+ gpu.gp0 = 0;
+ gpu.regs[3] = 1;
+ gpu.screen.hres = gpu.screen.w = 256;
+ gpu.screen.vres = gpu.screen.h = 240;
+}
+
+static noinline void update_width(void)
+{
+ int sw = gpu.screen.x2 - gpu.screen.x1;
+ if (sw <= 0 || sw >= 2560)
+ // full width
+ gpu.screen.w = gpu.screen.hres;
+ else
+ gpu.screen.w = sw * gpu.screen.hres / 2560;
+}
+
+static noinline void update_height(void)
+{
+ int sh = gpu.screen.y2 - gpu.screen.y1;
+ if (gpu.status.dheight)
+ sh *= 2;
+ if (sh <= 0)
+ sh = gpu.screen.vres;
+
+ gpu.screen.h = sh;
+}
+
+static noinline void decide_frameskip(void)
+{
+ if (gpu.frameskip.active)
+ gpu.frameskip.cnt++;
+ else {
+ gpu.frameskip.cnt = 0;
+ gpu.frameskip.frame_ready = 1;
+ }
+
+ if (!gpu.frameskip.active && *gpu.frameskip.advice)
+ gpu.frameskip.active = 1;
+ else if (gpu.frameskip.set > 0 && gpu.frameskip.cnt < gpu.frameskip.set)
+ gpu.frameskip.active = 1;
+ else
+ gpu.frameskip.active = 0;
+}
+
+static noinline void decide_frameskip_allow(uint32_t cmd_e3)
+{
+ // no frameskip if it decides to draw to display area,
+ // but not for interlace since it'll most likely always do that
+ uint32_t x = cmd_e3 & 0x3ff;
+ uint32_t y = (cmd_e3 >> 10) & 0x3ff;
+ gpu.frameskip.allow = gpu.status.interlace ||
+ (uint32_t)(x - gpu.screen.x) >= (uint32_t)gpu.screen.w ||
+ (uint32_t)(y - gpu.screen.y) >= (uint32_t)gpu.screen.h;
+}
+
+static noinline void get_gpu_info(uint32_t data)
+{
+ switch (data & 0x0f) {
+ case 0x02:
+ case 0x03:
+ case 0x04:
+ case 0x05:
+ gpu.gp0 = gpu.ex_regs[data & 7] & 0xfffff;
+ break;
+ case 0x06:
+ gpu.gp0 = gpu.ex_regs[5] & 0xfffff;
+ break;
+ case 0x07:
+ gpu.gp0 = 2;
+ break;
+ default:
+ gpu.gp0 = 0;
+ break;
+ }
+}
+
+long GPUinit(void)
+{
+ int ret;
+ ret = vout_init();
+ ret |= renderer_init();
+
+ gpu.state.frame_count = &gpu.zero;
+ gpu.state.hcnt = &gpu.zero;
+ do_reset();
+ return ret;