From 99972307dc52d0b8173ee869376a9be71fcce6b2 Mon Sep 17 00:00:00 2001
From: joevt <joevt@shaw.ca>
Date: Sat, 4 May 2024 22:16:15 -0700
Subject: [PATCH] platinum: Implement FB_TEST read/write.

---
 devices/memctrl/platinum.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/devices/memctrl/platinum.cpp b/devices/memctrl/platinum.cpp
index 6e02145..b127c35 100644
--- a/devices/memctrl/platinum.cpp
+++ b/devices/memctrl/platinum.cpp
@@ -145,6 +145,9 @@ uint32_t PlatinumCtrl::read(uint32_t rgn_start, uint32_t offset, int size) {
     case PlatinumReg::MON_ID_SENSE:
         value = (this->mon_sense ^ 7);
         break;
+    case PlatinumReg::FB_TEST:
+        value = this->fb_test;
+        break;
     case PlatinumReg::SWATCH_CONFIG:
         value = this->swatch_config;
         break;
@@ -296,6 +299,11 @@ void PlatinumCtrl::write(uint32_t rgn_start, uint32_t offset, uint32_t value, in
         }
 
         break;
+    case PlatinumReg::FB_TEST:
+        this->fb_test =
+            (this->fb_test & ~(SENSE_LINE_OUTPUT_DATA | SYNCS_OUTPUT_ENABLE | FORCED_SYNC_LEVELS)) |
+            (value         &  (SENSE_LINE_OUTPUT_DATA | SYNCS_OUTPUT_ENABLE | FORCED_SYNC_LEVELS));
+        break;
     case PlatinumReg::VRAM_REFRESH:
         this->vram_refresh = value;
         break;