#include <stdio.h>
#include <string.h>
#include <errno.h>
+#include <sys/time.h>
#ifdef HAVE_LIBPNG
#include <setjmp.h>
.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 */
};
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;
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;
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;
}
(void)pixbuf;
/* derp */
- rfbMarkRectAsModified(s, 0, 0, x, y);
+ if (s)
+ rfbMarkRectAsModified(s, 0, 0, x, y);
TRACE("%s>>", __func__);
display->blink_tally_ = 0;
display->blink_state = 0;
+ display->cycle_state_ = 0;
+
#if DEBUG
vm->trace_cb_("%s>>", __func__);
#endif /* DEBUG */
(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
*/
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
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)
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;
}
}