pattern = m_input[0];
m_enable_sprite = true;
draw_sprite();
DBG_LOG(1,"HPGPU",("enable sprite; cursor %d,%d sprite %d,%d\n", m_cursor_x, m_cursor_y, m_sprite_x, m_sprite_y));
break;
case DISCURS:
DBG_LOG(2,"HPGPU",("command: DISCURS [%d, 0x%x]\n", command, command));
disable_cursor();
break;
// type 1 commands -- 1 word of data expected in the buffer
// start of screen memory
case WRSAD:
DBG_LOG(2,"HPGPU",("command: WRSAD [%d, 0x%x] (0x%04x)\n", command, command, m_input[0]));
m_sad = m_input[0];
break;
// start of font memory
case WRFAD:
DBG_LOG(2,"HPGPU",("command: WRFAD [%d, 0x%x] (0x%04x)\n", command, command, m_input[0]));
m_fad = m_input[0];
break;
// ?? used by diagnostic ROM
case 6:
DBG_LOG(1,"HPGPU",("command: 6\n"));
break;
// start of data area
case WRDAD:
DBG_LOG(2,"HPGPU",("command: WRDAD [%d, 0x%x] (0x%04x)\n", command, command, m_input[0]));
m_dad = m_input[0];
break;
// ??
case WRORG:
DBG_LOG(2,"HPGPU",("command: WRORG [%d, 0x%x] (0x%04x)\n", command, command, m_input[0]));
m_org = m_input[0];
break;
// set replacement rule (raster op)
case WRRR:
DBG_LOG(2,"HPGPU",("command: WRRR [%d, 0x%x] (0x%04x)\n", command, command, m_input[0]));
m_rr = m_input[0];
break;
// set user-defined line pattern
case WRUDL:
DBG_LOG(2,"HPGPU",("command: WRUDL [%d, 0x%x] (0x%04x)\n", command, command, m_input[0]));
m_udl = m_input[0];
break;
// area fill
case FILL:
DBG_LOG(2,"HPGPU",("command: FILL [%d, 0x%x] (0x%04x) from (%d,%d) size (%d,%d) rop 0x%x\n",
command, command, m_input[0],
m_window.org_x, m_window.org_y, m_window.width, m_window.height, m_rr));
draw_cursor_sprite();
fill(get_window(), m_input[0]);
draw_cursor_sprite();
break;
case LABEL:
{
DBG_LOG(2,"HPGPU",("command: LABEL [%d, 0x%x] (0x%04x, '%c') at %d,%d\n", command, command, m_input[0],
(m_input[0]<32||m_input[0]>127) ? ' ' : m_input[0], m_cursor_x, m_cursor_y));
int const c = m_input[0] & 255;
int const w = (c & 1) ?
(rd_video(m_fad + 2 + (c>>1)) & 255) :
(rd_video(m_fad + 2 + (c>>1)) >> 8);
label(c, w);
}
break;
// Write window
case WRWIN:
// Read window
case RDWIN:
DBG_LOG(2,"HPGPU",("command: %s [%d, 0x%x] offset=%u size(%d,%d)\n",
command == RDWIN ? "RDWIN":"WRWIN", command, command, m_input[0], m_window.width, m_window.height));
// m_input[0] is offset (to be implemented)
m_rw_win_x = m_window.org_x;
m_rw_win_y = m_window.org_y;
disable_cursor();
disable_sprite();
break;
// type 2 commands -- 2 words of data expected in the buffer
case DRAWPX:
{
DBG_LOG(2,"HPGPU",("command: DRAWPX [%d, 0x%x] (%d, %d)\n", command, command, m_input[0], m_input[1]));
uint16_t rop_masks[4];
get_rop_masks(m_rr, rop_masks);
point(m_input[0], m_input[1], true, rop_masks);
}
break;
// set window size
case WRWINSIZ:
DBG_LOG(2,"HPGPU",("command: WRWINSIZ [%d, 0x%x] (%d, %d)\n", command, command, m_input[0], m_input[1]));
m_window.width = m_input[0];
m_window.height = m_input[1];
break;
// set window origin
case WRWINORG:
DBG_LOG(2,"HPGPU",("command: WRWINORG [%d, 0x%x] (%d, %d)\n", command, command, m_input[0], m_input[1]));
m_window.org_x = m_input[0];
m_window.org_y = m_input[1];
break;
// Copy
case COPY:
{
DBG_LOG(2,"HPGPU",("command: COPY [%d, 0x%x] (%d, %d)\n", command, command, m_input[0], m_input[1]));
draw_cursor_sprite();
unsigned rounded_width = m_conf[CONF_WPL] * WS;
Rectangle dst_rect{{ m_input[0], m_input[1] }, { m_window.width, m_window.height }};
// COPY apparently doesn't clip anything
bitblt(m_org, rounded_width, 0xffff, Point{ m_window.org_x, m_window.org_y },
Rectangle{{ 0, 0 }, { uint16_t(rounded_width), 0xffff }}, dst_rect, m_rr);
draw_cursor_sprite();
}
break;
// move pointer absolute
case MOVEP:
DBG_LOG(2,"HPGPU",("command: MOVEP [%d, 0x%x] (%d, %d)\n", command, command, m_input[0], m_input[1]));
set_pen_pos(Point{ m_input[0], m_input[1] });
m_saved_x = m_cursor_x;
break;
// move pointer incremental
case IMOVEP:
DBG_LOG(2,"HPGPU",("command: IMOVEP [%d, 0x%x] (%d, %d)\n", command, command, m_input[0], m_input[1]));
set_pen_pos(Point{ uint16_t(m_cursor_x + m_input[0]), uint16_t(m_cursor_y + m_input[1]) });
m_saved_x = m_cursor_x;
break;
// Scroll UP
case SCROLUP:
{
DBG_LOG(2,"HPGPU",("command: SCROLUP [%d, 0x%x] (%d, %d)\n", command, command, m_input[0], m_input[1]));
draw_cursor_sprite();
Point src_p{ m_window.org_x, uint16_t(m_window.org_y + m_input[1]) };
Rectangle dst_rect = get_window();
dst_rect.size.y -= m_input[1];
unsigned rounded_width = m_conf[CONF_WPL] * WS;
bitblt(m_org, rounded_width, m_vert_pix_total, src_p, get_window(), dst_rect, m_rr);
dst_rect.origin.y += dst_rect.size.y;
dst_rect.size.y = m_input[1];
fill(dst_rect, m_input[0]);
draw_cursor_sprite();
}
break;
// Scroll DOWN
case SCROLDN:
{
DBG_LOG(2,"HPGPU",("command: SCROLDN [%d, 0x%x] (%d, %d)\n", command, command, m_input[0], m_input[1]));
draw_cursor_sprite();
Point src_p{ m_window.org_x, m_window.org_y };
Rectangle dst_rect = get_window();
dst_rect.origin.y += m_input[1];
dst_rect.size.y -= m_input[1];
unsigned rounded_width = m_conf[CONF_WPL] * WS;
bitblt(m_org, rounded_width, m_vert_pix_total, src_p, get_window(), dst_rect, m_rr);
dst_rect.origin.y = m_window.org_y;
dst_rect.size.y = m_input[1];
fill(dst_rect, m_input[0]);
draw_cursor_sprite();
}
break;
case ENCURS:
DBG_LOG(2,"HPGPU",("command: ENCURS [%d, 0x%x]\n", command, command));
draw_cursor();
m_cursor_pattern = m_input[0];
m_cursor_offset = m_input[1];
m_enable_cursor = true;
draw_cursor();
DBG_LOG(1,"HPGPU",("enable cursor; cursor %d,%d sprite %d,%d\n", m_cursor_x, m_cursor_y, m_sprite_x, m_sprite_y));
break;
// carriage return, line feed
case CRLFx:
{
DBG_LOG(2,"HPGPU",("command: CRLF [%d, 0x%x]\n", command, command));
uint16_t font_data;
uint16_t font_height;
get_font(font_data, font_height);
set_pen_pos(Point{ m_saved_x, uint16_t(m_cursor_y + font_height) });
}
break;
// move sprite absolute
case MOVESP:
DBG_LOG(2,"HPGPU",("command: MOVESP [%d, 0x%x] (%d, %d)\n", command, command, m_input[0], m_input[1]));
set_sprite_pos(Point{ m_input[0], m_input[1] });
break;
// draw to ...
case DRAWP:
DBG_LOG(2,"HPGPU",("command: DRAWP [%d, 0x%x] (%d, %d) to (%d, %d)\n",
command, command, m_cursor_x, m_cursor_y, m_input[0], m_input[1]));
line(m_cursor_x, m_cursor_y, m_input[0], m_input[1]);
set_pen_pos(Point{ m_input[0], m_input[1] });
break;
// type 3 command -- CONF -- accept configuration parameters (11 words)
case CONF:
break;
// type 4 commands -- like type 1 plus data is read or written after command, terminated by NOP
case RDMEM:
case WRMEM:
DBG_LOG(2,"HPGPU",("command: %s [%d, 0x%x] (0x%04x)\n",
command == RDMEM?"RDMEM":"WRMEM", command, command, m_input[0]));
m_memory_ptr = m_input[0]; // memory is word-addressable
disable_cursor();
disable_sprite();
break;
// type 3 read commands
case RDP:
DBG_LOG(2,"HPGPU",("command: RDP [%d, 0x%x]\n", command, command));
break;
case RDSP:
DBG_LOG(2,"HPGPU",("command: RDSP [%d, 0x%x]\n", command, command));
break;
case RDWINPARM:
DBG_LOG(2,"HPGPU",("command: RDWINPARM [%d, 0x%x]\n", command, command));
break;
case ID:
DBG_LOG(2,"HPGPU",("command: ID [%d, 0x%x]\n", command, command));
break;
default:
DBG_LOG(1,"HPGPU",("command: UNKNOWN [%d, 0x%x]\n", command, command));
break;
}
m_rd_ptr = 0;
m_wr_ptr = 0;
m_command = command;
}
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