Working on High-Res mode

captainys · Oct 21, 2020 · fe427da · fe427da
1 parent 9c390bf
commit fe427da
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Showing 4 changed files with 56 additions and 2 deletions.
diff --git a/src/towns/crtc/crtc.cpp b/src/towns/crtc/crtc.cpp
@@ -540,8 +540,8 @@ unsigned int TownsCRTC::GetPageBitsPerPixel(unsigned char page) const
 			return 4;
 		}
 	}
-	std::cout << __FUNCTION__ << std::endl;
-	std::cout << "Unknown color setting." << std::endl;
+	// std::cout << __FUNCTION__ << std::endl;
+	// std::cout << "Unknown color setting." << std::endl;
 	return 4; // What else can I do?
 }
 unsigned int TownsCRTC::GetPageVRAMAddressOffset(unsigned char page) const
@@ -1105,6 +1105,17 @@ void TownsCRTC::MEMIOWriteFMRVRAMDisplayMode(unsigned char data)
 				data|=1;
 			}
 			break;
+		case HIGHRES_REG_VSYNC1:
+			// Based on TBIOS disassembly.
+			if(true==InVSYNC(townsPtr->state.townsTime))
+			{
+				data=2;
+			}
+			else
+			{
+				data=0;
+			}
+			break;
 		default:
 			data=state.highResCrtcReg[state.highResCrtcRegAddrLatch];
 			break;
@@ -1122,8 +1133,10 @@ void TownsCRTC::MEMIOWriteFMRVRAMDisplayMode(unsigned char data)
 		}
 		break;
 	case TOWNSIO_MX_IMGOUT_D2://   0x476,
+		data=((state.highResCrtcReg[state.highResCrtcRegAddrLatch]>>16)&0xFF);
 		break;
 	case TOWNSIO_MX_IMGOUT_D3://   0x477,
+		data=((state.highResCrtcReg[state.highResCrtcRegAddrLatch]>>24)&0xFF);
 		break;
 
 	case TOWNSIO_HSYNC_VSYNC:

diff --git a/src/towns/crtc/crtc.h b/src/towns/crtc/crtc.h
@@ -98,6 +98,7 @@ class TownsCRTC : public Device
 		HIGHRES_REG_CTRL1   =0x004,   // Read bit0=HighResEnabled bit1=(Initial=1, WriteToBit1->0, HighResoDisabled->1)   Write bit1=1->bit0=0
 
 		HIGHRES_REG_DISPPAGE=0x005,   // Prob  
+		HIGHRES_REG_VSYNC1  =0x006,   // Prob
 		HIGHRES_REG_HSYNC2  =0x100,
 		HIGHRES_REG_HSYNC3  =0x101,
 		HIGHRES_REG_VSYNC2  =0x102,

diff --git a/symtables/RUNMX.txt b/symtables/RUNMX.txt
@@ -59,6 +59,46 @@ P
 M 0
 /end
 /begin0
+T 1
+* 00000110:00001847
+# 
+R 
+L (Prob)Set High-Res Mode on Initial TMENU Start
+P 
+% 0
+M 0
+/end
+/begin0
+T 1
+* 00000110:00001874
+# 
+R 
+L (Prob)Set Normal Resolution Mode
+P 
+% 0
+M 0
+/end
+/begin0
+T 1
+* 00000110:00001899
+# 
+R 
+L (Prob)Set High-Res Mode
+P 
+% 0
+M 0
+/end
+/begin0
+T 1
+* 00000110:000026B0
+# 
+R 
+L (Prob)High-Res CRTC Wait VSYNC flip
+P 
+% 0
+M 0
+/end
+/begin0
 T 0
 * 00000F45:0000005A
 # IO.SYS:Initialize Real-Mode INT Vector

diff --git a/testdata/CMOS.BIN b/testdata/CMOS.BIN