From: Ben Gras <ben@minix3.org>
Date: Mon, 26 Feb 2007 11:52:04 +0000 (+0000)
Subject: explicitly mask byte i/o values to bytes.
X-Git-Tag: v3.1.3~54
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zlib_tech.html?a=commitdiff_plain;h=84b77d5bfd54b5aa80c0fd8cce81dd344124cef5;p=minix.git

explicitly mask byte i/o values to bytes.
---

diff --git a/drivers/sb16/sb16_dsp.c b/drivers/sb16/sb16_dsp.c
index 605a8efdd..b05be18c7 100644
--- a/drivers/sb16/sb16_dsp.c
+++ b/drivers/sb16/sb16_dsp.c
@@ -584,11 +584,11 @@ int count;
 		/* set DMA mode */
 		pv_set(pvb[2], DMA8_MODE, (DmaMode == DEV_WRITE_S ? DMA8_AUTO_PLAY : DMA8_AUTO_REC)); 
 
-		pv_set(pvb[3], DMA8_ADDR, address >>  0);        /* Low_byte of address */
-		pv_set(pvb[4], DMA8_ADDR, address >>  8);        /* High byte of address */
-		pv_set(pvb[5], DMA8_PAGE, address >> 16);        /* 64K page number */
-		pv_set(pvb[6], DMA8_COUNT, count >> 0);          /* Low byte of count */
-		pv_set(pvb[7], DMA8_COUNT, count >> 8);          /* High byte of count */
+		pv_set(pvb[3], DMA8_ADDR, (address >>  0) & 0xff);        /* Low_byte of address */
+		pv_set(pvb[4], DMA8_ADDR, (address >>  8) & 0xff);        /* High byte of address */
+		pv_set(pvb[5], DMA8_PAGE, (address >> 16) & 0xff);        /* 64K page number */
+		pv_set(pvb[6], DMA8_COUNT, (count >> 0) & 0xff);          /* Low byte of count */
+		pv_set(pvb[7], DMA8_COUNT, (count >> 8) & 0xff);          /* High byte of count */
 		pv_set(pvb[8], DMA8_MASK, SB_DMA_8);	       /* Enable DMA channel */
 
 		sys_voutb(pvb, 9);
@@ -605,8 +605,8 @@ int count;
 		pv_set(pvb[3], DMA16_ADDR, (address >> 1) & 0xFF);  /* Low_byte of address */
 		pv_set(pvb[4], DMA16_ADDR, (address >> 9) & 0xFF);  /* High byte of address */
 		pv_set(pvb[5], DMA16_PAGE, (address >> 16) & 0xFE); /* 128K page number */
-		pv_set(pvb[6], DMA16_COUNT, count >> 1);            /* Low byte of count */
-		pv_set(pvb[7], DMA16_COUNT, count >> 9);            /* High byte of count */
+		pv_set(pvb[6], DMA16_COUNT, (count >> 1) & 0xff);            /* Low byte of count */
+		pv_set(pvb[7], DMA16_COUNT, (count >> 9) & 0xff);            /* High byte of count */
 		pv_set(pvb[8], DMA16_MASK, SB_DMA_16 & 3);          /* Enable DMA channel */
 
 		sys_voutb(pvb, 9);