- uoffs = tunrot;
-
- top = vram[backbuf] + 20;
- bot = vram[backbuf] + 159 * 240 / 2 + 20;
- tunptr = tunmap;
- for(i=0; i<80; i++) {
- for(j=0; j<160/2; j++) {
-#ifdef VBLBAR
- if(j == 160/4) {
- tunptr++;
- top++;
- bot++;
- continue;
+ uoffs = flip ? -nframes : nframes;
+
+ top = vram[backbuf];
+ bot = vram[backbuf] + 159 * 240 / 2;
+ tunptr = tunmap + tunturn * 9600;
+
+ if(flip) {
+ tunptr += 240/2;
+ for(i=0; i<80; i++) {
+ for(j=0; j<240/2; j++) {
+ tun = *--tunptr;
+ tun = (tun >> 16) | (tun << 16);
+
+ angle = tun & 0xff;
+ depth = (tun >> 8) & 0xff;
+ tx = ~((angle >> 1) - uoffs) & 0x1f;
+ ty = ((depth >> 1) + zoffs) & 0x1f;
+ pptop = tex[(ty << 5) + tx];
+ tx = ((angle >> 1) + uoffs) & 0x1f;
+ ppbot = tex[(ty << 5) + tx];
+
+ angle = (tun >> 16) & 0xff;
+ depth = (tun >> 24) & 0xff;
+ tx = ~((angle >> 1) - uoffs) & 0x1f;
+ ty = ((depth >> 1) + zoffs) & 0x1f;
+ pptop |= (uint16_t)tex[(ty << 5) + tx] << 8;
+ tx = ((angle >> 1) + uoffs) & 0x1f;
+ ppbot |= (uint16_t)tex[(ty << 5) + tx] << 8;
+
+ *top++ = pptop;
+ *bot++ = ppbot;