systembus_bits: add istext

aica/aica_common.hpp

@@ -263,11 +263,11 @@ struct aica_common {
 
   uint32_t SGC() const
   {
-    return (static_cast<uint32_t>((reg_2810 >> 14) & 0x1) << 0);
+    return (static_cast<uint32_t>((reg_2810 >> 13) & 0x3) << 0);
   }
   void SGC(const uint32_t v)
   {
-    reg_2810 = (((v >> 0) & 0x1) << 14) | (reg_2810 & 0xbfff);
+    reg_2810 = (((v >> 0) & 0x3) << 13) | (reg_2810 & 0x9fff);
   }
 
   uint32_t EG() const
@@ -714,7 +714,7 @@ namespace aica {
   }
   namespace lp_sgc_eg {
     constexpr uint32_t LP(const uint32_t reg) { return (static_cast<uint32_t>((reg >> 15) & 0x1) << 0); }
-    constexpr uint32_t SGC(const uint32_t reg) { return (static_cast<uint32_t>((reg >> 14) & 0x1) << 0); }
+    constexpr uint32_t SGC(const uint32_t reg) { return (static_cast<uint32_t>((reg >> 13) & 0x3) << 0); }
     constexpr uint32_t EG(const uint32_t reg) { return (static_cast<uint32_t>((reg >> 0) & 0x1fff) << 0); }
   }
   namespace ca {

regs/aica_common_data.csv

@@ -17,7 +17,7 @@
 "MSLC",,"0x280c","13-8",,"w"
 "MOBUF",,"0x280c","7-0",,"w"
 "LP",,"0x2810","15",,"r"
-"SGC",,"0x2810","14",,"r"
+"SGC",,"0x2810","14-13",,"r"
 "EG",,"0x2810","12-0",,"r"
 "CA",,"0x2814","15-0",,"r"
 "DMEA","0","0x2880","15-9","22-16","w"

regs/systembus_bits.csv

@@ -60,3 +60,8 @@
 "FFST",,"5","holly_cpu_if_block_internal_write_buffer",,,
 "FFST",,"4","holly_g2_if_block_internal_write_buffer",,,
 "FFST",,"0","aica_internal_write_buffer",,,
+,,,,,,
+"ISTEXT",,3,"external_device",1,,
+"ISTEXT",,2,"modem",1,,
+"ISTEXT",,1,"aica",1,,
+"ISTEXT",,0,"gdrom",1,,

systembus_bits.hpp

@@ -131,3 +131,13 @@ constexpr uint32_t holly_g2_if_block_internal_write_buffer(uint32_t reg) { retur
 constexpr uint32_t aica_internal_write_buffer(uint32_t reg) { return (reg >> 0) & 0x1; }
 }
 
+namespace istext {
+constexpr uint32_t external_device = 1 << 3;
+constexpr uint32_t modem = 1 << 2;
+
+constexpr uint32_t aica = 1 << 1;
+
+constexpr uint32_t gdrom = 1 << 0;
+
+}
+