From 7c47b9c1e7bdfb9cc7fc118f403d743ccb337176 Mon Sep 17 00:00:00 2001
From: Maxim Poliakovski <maximumspatium@googlemail.com>
Date: Wed, 13 Oct 2021 09:06:16 +0200
Subject: [PATCH] amic: implement AMIC2 identification.

---
 devices/amic.cpp | 3 +++
 devices/amic.h   | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/devices/amic.cpp b/devices/amic.cpp
index 34ea2d5..23ef892 100644
--- a/devices/amic.cpp
+++ b/devices/amic.cpp
@@ -91,6 +91,8 @@ uint32_t AMIC::read(uint32_t reg_start, uint32_t offset, int size)
         return this->snd_out_dma->read_stat();
     case AMICReg::Diag_Reg:
         return 0xFFU; // this value allows the machine to boot normally
+    case AMICReg::SCSI_DMA_Ctrl:
+        return this->scsi_dma_cs;
     default:
         LOG_F(WARNING, "Unknown AMIC register read, offset=%x", offset);
     }
@@ -177,6 +179,7 @@ void AMIC::write(uint32_t reg_start, uint32_t offset, uint32_t value, int size)
         break;
     case AMICReg::SCSI_DMA_Ctrl:
         LOG_F(INFO, "AMIC SCSI DMA Ctrl updated, val=%x", value);
+        this->scsi_dma_cs = value;
         break;
     case AMICReg::Enet_DMA_Rcv_Ctrl:
         LOG_F(INFO, "AMIC Ethernet Receive DMA Ctrl updated, val=%x", value);
diff --git a/devices/amic.h b/devices/amic.h
index 62c9180..3156bbe 100644
--- a/devices/amic.h
+++ b/devices/amic.h
@@ -139,6 +139,8 @@ private:
     uint16_t    snd_buf_size = 0; // sound buffer size in bytes
     uint8_t     snd_out_ctrl = 0;
 
+    uint8_t     scsi_dma_cs = 0; // SCSI DMA control/status register value
+
     std::unique_ptr<ViaCuda>        viacuda;
     std::unique_ptr<AwacDevicePdm>  awacs;