X-Git-Url: http://git.squeep.com/?p=dcpu16;a=blobdiff_plain;f=hw_lem1802.c;fp=hw_lem1802.c;h=e7e618393fc4e313607a24b7f9022a012656b1ae;hp=1be1810fa933720c3da6436b04be742d1633248e;hb=ce296c260b229bb5c2e866db7842f3a46ea8c4b7;hpb=ca03eaaf8fc937a38221cb724857276ece6fd816 diff --git a/hw_lem1802.c b/hw_lem1802.c index 1be1810..e7e6183 100644 --- a/hw_lem1802.c +++ b/hw_lem1802.c @@ -2,6 +2,7 @@ #include #include #include +#include #ifdef HAVE_LIBPNG #include @@ -39,6 +40,8 @@ static struct dcpu16_hw hw_ = { .data = (struct lem1802_ *)NULL }; +#define LEM1802_POWER_ON_CYCLES 100000 /* this should vary by, let us say, 10% */ + #define PIX_X 160 /* pixels in display */ #define PIX_Y 128 /* pixels in display */ #define PIX_BORDER 16 /* border pixels from edge to first tile */ @@ -75,7 +78,8 @@ struct pixel_ { }; struct lem1802_ { - long long cycle_activated; /* for tracking 'turn on delay' */ + long long cycle_activated; /* running since */ + long long cycles_until_active_; /* for tracking power-up delay */ DCPU16_WORD video_base; DCPU16_WORD font_base; @@ -90,10 +94,32 @@ struct lem1802_ { unsigned int blink_tally_; /* tick */ unsigned int blink_state; + enum cycle_state_ { + CYCLE_IDLE, + CYCLE_COPY_TO_RAM, + } cycle_state_; + const DCPU16_WORD *cycle_state_copy_src_ptr_; + DCPU16_WORD cycle_state_copy_dst_addr_; + size_t cycle_state_copy_words_; + int (*render)(void *, struct pixel_ *, size_t, size_t); void *renderer_data; }; +static +long long power_on_cycles_(void) { + struct tv; + long long r = 0; + +#if WANT_DELAY_START + gettimeofday(&tv, NULL); + r += LEM1802_POWER_ON_CYCLES - (LEM1802_POWER_ON_CYCLES / 10); + r += tv.tv_usec % (LEM1802_POWER_ON_CYCLES / 5); +#endif + + return r; +} + static inline void pixel_color_(struct pixel_ *pix, DCPU16_WORD color) { unsigned char x; @@ -206,8 +232,14 @@ void lem1802_pixbuf_refresh_full_(struct lem1802_ *display, DCPU16_WORD *mem) { TRACE("%s>> video_base:0x%04x", __func__, display->video_base); #endif + if (display->cycles_until_active_) { + /* show cute power-up sequence.. */ + memset(display->pixbuf, 0, PIX_X * PIX_Y * sizeof *display->pixbuf); + return; + } + if (display->video_base == 0) { - /* disconnected, blank display. static might be fun, too */ + /* disconnected, blank display */ memset(display->pixbuf, 0, PIX_X * PIX_Y * sizeof *display->pixbuf); return; } @@ -332,7 +364,8 @@ int pixbuf_render_vnc_(void *data, struct pixel_ *pixbuf, size_t x, size_t y) { (void)pixbuf; /* derp */ - rfbMarkRectAsModified(s, 0, 0, x, y); + if (s) + rfbMarkRectAsModified(s, 0, 0, x, y); TRACE("%s>>", __func__); @@ -359,6 +392,8 @@ void lem1802_reset_(struct dcpu16 *vm, void *data) { display->blink_tally_ = 0; display->blink_state = 0; + display->cycle_state_ = 0; + #if DEBUG vm->trace_cb_("%s>>", __func__); #endif /* DEBUG */ @@ -370,10 +405,8 @@ void lem1802_cycle_(struct dcpu16 *vm, void *data) { (void)vm; /* - maybe just step through video memory (if set) - one word per clock..? could just cheat and - use accounting callbacks.. - + for more cycle-accuracy, could step through video memory, if set, + one word per clock.. for now just count cycles and issue a full refresh/render every so often */ @@ -393,6 +426,33 @@ void lem1802_cycle_(struct dcpu16 *vm, void *data) { lem1802_pixbuf_refresh_full_(display, vm->ram); display->render(display->renderer_data, display->pixbuf, PIX_X, PIX_Y); } + + switch (display->cycle_state_) { + case CYCLE_IDLE: + break; + + case CYCLE_COPY_TO_RAM: + TRACE("%s>> copy_to_ram words:%zu src:%p dst_addr:0x%04x", + __func__, + display->cycle_state_copy_words_, + display->cycle_state_copy_src_ptr_, + display->cycle_state_copy_dst_addr_); + vm->ram[display->cycle_state_copy_dst_addr_] = *display->cycle_state_copy_src_ptr_; + display->cycle_state_copy_dst_addr_++; + display->cycle_state_copy_src_ptr_++; + display->cycle_state_copy_words_--; + if (display->cycle_state_copy_words_ == 0) { + display->cycle_state_ = CYCLE_IDLE; + } + break; + } + + if (display->cycles_until_active_) { + display->cycles_until_active_--; + if (display->cycles_until_active_ == 0) { + TRACE("%s>> display now active", __func__); + } + } } static @@ -400,14 +460,14 @@ void lem1802_hwi_(struct dcpu16 *vm, void *data) { struct lem1802_ *display = (struct lem1802_ *)data; DCPU16_WORD reg_a = vm->reg[DCPU16_REG_A]; DCPU16_WORD reg_b = vm->reg[DCPU16_REG_B]; - size_t i; TRACE("%s>> A:0x%04x B:0x%04x", __func__, reg_a, reg_b); switch (reg_a) { case 0: /* MEM_MAP_SCREEN */ if (display->cycle_activated == 0 && reg_b) { - display->cycle_activated = vm->cycle; + display->cycle_activated = vm->cycle_; + display->cycles_until_active_ = power_on_cycles_(); } display->video_base = reg_b; if (reg_b == 0) @@ -427,23 +487,19 @@ void lem1802_hwi_(struct dcpu16 *vm, void *data) { break; case 4: /* MEM_DUMP_FONT */ - for (i = 0; i < 128 ; i++) { - vm->ram[reg_b] = chargen_4x8_glyphs[reg_b][0] << 8; - vm->ram[reg_b] |= chargen_4x8_glyphs[reg_b][1]; - reg_b += 1; - vm->ram[reg_b] = chargen_4x8_glyphs[reg_b][2] << 8; - vm->ram[reg_b] |= chargen_4x8_glyphs[reg_b][3]; - reg_b += 1; - } - vm->cycle += 256; + display->cycle_state_copy_src_ptr_ = (DCPU16_WORD *)chargen_4x8_glyphs; + display->cycle_state_copy_dst_addr_ = reg_b; + display->cycle_state_copy_words_ = 256; + display->cycle_state_ = CYCLE_COPY_TO_RAM; + dcpu16_cycle_inc(vm, 256); break; case 5: /* MEM_DUMP_PALETTE */ - for (i = 0; i < 16; i++) { - vm->ram[reg_b] = palette_default_[i]; - reg_b += 1; - } - vm->cycle += 16; + display->cycle_state_copy_src_ptr_ = palette_default_; + display->cycle_state_copy_dst_addr_ = reg_b; + display->cycle_state_copy_words_ = 16; + display->cycle_state_ = CYCLE_COPY_TO_RAM; + dcpu16_cycle_inc(vm, 16); break; } }