From 54ae724b5a71c8c1935037373c7a2bc6600d4649 Mon Sep 17 00:00:00 2001
From: meepingsnesroms <guicrith@gmail.com>
Date: Sun, 29 Apr 2018 14:09:08 -0700
Subject: [PATCH] Add more registers

---
 src/ads7846.c                   |  3 ++-
 src/hardwareRegisters.c         | 28 ++++++++++++++++++++++++++--
 src/hardwareRegistersTiming.c.h |  4 ++--
 unimplementedFeatures.txt       |  1 +
 4 files changed, 31 insertions(+), 5 deletions(-)

diff --git a/src/ads7846.c b/src/ads7846.c
index 9a8261a..04e9602 100644
--- a/src/ads7846.c
+++ b/src/ads7846.c
@@ -43,7 +43,8 @@ void ads7846SendBit(bool bit){
 
          case 0x02:
             //battery
-            value = palmMisc.batteryLevel;
+            //value = palmMisc.batteryLevel;
+            value = 100;
             rangeMax = 100;
             break;
 
diff --git a/src/hardwareRegisters.c b/src/hardwareRegisters.c
index 5529ce8..1c88ceb 100644
--- a/src/hardwareRegisters.c
+++ b/src/hardwareRegisters.c
@@ -101,8 +101,13 @@ static void recalculateCpuSpeed(){
    if(pctlr & 0x80)
       newCpuSpeed *= (double)(pctlr & 0x1F) / 31.0;
 
-   debugLog("New CPU frequency of:%f cycles per second.\n", newCpuSpeed * CRYSTAL_FREQUENCY);
-   debugLog("New CLK32 cycle count of:%f.\n", newCpuSpeed);
+   if(newCpuSpeed != palmCrystalCycles){
+      debugLog("New CPU frequency of:%f cycles per second.\n", newCpuSpeed * CRYSTAL_FREQUENCY);
+      debugLog("New CLK32 cycle count of:%f.\n", newCpuSpeed);
+      if(newCpuSpeed == 0.0)
+         debugLog("CPU turned off with PCTLR.\n");
+   }
+
    palmCrystalCycles = newCpuSpeed;
 }
 
@@ -346,10 +351,22 @@ unsigned int getHwRegister8(unsigned int address){
       case PDDATA:
          return getPortDValue();
 
+      case PEDATA:
+         //read outputs as is and inputs as true, floating pins are high
+         return (registerArrayRead8(PEDATA) & registerArrayRead8(PEDIR)) | ~registerArrayRead8(PEDIR);
+
       case PFDATA:
          //read outputs as is and inputs as true, floating pins are high
          return (registerArrayRead8(PFDATA) & registerArrayRead8(PFDIR)) | ~registerArrayRead8(PFDIR);
 
+      case PGDATA:
+         //read outputs as is and inputs as true, floating pins are high
+         return (registerArrayRead8(PGDATA) & registerArrayRead8(PGDIR)) | ~registerArrayRead8(PGDIR);
+
+      case PJDATA:
+         //read outputs as is and inputs as true, floating pins are high
+         return (registerArrayRead8(PJDATA) & registerArrayRead8(PJDIR)) | ~registerArrayRead8(PJDIR);
+
       case PKDATA:
          return getPortKValue();
 
@@ -365,7 +382,9 @@ unsigned int getHwRegister8(unsigned int address){
       //I/O direction
       case PBDIR:
       case PDDIR:
+      case PEDIR:
       case PFDIR:
+      case PJDIR:
       case PKDIR:
 
       //select between GPIO or special function
@@ -442,6 +461,7 @@ unsigned int getHwRegister16(unsigned int address){
       case RTCCTL:
       case RTCIENR:
       case ILCR:
+      case ICR:
       case SPICONT2:
       case SPIDATA2:
          //simple read, no actions needed
@@ -641,6 +661,10 @@ void setHwRegister16(unsigned int address, unsigned int value){
          //missing bits 6 and 7
          registerArrayWrite16(address, value & 0xFF3F);
          break;
+
+      case RTCCTL:
+         registerArrayWrite16(address, value & 0x000A);
+         break;
          
       case IMR:
          //this is a 32 bit register but Palm OS writes it as 16 bit chunks
diff --git a/src/hardwareRegistersTiming.c.h b/src/hardwareRegistersTiming.c.h
index f36eb8e..58839f8 100644
--- a/src/hardwareRegistersTiming.c.h
+++ b/src/hardwareRegistersTiming.c.h
@@ -198,9 +198,9 @@ static inline void timer12Clk32(){
 static inline void rtcAddSecondClk32(){
    //this function is part of clk32();
 
-   //rtc
+   //RTC
    if(registerArrayRead16(RTCCTL) & 0x0080){
-      //rtc enable bit set
+      //RTC enable bit set
       uint16_t rtcInterruptEvents;
       uint32_t newRtcTime;
       uint32_t oldRtcTime = registerArrayRead32(RTCTIME);
diff --git a/unimplementedFeatures.txt b/unimplementedFeatures.txt
index b04d738..1c68bdd 100644
--- a/unimplementedFeatures.txt
+++ b/unimplementedFeatures.txt
@@ -20,6 +20,7 @@ Port M Infrared shutdown (PMDATA 0x20)
 interrupt control register (ICR), POL5 and edge trigger selects
 ADC7846 temperature sensors
 ADC7846 dock sensor
+some undocumented I/O might be on port e and port j
 
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