// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** atarirle.c RLE sprite handling for early-to-mid 90's Atari raster games. **************************************************************************** Description: Beginning with Hydra, and continuing through to Primal Rage, Atari used RLE-compressed sprites. These sprites were decoded, colored, and scaled on the fly using an AMD 29C101 ALU unit. The instructions for the ALU were read from 3 512-byte PROMs and fed into the instruction input. See the bottom of the source for more details on the operation of these components. ***************************************************************************/ #include "emu.h" #include "atarirle.h" #include "screen.h" //************************************************************************** // CONSTANTS //************************************************************************** DEFINE_DEVICE_TYPE(ATARI_RLE_OBJECTS, atari_rle_objects_device, "atari_rle", "Atari RLE Motion Objects") enum { atarirle_hilite_index = -1 }; //************************************************************************** // INLINE FUNCTIONS //************************************************************************** //------------------------------------------------- // round_to_powerof2: Rounds a number up to the // nearest power of 2. Even powers of 2 are // rounded up to the next greatest power // (e.g., 4 returns 8). //------------------------------------------------- inline int atari_rle_objects_device::round_to_powerof2(int value) { int log = 0; if (value == 0) return 1; while ((value >>= 1) != 0) log++; return 1 << (log + 1); } //************************************************************************** // CORE DEVICE IMPLEMENTATION //************************************************************************** //------------------------------------------------- // atari_rle_objects_device: Constructor //------------------------------------------------- atari_rle_objects_device::atari_rle_objects_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, ATARI_RLE_OBJECTS, tag, owner, clock), device_video_interface(mconfig, *this), m_rombase(*this, DEVICE_SELF) { } //------------------------------------------------- // control_write: Write handler for MO control // bits. //------------------------------------------------- WRITE8_MEMBER(atari_rle_objects_device::control_write) { //logerror("atarirle_control_w(%d)\n", bits); // do nothing if nothing changed int oldbits = m_control_bits; if (oldbits == data) return; // force a partial update first int scanline = screen().vpos(); screen().update_partial(scanline); // if the erase flag was set, erase the front map if ((oldbits & ATARIRLE_CONTROL_ERASE) != 0) { // compute the top and bottom of the rect rectangle cliprect = m_cliprect; if (m_partial_scanline + 1 > cliprect.min_y) cliprect.min_y = m_partial_scanline + 1; if (scanline < cliprect.max_y) cliprect.max_y = scanline; //logerror(" partial erase %d-%d (frame %d)\n", cliprect.min_y, cliprect.max_y, (oldbits & ATARIRLE_CONTROL_FRAME) >> 2); // erase the bitmap m_vram[0][(oldbits & ATARIRLE_CONTROL_FRAME) >> 2].fill(0, cliprect); if (m_vrammask.mask() != 0) m_vram[1][(oldbits & ATARIRLE_CONTROL_FRAME) >> 2].fill(0, cliprect); } // update the bits m_control_bits = data; // if mogo is set, do a render on the rising edge if ((oldbits & ATARIRLE_CONTROL_MOGO) == 0 && (data & ATARIRLE_CONTROL_MOGO) != 0) { if (m_command == ATARIRLE_COMMAND_DRAW) sort_and_render(); else if (m_command == ATARIRLE_COMMAND_CHECKSUM) compute_checksum(); } // remember where we left off m_partial_scanline = scanline; } //------------------------------------------------- // command_write: Write handler for MO command // bits. //------------------------------------------------- WRITE8_MEMBER(atari_rle_objects_device::command_write) { m_command = data; } //------------------------------------------------- // vblank_callback: VBLANK callback. //------------------------------------------------- void atari_rle_objects_device::vblank_callback(screen_device &screen, bool state) { // on the rising edge, if the erase flag is set, erase to the end of the screen if (state) { if (m_control_bits & ATARIRLE_CONTROL_ERASE) { // compute top only; bottom is equal to visible_area rectangle cliprect = m_cliprect; if (m_partial_scanline + 1 > cliprect.min_y) cliprect.min_y = m_partial_scanline + 1; //logerror(" partial erase %d-%d (frame %d)\n", cliprect.min_y, cliprect.max_y, (m_control_bits & ATARIRLE_CONTROL_FRAME) >> 2); // erase the bitmap m_vram[0][(m_control_bits & ATARIRLE_CONTROL_FRAME) >> 2].fill(0, cliprect); if (m_vrammask.mask() != 0) m_vram[1][(m_control_bits & ATARIRLE_CONTROL_FRAME) >> 2].fill(0, cliprect); } // reset the partial scanline to -1 so we can detect full updates m_partial_scanline = -1; } } //------------------------------------------------- // device_start: Configures the motion objects // using the input description. Allocates all // memory necessary and generates the attribute // lookup table. //------------------------------------------------- void atari_rle_objects_device::device_start() { // resolve our memory memory_share *share = owner()->memshare(tag()); if (share == nullptr) throw emu_fatalerror("Unable to find memory share '%s' needed for Atari RLE device", tag()); m_ram.set(*share, 2); // register a VBLANK callback screen().register_vblank_callback(vblank_state_delegate(&atari_rle_objects_device::vblank_callback, this)); // build and allocate the generic tables build_rle_tables(); // determine the masks first m_codemask.set(m_code_entry); m_colormask.set(m_color_entry); m_xposmask.set(m_xpos_entry); m_yposmask.set(m_ypos_entry); m_scalemask.set(m_scale_entry); m_hflipmask.set(m_hflip_entry); m_ordermask.set(m_order_entry); m_prioritymask.set(m_priority_entry); m_vrammask.set(m_vram_entry); // copy in the basic data m_bitmapwidth = round_to_powerof2(m_xposmask.mask()); m_bitmapheight = round_to_powerof2(m_yposmask.mask()); m_bitmapxmask = m_bitmapwidth - 1; m_bitmapymask = m_bitmapheight - 1; // set up the graphics ROM m_objectcount = count_objects(); // set up a cliprect m_cliprect = screen().visible_area(); if (m_rightclip != 0) { m_cliprect.min_x = m_leftclip; m_cliprect.max_x = m_rightclip; } // compute the checksums memset(m_checksums, 0, sizeof(m_checksums)); for (int sumchunk = 0; sumchunk < m_rombase.bytes() / 0x20000; sumchunk++) { const uint16_t *csbase = &m_rombase[0x10000 * sumchunk]; int cursum = 0; for (int word = 0; word < 0x10000; word++) cursum += *csbase++; m_checksums[sumchunk] = cursum; } // allocate the object info and scan the objects m_info.resize(m_objectcount); for (int objnum = 0; objnum < m_objectcount; objnum++) prescan_rle(objnum); // register the bitmaps with the target screen screen().register_screen_bitmap(m_vram[0][0]); screen().register_screen_bitmap(m_vram[0][1]); m_vram[0][0].fill(0); m_vram[0][1].fill(0); // allocate alternate bitmaps if needed if (m_vrammask.mask() != 0) { screen().register_screen_bitmap(m_vram[1][0]); screen().register_screen_bitmap(m_vram[1][1]); m_vram[1][0].fill(0); m_vram[1][1].fill(0); } // register for save states save_item(NAME(m_vram[0][0])); save_item(NAME(m_vram[0][1])); if (m_vrammask.mask() != 0) { save_item(NAME(m_vram[1][0])); save_item(NAME(m_vram[1][1])); } save_item(NAME(m_partial_scanline)); save_item(NAME(m_control_bits)); save_item(NAME(m_command)); } //------------------------------------------------- // device_reset: Reset the state of the device. //------------------------------------------------- void atari_rle_objects_device::device_reset() { m_partial_scanline = -1; } //------------------------------------------------- // build_rle_tables: Builds internal table for // RLE mapping. //------------------------------------------------- void atari_rle_objects_device::build_rle_tables() { // assign the tables m_rle_table[0] = &m_rle_table_data[0x000]; m_rle_table[1] = &m_rle_table_data[0x100]; m_rle_table[2] = m_rle_table[3] = &m_rle_table_data[0x200]; m_rle_table[4] = m_rle_table[6] = &m_rle_table_data[0x300]; m_rle_table[5] = m_rle_table[7] = &m_rle_table_data[0x400]; // set the bpps m_rle_bpp[0] = 4; m_rle_bpp[1] = m_rle_bpp[2] = m_rle_bpp[3] = 5; m_rle_bpp[4] = m_rle_bpp[5] = m_rle_bpp[6] = m_rle_bpp[7] = 6; // build the 4bpp table for (int i = 0; i < 256; i++) m_rle_table[0][i] = (((i & 0xf0) + 0x10) << 4) | (i & 0x0f); // build the 5bpp table for (int i = 0; i < 256; i++) m_rle_table[2][i] = (((i & 0xe0) + 0x20) << 3) | (i & 0x1f); // build the special 5bpp table for (int i = 0; i < 256; i++) { if ((i & 0x0f) == 0) m_rle_table[1][i] = (((i & 0xf0) + 0x10) << 4) | (i & 0x0f); else m_rle_table[1][i] = (((i & 0xe0) + 0x20) << 3) | (i & 0x1f); } // build the 6bpp table for (int i = 0; i < 256; i++) m_rle_table[5][i] = (((i & 0xc0) + 0x40) << 2) | (i & 0x3f); // build the special 6bpp table for (int i = 0; i < 256; i++) { if ((i & 0x0f) == 0) m_rle_table[4][i] = (((i & 0xf0) + 0x10) << 4) | (i & 0x0f); else m_rle_table[4][i] = (((i & 0xc0) + 0x40) << 2) | (i & 0x3f); } } //------------------------------------------------- // count_objects: Determines the number of objects in the // motion object ROM. //------------------------------------------------- int atari_rle_objects_device::count_objects() { // first determine the lowest address of all objects int lowest_address = m_rombase.length(); for (int objoffset = 0; objoffset < lowest_address; objoffset += 4) { int offset = ((m_rombase[objoffset + 2] & 0xff) << 16) | m_rombase[objoffset + 3]; //logerror("count_objects: objoffset=%d offset=%08X\n", objoffset, offset); if (offset > objoffset && offset < lowest_address) lowest_address = offset; } // that determines how many objects return lowest_address / 4; } //------------------------------------------------- // prescan_rle: Prescans an RLE object, computing the // width, height, and other goodies. //------------------------------------------------- void atari_rle_objects_device::prescan_rle(int which) { object_info &info = m_info[which]; // look up the offset uint16_t *base = (uint16_t *)&m_rombase[which * 4]; const uint16_t *end = &m_rombase[0] + m_rombase.length(); info.xoffs = (int16_t)base[0]; info.yoffs = (int16_t)base[1]; // determine the depth and table int flags = base[2]; info.bpp = m_rle_bpp[(flags >> 8) & 7]; const uint16_t *table = info.table = m_rle_table[(flags >> 8) & 7]; // determine the starting offset int offset = ((base[2] & 0xff) << 16) | base[3]; info.data = base = (uint16_t *)&m_rombase[offset]; // make sure it's valid if (offset < which * 4 || offset >= m_rombase.length()) { info.data = nullptr; return; } // first pre-scan to determine the width and height int width = 0; int height; for (height = 0; height < 1024 && base < end; height++) { int tempwidth = 0; int entry_count = *base++; // if the high bit is set, assume we're inverted if (entry_count & 0x8000) { entry_count ^= 0xffff; // also change the ROM data so we don't have to do this again at runtime base[-1] ^= 0xffff; } // we're done when we hit 0 if (entry_count == 0) break; // track the width while (entry_count-- && base < end) { int word = *base++; int count/*, value*/; // decode the low byte first count = table[word & 0xff]; //value = count & 0xff; tempwidth += count >> 8; // decode the upper byte second count = table[word >> 8]; //value = count & 0xff; tempwidth += count >> 8; } // only remember the max if (tempwidth > width) width = tempwidth; } // fill in the data info.width = width; info.height = height; } //------------------------------------------------- // compute_checksum: Compute the checksum values // on the ROMs. //------------------------------------------------- void atari_rle_objects_device::compute_checksum() { // number of checksums is in the first word int reqsums = m_ram.read(0) + 1; if (reqsums > 256) reqsums = 256; // stuff them back for (int i = 0; i < reqsums; i++) m_ram.write(i, m_checksums[i]); } //------------------------------------------------- // sort_and_render: Render all motion objects in // order. //------------------------------------------------- void atari_rle_objects_device::sort_and_render() { // struct for sorting struct sort_entry_t { sort_entry_t * next; int entry; }; // sort the motion objects into their proper priorities sort_entry_t *list_head[256] = { nullptr }; sort_entry_t sort_entry[256]; for (int objnum = 0; objnum < 256; objnum++) { int order = m_ordermask.extract(m_ram, objnum * 8); sort_entry[objnum].entry = objnum * 8; sort_entry[objnum].next = list_head[order]; list_head[order] = &sort_entry[objnum]; } // now loop back and process int bitmap_index = (~m_control_bits & ATARIRLE_CONTROL_FRAME) >> 2; int count = 0; int hilite = -1; for (int order = 1; order < 256; order++) for (sort_entry_t *current = list_head[order]; current != nullptr; current = current->next) { // extract scale and code int scale = m_scalemask.extract(m_ram, current->entry); int code = m_codemask.extract(m_ram, current->entry); // make sure they are in range if (scale > 0 && code < m_objectcount) { int hflip = m_hflipmask.extract(m_ram, current->entry); int color = m_colormask.extract(m_ram, current->entry); int priority = m_prioritymask.extract(m_ram, current->entry); int x = m_xposmask.extract(m_ram, current->entry); int y = m_yposmask.extract(m_ram, current->entry); int which = m_vrammask.extract(m_ram, current->entry); if (count++ == atarirle_hilite_index) hilite = current->entry; if (x & ((m_xposmask.mask() + 1) >> 1)) x = (int16_t)(x | ~m_xposmask.mask()); if (y & ((m_yposmask.mask() + 1) >> 1)) y = (int16_t)(y | ~m_yposmask.mask()); x += m_cliprect.min_x; // merge priority and color color = (color << 4) | (priority << ATARIRLE_PRIORITY_SHIFT); // render to one or both bitmaps bitmap_ind16 &bitmap = m_vram[which][bitmap_index]; draw_rle(bitmap, m_cliprect, code, color, hflip, 0, x, y, scale, scale); } } if (hilite != -1) hilite_object(m_vram[0][bitmap_index], hilite); } //------------------------------------------------- // draw_rle: Render a single RLE-compressed motion // object. //------------------------------------------------- void atari_rle_objects_device::draw_rle(bitmap_ind16 &bitmap, const rectangle &clip, int code, int color, int hflip, int vflip, int x, int y, int xscale, int yscale) { // bail on a nullptr object const object_info &info = m_info[code]; if (info.data == nullptr) return; // int scaled_xoffs = (xscale * info.xoffs) >> 12; int scaled_yoffs = (yscale * info.yoffs) >> 12; // we're hflipped, account for it if (hflip) scaled_xoffs = ((xscale * info.width) >> 12) - scaled_xoffs; //if (clip.min_y == screen().visible_area().min_y) //logerror(" Sprite: c=%04X l=%04X h=%d X=%4d (o=%4d w=%3d) Y=%4d (o=%4d h=%d) s=%04X\n", // code, color, hflip, // x, -scaled_xoffs, (xscale * info.width) >> 12, // y, -scaled_yoffs, (yscale * info.height) >> 12, xscale); // adjust for the x and y offsets x -= scaled_xoffs; y -= scaled_yoffs; // draw it with appropriate flipping uint32_t palettebase = m_palettebase + color; if (!hflip) draw_rle_zoom(bitmap, clip, info, palettebase, x, y, xscale << 4, yscale << 4); else draw_rle_zoom_hflip(bitmap, clip, info, palettebase, x, y, xscale << 4, yscale << 4); } //------------------------------------------------- // draw_rle_zoom: Draw an RLE-compressed object to // a 16-bit bitmap. //------------------------------------------------- void atari_rle_objects_device::draw_rle_zoom(bitmap_ind16 &bitmap, const rectangle &clip, const object_info &info, uint32_t palette, int sx, int sy, int scalex, int scaley) { // determine scaled size; make sure we didn't end up with 0 int scaled_width = (scalex * info.width + 0x7fff) >> 16; int scaled_height = (scaley * info.height + 0x7fff) >> 16; if (scaled_width == 0) scaled_width = 1; if (scaled_height == 0) scaled_height = 1; // compute the remaining parameters int dx = (info.width << 16) / scaled_width; int dy = (info.height << 16) / scaled_height; int ex = sx + scaled_width - 1; int ey = sy + scaled_height - 1; int sourcey = dy / 2; // left edge clip int pixels_to_skip = 0; bool xclipped = false; if (sx < clip.min_x) pixels_to_skip = clip.min_x - sx, xclipped = true; if (sx > clip.max_x) return; // right edge clip if (ex > clip.max_x) ex = clip.max_x, xclipped = true; else if (ex < clip.min_x) return; // top edge clip if (sy < clip.min_y) { sourcey += (clip.min_y - sy) * dy; sy = clip.min_y; } else if (sy > clip.max_y) return; // bottom edge clip if (ey > clip.max_y) ey = clip.max_y; else if (ey < clip.min_y) return; // loop top to bottom const uint16_t *row_start = info.data; const uint16_t *table = info.table; int current_row = 0; for (int y = sy; y <= ey; y++, sourcey += dy) { uint16_t *dest = &bitmap.pix16(y, sx); int sourcex = dx / 2, rle_end = 0; // loop until we hit the row we're on for ( ; current_row != (sourcey >> 16); current_row++) row_start += 1 + *row_start; // grab our starting parameters from this row const uint16_t *base = row_start; int entry_count = *base++; // non-clipped case if (!xclipped) { // decode the pixels for (int entry = 0; entry < entry_count; entry++) { // decode the low byte first int word = *base++; int count = table[word & 0xff]; int value = count & 0xff; rle_end += (count & 0xff00) << 8; // store copies of the value until we pass the end of this chunk if (value) { value += palette; while (sourcex < rle_end) *dest++ = value, sourcex += dx; } else { while (sourcex < rle_end) dest++, sourcex += dx; } // decode the upper byte second count = table[word >> 8]; value = count & 0xff; rle_end += (count & 0xff00) << 8; // store copies of the value until we pass the end of this chunk if (value) { value += palette; while (sourcex < rle_end) *dest++ = value, sourcex += dx; } else { while (sourcex < rle_end) dest++, sourcex += dx; } } } // clipped case else { const uint16_t *end = &bitmap.pix16(y, ex); int to_be_skipped = pixels_to_skip; // decode the pixels for (int entry = 0; entry < entry_count && dest <= end; entry++) { // decode the low byte first int word = *base++; int count = table[word & 0xff]; int value = count & 0xff; rle_end += (count & 0xff00) << 8; // store copies of the value until we pass the end of this chunk if (to_be_skipped) { while (to_be_skipped && sourcex < rle_end) dest++, sourcex += dx, to_be_skipped--; if (to_be_skipped) goto next3; } if (value) { value += palette; while (sourcex < rle_end && dest <= end) *dest++ = value, sourcex += dx; } else { while (sourcex < rle_end) dest++, sourcex += dx; } next3: // decode the upper byte second count = table[word >> 8]; value = count & 0xff; rle_end += (count & 0xff00) << 8; // store copies of the value until we pass the end of this chunk if (to_be_skipped) { while (to_be_skipped && sourcex < rle_end) dest++, sourcex += dx, to_be_skipped--; if (to_be_skipped) goto next4; } if (value) { value += palette; while (sourcex < rle_end && dest <= end) *dest++ = value, sourcex += dx; } else { while (sourcex < rle_end) dest++, sourcex += dx; } next4: ; } } } } //------------------------------------------------- // draw_rle_zoom_hflip: Draw an RLE-compressed // object to a 16-bit bitmap with horizontal // flip. //------------------------------------------------- void atari_rle_objects_device::draw_rle_zoom_hflip(bitmap_ind16 &bitmap, const rectangle &clip, const object_info &info, uint32_t palette, int sx, int sy, int scalex, int scaley) { // determine scaled size; make sure we didn't end up with 0 int scaled_width = (scalex * info.width + 0x7fff) >> 16; int scaled_height = (scaley * info.height + 0x7fff) >> 16; if (scaled_width == 0) scaled_width = 1; if (scaled_height == 0) scaled_height = 1; // compute the remaining parameters int dx = (info.width << 16) / scaled_width; int dy = (info.height << 16) / scaled_height; int ex = sx + scaled_width - 1; int ey = sy + scaled_height - 1; int sourcey = dy / 2; // left edge clip int pixels_to_skip = 0; bool xclipped = false; if (sx < clip.min_x) sx = clip.min_x, xclipped = true; if (sx > clip.max_x) return; // right edge clip if (ex > clip.max_x) pixels_to_skip = ex - clip.max_x, xclipped = true; else if (ex < clip.min_x) return; // top edge clip if (sy < clip.min_y) { sourcey += (clip.min_y - sy) * dy; sy = clip.min_y; } else if (sy > clip.max_y) return; // bottom edge clip if (ey > clip.max_y) ey = clip.max_y; else if (ey < clip.min_y) return; // loop top to bottom const uint16_t *row_start = info.data; const uint16_t *table = info.table; int current_row = 0; for (int y = sy; y <= ey; y++, sourcey += dy) { uint16_t *dest = &bitmap.pix16(y, ex); int sourcex = dx / 2, rle_end = 0; // loop until we hit the row we're on for ( ; current_row != (sourcey >> 16); current_row++) row_start += 1 + *row_start; // grab our starting parameters from this row const uint16_t *base = row_start; int entry_count = *base++; // non-clipped case if (!xclipped) { // decode the pixels for (int entry = 0; entry < entry_count; entry++) { // decode the low byte first int word = *base++; int count = table[word & 0xff]; int value = count & 0xff; rle_end += (count & 0xff00) << 8; // store copies of the value until we pass the end of this chunk if (value) { value += palette; while (sourcex < rle_end) *dest-- = value, sourcex += dx; } else { while (sourcex < rle_end) dest--, sourcex += dx; } // decode the upper byte second count = table[word >> 8]; value = count & 0xff; rle_end += (count & 0xff00) << 8; // store copies of the value until we pass the end of this chunk if (value) { value += palette; while (sourcex < rle_end) *dest-- = value, sourcex += dx; } else { while (sourcex < rle_end) dest--, sourcex += dx; } } } // clipped case else { const uint16_t *start = &bitmap.pix16(y, sx); int to_be_skipped = pixels_to_skip; // decode the pixels for (int entry = 0; entry < entry_count && dest >= start; entry++) { // decode the low byte first int word = *base++; int count = table[word & 0xff]; int value = count & 0xff; rle_end += (count & 0xff00) << 8; // store copies of the value until we pass the end of this chunk if (to_be_skipped) { while (to_be_skipped && sourcex < rle_end) dest--, sourcex += dx, to_be_skipped--; if (to_be_skipped) goto next3; } if (value) { value += palette; while (sourcex < rle_end && dest >= start) *dest-- = value, sourcex += dx; } else { while (sourcex < rle_end) dest--, sourcex += dx; } next3: // decode the upper byte second count = table[word >> 8]; value = count & 0xff; rle_end += (count & 0xff00) << 8; // store copies of the value until we pass the end of this chunk if (to_be_skipped) { while (to_be_skipped && sourcex < rle_end) dest--, sourcex += dx, to_be_skipped--; if (to_be_skipped) goto next4; } if (value) { value += palette; while (sourcex < rle_end && dest >= start) *dest-- = value, sourcex += dx; } else { while (sourcex < rle_end) dest--, sourcex += dx; } next4: ; } } } } //------------------------------------------------- // hilite_object: Hilight an object by drawing a // flashing box around it //------------------------------------------------- void atari_rle_objects_device::hilite_object(bitmap_ind16 &bitmap, int hilite) { // extract scale and code int scale = m_scalemask.extract(m_ram, hilite); int code = m_codemask.extract(m_ram, hilite); // make sure they are in range if (scale > 0 && code < m_objectcount) { int hflip = m_hflipmask.extract(m_ram, hilite); int color = m_colormask.extract(m_ram, hilite); int priority = m_prioritymask.extract(m_ram, hilite); int x = m_xposmask.extract(m_ram, hilite); int y = m_yposmask.extract(m_ram, hilite); if (x & ((m_xposmask.mask() + 1) >> 1)) x = (int16_t)(x | ~m_xposmask.mask()); if (y & ((m_yposmask.mask() + 1) >> 1)) y = (int16_t)(y | ~m_yposmask.mask()); x += m_cliprect.min_x; // merge priority and color color = (color << 4) | (priority << ATARIRLE_PRIORITY_SHIFT); const object_info &info = m_info[code]; int scaled_xoffs = (scale * info.xoffs) >> 12; int scaled_yoffs = (scale * info.yoffs) >> 12; // we're hflipped, account for it if (hflip) scaled_xoffs = ((scale * info.width) >> 12) - scaled_xoffs; // adjust for the x and y offsets x -= scaled_xoffs; y -= scaled_yoffs; do { // make sure we didn't end up with 0 int scaled_width = (scale * info.width + 0x7fff) >> 12; int scaled_height = (scale * info.height + 0x7fff) >> 12; if (scaled_width == 0) scaled_width = 1; if (scaled_height == 0) scaled_height = 1; // compute the remaining parameters int sx = x; int sy = y; int ex = sx + scaled_width - 1; int ey = sy + scaled_height - 1; // left edge clip const rectangle &visarea = screen().visible_area(); if (sx < visarea.min_x) sx = visarea.min_x; if (sx > visarea.max_x) break; // right edge clip if (ex > visarea.max_x) ex = visarea.max_x; else if (ex < visarea.min_x) break; // top edge clip if (sy < visarea.min_y) sy = visarea.min_y; else if (sy > visarea.max_y) break; // bottom edge clip if (ey > visarea.max_y) ey = visarea.max_y; else if (ey < visarea.min_y) break; for (int ty = sy; ty <= ey; ty++) { bitmap.pix16(ty, sx) = machine().rand() & 0xff; bitmap.pix16(ty, ex) = machine().rand() & 0xff; } for (int tx = sx; tx <= ex; tx++) { bitmap.pix16(sy, tx) = machine().rand() & 0xff; bitmap.pix16(ey, tx) = machine().rand() & 0xff; } } while (0); fprintf(stderr, " Sprite: c=%04X l=%04X h=%d X=%4d (o=%4d w=%3d) Y=%4d (o=%4d h=%d) s=%04X\n", code, color, hflip, x, -scaled_xoffs, (scale * info.width) >> 12, y, -scaled_yoffs, (scale * info.height) >> 12, scale); } } //************************************************************************** // SPRITE PARAMETER //************************************************************************** //------------------------------------------------- // sprite_parameter: Constructor //------------------------------------------------- atari_rle_objects_device::sprite_parameter::sprite_parameter() : m_word(0), m_shift(0), m_mask(0) { } //------------------------------------------------- // set: Sets the mask via an input 4-word mask. //------------------------------------------------- bool atari_rle_objects_device::sprite_parameter::set(const uint16_t input[8]) { // determine the word and make sure it's only 1 m_word = 0xffff; for (int i = 0; i < 8; i++) if (input[i]) { if (m_word == 0xffff) m_word = i; else return false; } // if all-zero, it's valid if (m_word == 0xffff) { m_word = m_shift = m_mask = 0; return true; } // determine the shift and final mask m_shift = 0; uint16_t temp = input[m_word]; while (!(temp & 1)) { m_shift++; temp >>= 1; } m_mask = temp; return true; } /*************************************************************************** The mapping of the bits from the PROMs is like this: D23 -> D22 -> D21 -> D20 -> D19 -> D18 -> D17 -> instruction bit 8 D16 -> instruction bit 7 D15 -> instruction bit 6 D14 -> instruction bit 5 D13 -> instruction bit 4 D12 -> instruction bit 3 D11 -> instruction bit 2 D10 -> instruction bit 1 (modified via a PAL) D9 -> instruction bit 0 D8 -> carry in D7 -> A bit 3 D6 -> A bit 2 D5 -> A bit 1 D4 -> A bit 0 D3 -> B bit 3 D2 -> B bit 2 D1 -> B bit 1 D0 -> B bit 0 Although much of the logic is contained in the ALU, the program counter is fed externally. Jumps are decoded like this: if (D13 && D14) { switch (D11 | D10 | D9) { case 0: condition = true; case 1: condition = ALU.LT; case 2: condition = ALU.Z; case 3: condition = ALU.N; case 4: condition = BLT.HFLIP; case 5: condition = /BLT.SCAN; case 6: condition = ALU.C; case 7: condition = MOTIMEP; } condition ^= D12; if (condition) PC = D8 | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0; } Here is the code from Guardians of the Hood: I C A B --- - - - 000: A0 C8 00 -> 064 0 0 0 (latch UC.RASCAS) 001: 01 C8 66 -> 0E4 0 6 6 002: 01 89 66 -> 0C4 1 6 6 003: 03 82 66 -> 1C1 0 6 6 004: 01 B8 65 -> 0DC 0 6 5 005: 01 82 66 -> 0C1 0 6 6 006: 01 89 55 -> 0C4 1 5 5 007: 01 C8 77 -> 0E4 0 7 7 008: 01 89 77 -> 0C4 1 7 7 009: 03 82 77 -> 1C1 0 7 7 00A: 03 82 77 -> 1C1 0 7 7 00B: 03 82 77 -> 1C1 0 7 7 00C: 03 82 77 -> 1C1 0 7 7 00D: 01 C8 88 -> 0E4 0 8 8 00E: 01 B8 79 -> 0DC 0 7 9 00F: 03 82 99 -> 1C1 0 9 9 010: 01 82 99 -> 0C1 0 9 9 011: 01 B8 61 -> 0DC 0 6 1 012: 01 82 11 -> 0C1 0 1 1 013: 01 96 11 -> 0CB 0 1 1 014: 03 82 11 -> 1C1 0 1 1 015: 03 82 11 -> 1C1 0 1 1 016: 03 82 11 -> 1C1 0 1 1 017: 03 82 11 -> 1C1 0 1 1 018: 00 EE 18 -> 077 0 1 8 if /MOTIMEP JUMP 018 019: 84 B8 11 -> 05C 0 1 1 01A: 01 B8 72 -> 0DC 0 7 2 01B: 00 C8 00 -> 064 0 0 0 01C: 9C B8 88 -> 05C 0 8 8 01D: 98 B8 88 -> 05C 0 8 8 01E: 01 96 22 -> 0CB 0 2 2 01F: 00 F4 1C -> 07A 0 1 C if NZ JUMP 01C 020: 00 38 11 -> 01C 0 1 1 021: 03 34 00 -> 19A 0 0 0 022: 03 34 00 -> 19A 0 0 0 023: 03 34 00 -> 19A 0 0 0 024: 00 11 99 -> 008 1 9 9 025: 02 34 00 -> 11A 0 0 0 026: 84 B4 00 -> 05A 0 0 0 027: 00 C8 00 -> 064 0 0 0 028: 00 C8 00 -> 064 0 0 0 029: 10 3E 00 -> 01F 0 0 0 02A: 00 E5 3B -> 072 1 3 B if Z JUMP 13B 02B: 00 05 00 -> 002 1 0 0 02C: 9C B4 00 -> 05A 0 0 0 02D: 98 B4 00 -> 05A 0 0 0 02E: 00 EE 2E -> 077 0 2 E if /MOTIMEP JUMP 02E 02F: 10 3E 00 -> 01F 0 0 0 030: 00 05 00 -> 002 1 0 0 031: 00 F4 35 -> 07A 0 3 5 if NZ JUMP 035 032: A8 B8 55 -> 05C 0 5 5 (latch UC.HFLIP) 033: A8 FE 35 -> 07F 0 3 5 if MOTIMEP JUMP 035 (latch UC.HFLIP) 034: 00 E1 47 -> 070 1 4 7 JUMP 147 035: 01 B8 72 -> 0DC 0 7 2 036: 01 B8 8F -> 0DC 0 8 F 037: 01 83 5F -> 0C1 1 5 F 038: 84 B8 FF -> 05C 0 F F 039: 00 EE 39 -> 077 0 3 9 if /MOTIMEP JUMP 039 03A: 19 BE FF -> 0DF 0 F F 03B: 00 E4 68 -> 072 0 6 8 if Z JUMP 068 03C: 84 B8 88 -> 05C 0 8 8 03D: 00 EE 3D -> 077 0 3 D if /MOTIMEP JUMP 03D 03E: 19 BE AA -> 0DF 0 A A 03F: 00 EE 3F -> 077 0 3 F if /MOTIMEP JUMP 03F 040: 19 BE BB -> 0DF 0 B B 041: 00 EE 41 -> 077 0 4 1 if /MOTIMEP JUMP 041 042: 19 BE CC -> 0DF 0 C C 043: 00 EE 43 -> 077 0 4 3 if /MOTIMEP JUMP 043 044: 19 BE DD -> 0DF 0 D D 045: 00 EE 45 -> 077 0 4 5 if /MOTIMEP JUMP 045 046: 19 BE EE -> 0DF 0 E E 047: 00 C8 00 -> 064 0 0 0 048: 01 82 1F -> 0C1 0 1 F 049: 84 B8 FF -> 05C 0 F F 04A: 11 BE FF -> 0DF 0 F F 04B: 00 C8 00 -> 064 0 0 0 04C: 00 C8 00 -> 064 0 0 0 04D: 9C B8 99 -> 05C 0 9 9 04E: 90 B8 99 -> 05C 0 9 9 04F: 00 C8 00 -> 064 0 0 0 050: 84 B8 99 -> 05C 0 9 9 051: 9C B8 AA -> 05C 0 A A 052: 98 B8 AA -> 05C 0 A A 053: 00 C8 00 -> 064 0 0 0 054: 00 C8 00 -> 064 0 0 0 055: 9C B8 BB -> 05C 0 B B 056: 98 B8 BB -> 05C 0 B B 057: 00 C8 00 -> 064 0 0 0 058: 00 C8 00 -> 064 0 0 0 059: 9C B8 CC -> 05C 0 C C 05A: 98 B8 CC -> 05C 0 C C 05B: 00 C8 00 -> 064 0 0 0 05C: 00 C8 00 -> 064 0 0 0 05D: 9C B8 DD -> 05C 0 D D 05E: 98 B8 DD -> 05C 0 D D 05F: 00 C8 00 -> 064 0 0 0 060: 00 C8 00 -> 064 0 0 0 061: 9C B8 EE -> 05C 0 E E 062: 98 B8 EE -> 05C 0 E E 063: 00 C8 00 -> 064 0 0 0 064: 00 C8 00 -> 064 0 0 0 065: 9C B8 FF -> 05C 0 F F 066: 98 B8 FF -> 05C 0 F F 067: 01 82 69 -> 0C1 0 6 9 068: 01 82 68 -> 0C1 0 6 8 069: 01 96 22 -> 0CB 0 2 2 06A: 00 F4 36 -> 07A 0 3 6 if NZ JUMP 036 06B: 01 B8 72 -> 0DC 0 7 2 06C: 01 96 22 -> 0CB 0 2 2 06D: 01 C8 44 -> 0E4 0 4 4 06E: 01 96 44 -> 0CB 0 4 4 06F: 01 B8 43 -> 0DC 0 4 3 070: 02 B8 44 -> 15C 0 4 4 071: 02 B8 44 -> 15C 0 4 4 072: 02 B8 44 -> 15C 0 4 4 073: 02 B8 44 -> 15C 0 4 4 074: 02 B8 33 -> 15C 0 3 3 075: 01 93 43 -> 0C9 1 4 3 076: 02 B8 33 -> 15C 0 3 3 077: 00 38 33 -> 01C 0 3 3 078: 01 C8 33 -> 0E4 0 3 3 079: 01 89 33 -> 0C4 1 3 3 07A: 01 82 33 -> 0C1 0 3 3 07B: 01 C8 00 -> 0E4 0 0 0 07C: 00 B8 00 -> 05C 0 0 0 07D: 00 F4 87 -> 07A 0 8 7 if NZ JUMP 087 07E: 01 89 11 -> 0C4 1 1 1 07F: 84 B8 11 -> 05C 0 1 1 080: 00 EE 80 -> 077 0 8 0 if /MOTIMEP JUMP 080 081: 11 BE 00 -> 0DF 0 0 0 082: A4 B8 22 -> 05C 0 2 2 (latch UC.COLOR) 083: 01 96 22 -> 0CB 0 2 2 084: 00 F6 7C -> 07B 0 7 C if P JUMP 07C 085: 8C B8 22 -> 05C 0 2 2 086: 00 E0 86 -> 070 0 8 6 JUMP 086 087: 84 B8 00 -> 05C 0 0 0 088: 00 EE 88 -> 077 0 8 8 if /MOTIMEP JUMP 088 089: 19 BE 55 -> 0DF 0 5 5 08A: A8 B8 55 -> 05C 0 5 5 (latch UC.HFLIP) 08B: 03 82 55 -> 1C1 0 5 5 08C: 00 C8 00 -> 064 0 0 0 08D: 19 BE FF -> 0DF 0 F F 08E: A4 B8 FF -> 05C 0 F F (latch UC.COLOR) 08F: 00 C8 00 -> 064 0 0 0 090: 00 C8 00 -> 064 0 0 0 091: 19 BE 66 -> 0DF 0 6 6 092: B0 C8 00 -> 064 0 0 0 (latch UC.FORMAT) 093: 00 C8 00 -> 064 0 0 0 094: 00 C8 00 -> 064 0 0 0 095: 19 BE 77 -> 0DF 0 7 7 096: 00 C8 00 -> 064 0 0 0 097: 00 C8 00 -> 064 0 0 0 098: 00 C8 00 -> 064 0 0 0 099: 19 BE 88 -> 0DF 0 8 8 09A: 00 C8 00 -> 064 0 0 0 09B: 00 C8 00 -> 064 0 0 0 09C: 00 C8 00 -> 064 0 0 0 09D: 19 BE 00 -> 0DF 0 0 0 09E: 84 B8 55 -> 05C 0 5 5 09F: 00 C8 00 -> 064 0 0 0 0A0: 00 C8 00 -> 064 0 0 0 0A1: 09 BE DD -> 0DF 0 D D 0A2: 00 C8 00 -> 064 0 0 0 0A3: 00 C8 00 -> 064 0 0 0 0A4: 09 BE EE -> 0DF 0 E E 0A5: 01 C8 AA -> 0E4 0 A A 0A6: 01 C8 BB -> 0E4 0 B B 0A7: 09 BE 99 -> 0DF 0 9 9 0A8: 01 B8 8F -> 0DC 0 8 F 0A9: 01 82 FF -> 0C1 0 F F 0AA: 09 BE 55 -> 0DF 0 5 5 0AB: 01 C8 CC -> 0E4 0 C C 0AC: 00 B8 DD -> 05C 0 D D 0AD: 00 F6 B1 -> 07B 0 B 1 if P JUMP 0B1 0AE: 01 A9 DD -> 0D4 1 D D 0AF: 01 82 4C -> 0C1 0 4 C 0B0: 01 89 CC -> 0C4 1 C C 0B1: 01 82 CC -> 0C1 0 C C 0B2: 00 B8 EE -> 05C 0 E E 0B3: 00 F6 B7 -> 07B 0 B 7 if P JUMP 0B7 0B4: 01 A9 EE -> 0D4 1 E E 0B5: 01 82 4C -> 0C1 0 4 C 0B6: 01 89 CC -> 0C4 1 C C 0B7: 03 82 CC -> 1C1 0 C C 0B8: 01 82 FF -> 0C1 0 F F 0B9: 43 86 DA -> 1C3 0 D A 0BA: 43 86 EB -> 1C3 0 E B 0BB: 01 82 FF -> 0C1 0 F F 0BC: 43 86 DA -> 1C3 0 D A 0BD: 43 86 EB -> 1C3 0 E B 0BE: 01 82 FF -> 0C1 0 F F 0BF: 43 86 DA -> 1C3 0 D A 0C0: 43 86 EB -> 1C3 0 E B 0C1: 01 82 FF -> 0C1 0 F F 0C2: 43 86 DA -> 1C3 0 D A 0C3: 43 86 EB -> 1C3 0 E B 0C4: 01 82 FF -> 0C1 0 F F 0C5: 43 86 DA -> 1C3 0 D A 0C6: 43 86 EB -> 1C3 0 E B 0C7: 01 82 FF -> 0C1 0 F F 0C8: 43 86 DA -> 1C3 0 D A 0C9: 43 86 EB -> 1C3 0 E B 0CA: 01 82 FF -> 0C1 0 F F 0CB: 43 86 DA -> 1C3 0 D A 0CC: 43 86 EB -> 1C3 0 E B 0CD: 01 82 FF -> 0C1 0 F F 0CE: 41 86 DA -> 0C3 0 D A 0CF: 41 86 EB -> 0C3 0 E B 0D0: 02 B8 DD -> 15C 0 D D 0D1: 02 B8 EE -> 15C 0 E E 0D2: 01 82 FF -> 0C1 0 F F 0D3: 41 86 DA -> 0C3 0 D A 0D4: 41 86 EB -> 0C3 0 E B 0D5: 02 B8 DD -> 15C 0 D D 0D6: 02 B8 EE -> 15C 0 E E 0D7: 01 82 FF -> 0C1 0 F F 0D8: 41 86 DA -> 0C3 0 D A 0D9: 41 86 EB -> 0C3 0 E B 0DA: 02 B8 DD -> 15C 0 D D 0DB: 02 B8 EE -> 15C 0 E E 0DC: 01 82 FF -> 0C1 0 F F 0DD: 41 86 DA -> 0C3 0 D A 0DE: 41 86 EB -> 0C3 0 E B 0DF: 00 B8 CC -> 05C 0 C C 0E0: 00 F6 E2 -> 07B 0 E 2 if P JUMP 0E2 0E1: 01 A9 AA -> 0D4 1 A A 0E2: 01 82 CC -> 0C1 0 C C 0E3: 00 F6 E5 -> 07B 0 E 5 if P JUMP 0E5 0E4: 01 A9 BB -> 0D4 1 B B 0E5: 01 C8 CC -> 0E4 0 C C 0E6: 01 89 CC -> 0C4 1 C C 0E7: 03 82 CC -> 1C1 0 C C 0E8: 03 82 CC -> 1C1 0 C C 0E9: 03 82 CC -> 1C1 0 C C 0EA: 01 B8 4F -> 0DC 0 4 F 0EB: 03 82 FF -> 1C1 0 F F 0EC: 00 D2 48 -> 069 0 4 8 0ED: 00 E5 19 -> 072 1 1 9 if Z JUMP 119 0EE: 02 B8 88 -> 15C 0 8 8 0EF: 02 B8 88 -> 15C 0 8 8 0F0: 02 B8 88 -> 15C 0 8 8 0F1: 02 B8 88 -> 15C 0 8 8 0F2: 01 80 88 -> 0C0 0 8 8 0F3: 84 B8 88 -> 05C 0 8 8 0F4: 00 EE F4 -> 077 0 F 4 if /MOTIMEP JUMP 0F4 0F5: 19 BE 88 -> 0DF 0 8 8 0F6: AC B8 88 -> 05C 0 8 8 (latch UC.RATE) 0F7: 01 82 88 -> 0C1 0 8 8 0F8: 02 B8 88 -> 15C 0 8 8 0F9: 00 F8 FC -> 07C 0 F C if /BLT.HFLIP JUMP 0FC 0FA: 01 82 A6 -> 0C1 0 A 6 0FB: 00 E0 FD -> 070 0 F D JUMP 0FD 0FC: 01 93 A6 -> 0C9 1 A 6 0FD: 01 93 B7 -> 0C9 1 B 7 0FE: B0 B8 99 -> 05C 0 9 9 (latch UC.FORMAT) 0FF: 84 B8 55 -> 05C 0 5 5 100: 01 C8 EE -> 0E4 0 E E 101: 00 C8 00 -> 064 0 0 0 102: 09 BE DD -> 0DF 0 D D 103: 00 E6 7C -> 073 0 7 C if N JUMP 07C 104: 00 93 F7 -> 049 1 F 7 105: 00 ED 0B -> 076 1 0 B if C JUMP 10B 106: B4 B8 DD -> 05C 0 D D (latch UC.TRANS) 107: B8 B8 77 -> 05C 0 7 7 (latch UC.XYPOS) 108: A0 B8 33 -> 05C 0 3 3 (latch UC.RASCAS) 109: B8 B8 66 -> 05C 0 6 6 (latch UC.XYPOS) 10A: BC C8 00 -> 064 0 0 0 (latch UC.SCAN) 10B: 01 82 C7 -> 0C1 0 C 7 10C: 01 82 8E -> 0C1 0 8 E 10D: 00 D2 4E -> 069 0 4 E 10E: 00 E5 14 -> 072 1 1 4 if Z JUMP 114 10F: 01 93 4E -> 0C9 1 4 E 110: 01 96 EE -> 0CB 0 E E 111: 01 83 D5 -> 0C1 1 D 5 112: 00 FD 14 -> 07E 1 1 4 if NC JUMP 114 113: 01 89 99 -> 0C4 1 9 9 114: 00 FB 14 -> 07D 1 1 4 if BLT.SCAN JUMP 114 115: A0 C8 00 -> 064 0 0 0 (latch UC.RASCAS) 116: 84 B8 55 -> 05C 0 5 5 117: B0 B8 99 -> 05C 0 9 9 (latch UC.FORMAT) 118: 00 E1 02 -> 070 1 0 2 JUMP 102 119: AC B8 88 -> 05C 0 8 8 (latch UC.RATE) 11A: 00 F9 1D -> 07C 1 1 D if /BLT.HFLIP JUMP 11D 11B: 01 82 A6 -> 0C1 0 A 6 11C: 00 E1 1E -> 070 1 1 E JUMP 11E 11D: 01 93 A6 -> 0C9 1 A 6 11E: 01 93 B7 -> 0C9 1 B 7 11F: B0 B8 99 -> 05C 0 9 9 (latch UC.FORMAT) 120: 84 B8 55 -> 05C 0 5 5 121: 01 B8 4E -> 0DC 0 4 E 122: 01 89 EE -> 0C4 1 E E 123: 02 B8 EE -> 15C 0 E E 124: 09 BE DD -> 0DF 0 D D 125: 00 E6 7C -> 073 0 7 C if N JUMP 07C 126: 01 82 8E -> 0C1 0 8 E 127: 00 D2 4E -> 069 0 4 E 128: 00 E5 33 -> 072 1 3 3 if Z JUMP 133 129: 01 93 4E -> 0C9 1 4 E 12A: 01 96 EE -> 0CB 0 E E 12B: 00 93 F7 -> 049 1 F 7 12C: 00 ED 32 -> 076 1 3 2 if C JUMP 132 12D: B4 B8 DD -> 05C 0 D D (latch UC.TRANS) 12E: B8 B8 77 -> 05C 0 7 7 (latch UC.XYPOS) 12F: A0 B8 33 -> 05C 0 3 3 (latch UC.RASCAS) 130: B8 B8 66 -> 05C 0 6 6 (latch UC.XYPOS) 131: BC C8 00 -> 064 0 0 0 (latch UC.SCAN) 132: 01 82 C7 -> 0C1 0 C 7 133: 01 83 D5 -> 0C1 1 D 5 134: 00 FD 36 -> 07E 1 3 6 if NC JUMP 136 135: 01 89 99 -> 0C4 1 9 9 136: 00 FB 36 -> 07D 1 3 6 if BLT.SCAN JUMP 136 137: A0 C8 00 -> 064 0 0 0 (latch UC.RASCAS) 138: 84 B8 55 -> 05C 0 5 5 139: B0 B8 99 -> 05C 0 9 9 (latch UC.FORMAT) 13A: 00 E1 24 -> 070 1 2 4 JUMP 124 13B: 08 3E 00 -> 01F 0 0 0 13C: 00 EF 3C -> 077 1 3 C if /MOTIMEP JUMP 13C 13D: 18 3E 00 -> 01F 0 0 0 13E: 00 E5 75 -> 072 1 7 5 if Z JUMP 175 13F: 00 C8 00 -> 064 0 0 0 140: 9C B8 44 -> 05C 0 4 4 141: 98 B8 44 -> 05C 0 4 4 142: 00 C8 00 -> 064 0 0 0 143: 00 C8 00 -> 064 0 0 0 144: 9C B8 11 -> 05C 0 1 1 145: 98 B8 11 -> 05C 0 1 1 146: 00 E1 5A -> 070 1 5 A JUMP 15A 147: 00 38 11 -> 01C 0 1 1 148: 03 34 00 -> 19A 0 0 0 149: 03 34 00 -> 19A 0 0 0 14A: 03 34 00 -> 19A 0 0 0 14B: 00 11 99 -> 008 1 9 9 14C: 00 EF 4C -> 077 1 4 C if /MOTIMEP JUMP 14C 14D: 02 34 00 -> 11A 0 0 0 14E: 84 B4 00 -> 05A 0 0 0 14F: 01 C8 00 -> 0E4 0 0 0 150: 9C B8 00 -> 05C 0 0 0 151: 98 B8 00 -> 05C 0 0 0 152: 00 C8 00 -> 064 0 0 0 153: 00 C8 00 -> 064 0 0 0 154: 9C B8 11 -> 05C 0 1 1 155: 98 B8 11 -> 05C 0 1 1 156: 00 C8 00 -> 064 0 0 0 157: 00 C8 00 -> 064 0 0 0 158: 9C B8 44 -> 05C 0 4 4 159: 98 B8 44 -> 05C 0 4 4 15A: 09 BE DD -> 0DF 0 D D 15B: 01 82 8E -> 0C1 0 8 E 15C: 00 D2 4E -> 069 0 4 E 15D: 00 E5 67 -> 072 1 6 7 if Z JUMP 167 15E: 01 93 4E -> 0C9 1 4 E 15F: 01 96 EE -> 0CB 0 E E 160: 00 93 F7 -> 049 1 F 7 161: 00 ED 67 -> 076 1 6 7 if C JUMP 167 162: B4 B8 DD -> 05C 0 D D (latch UC.TRANS) 163: B8 B8 77 -> 05C 0 7 7 (latch UC.XYPOS) 164: A0 B8 33 -> 05C 0 3 3 (latch UC.RASCAS) 165: B8 B8 66 -> 05C 0 6 6 (latch UC.XYPOS) 166: BC C8 00 -> 064 0 0 0 (latch UC.SCAN) 167: 01 82 C7 -> 0C1 0 C 7 168: 01 83 D5 -> 0C1 1 D 5 169: 00 FD 6C -> 07E 1 6 C if NC JUMP 16C 16A: 01 89 99 -> 0C4 1 9 9 16B: 01 C8 00 -> 0E4 0 0 0 16C: 01 96 00 -> 0CB 0 0 0 16D: 00 F5 6C -> 07A 1 6 C if NZ JUMP 16C 16E: A0 C8 00 -> 064 0 0 0 (latch UC.RASCAS) 16F: 84 B8 55 -> 05C 0 5 5 170: B0 B8 99 -> 05C 0 9 9 (latch UC.FORMAT) 171: 01 C8 00 -> 0E4 0 0 0 172: 01 96 00 -> 0CB 0 0 0 173: 00 F5 72 -> 07A 1 7 2 if NZ JUMP 172 174: 00 E1 5A -> 070 1 5 A JUMP 15A 175: 84 B8 88 -> 05C 0 8 8 176: 00 EF 76 -> 077 1 7 6 if /MOTIMEP JUMP 176 177: 19 BE AA -> 0DF 0 A A 178: B0 B8 AA -> 05C 0 A A (latch UC.FORMAT) 179: 01 C8 77 -> 0E4 0 7 7 17A: 84 B8 77 -> 05C 0 7 7 17B: 01 C8 BB -> 0E4 0 B B 17C: 00 C8 00 -> 064 0 0 0 17D: 00 C8 00 -> 064 0 0 0 17E: 00 C8 00 -> 064 0 0 0 17F: 08 3E 00 -> 01F 0 0 0 180: 01 80 BB -> 0C0 0 B B 181: 01 89 77 -> 0C4 1 7 7 182: 00 F5 7F -> 07A 1 7 F if NZ JUMP 17F 183: 84 B8 AA -> 05C 0 A A 184: 00 C8 00 -> 064 0 0 0 185: 00 C8 00 -> 064 0 0 0 186: 9C B8 BB -> 05C 0 B B 187: 98 B8 BB -> 05C 0 B B 188: 01 96 AA -> 0CB 0 A A 189: 00 F7 8B -> 07B 1 8 B if P JUMP 18B 18A: 00 E1 8A -> 070 1 8 A JUMP 18A 18B: 00 C8 00 -> 064 0 0 0 18C: 00 E1 78 -> 070 1 7 8 JUMP 178 ***************************************************************************/