From 86feb28064fea017b941d7d2f41b524eff3095d7 Mon Sep 17 00:00:00 2001
From: RichardG867 <richardg867@gmail.com>
Date: Thu, 22 Oct 2020 17:45:31 -0300
Subject: [PATCH] Add FDC DMA remapping on VT82C686 Super I/O

---
 src/floppy/fdc.c        | 7 +++++++
 src/include/86box/fdc.h | 1 +
 src/sio/sio_vt82c686.c  | 1 +
 3 files changed, 9 insertions(+)

diff --git a/src/floppy/fdc.c b/src/floppy/fdc.c
index fc5f522ac..39296c406 100644
--- a/src/floppy/fdc.c
+++ b/src/floppy/fdc.c
@@ -2160,6 +2160,13 @@ fdc_set_irq(fdc_t *fdc, int irq)
 }
 
 
+void
+fdc_set_dma_ch(fdc_t *fdc, int dma_ch)
+{
+    fdc->dma_ch = dma_ch;
+}
+
+
 void
 fdc_set_base(fdc_t *fdc, int base)
 {
diff --git a/src/include/86box/fdc.h b/src/include/86box/fdc.h
index abca81ab0..68d4ea0ce 100644
--- a/src/include/86box/fdc.h
+++ b/src/include/86box/fdc.h
@@ -155,6 +155,7 @@ extern int	fdc_is_verify(fdc_t *fdc);
 extern void	fdc_overrun(fdc_t *fdc);
 extern void	fdc_set_base(fdc_t *fdc, int base);
 extern void	fdc_set_irq(fdc_t *fdc, int irq);
+extern void	fdc_set_dma_ch(fdc_t *fdc, int dma_ch);
 extern int	fdc_getdata(fdc_t *fdc, int last);
 extern int	fdc_data(fdc_t *fdc, uint8_t data);
 
diff --git a/src/sio/sio_vt82c686.c b/src/sio/sio_vt82c686.c
index 235dfbd32..932e79cb1 100644
--- a/src/sio/sio_vt82c686.c
+++ b/src/sio/sio_vt82c686.c
@@ -62,6 +62,7 @@ vt82c686_fdc_handler(vt82c686_t *dev)
     if (dev->regs[0x02] & 0x10)
 	fdc_set_base(dev->fdc, io_base);
 
+    fdc_set_dma_ch(dev->fdc, dev->fdc_dma);
     fdc_set_irq(dev->fdc, dev->fdc_irq);
 }