valter/dosbox-staging
1
0
Fork 0
Code Releases Activity

disable forced exit on DMA segment wrapping

Browse source 
Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3641
This commit is contained in:
Sebastian Strohhäcker 2010-09-26 14:16:40 +00:00
parent 4654193d3a
commit 03190a56be
1 changed files with 6 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
src/hardware/dma.cpp
View file

@ -48,7 +48,9 @@ static void DMA_BlockRead(PhysPt spage,PhysPt offset,void * data,Bitu size,Bit8u
offset <<= dma16;
Bit32u dma_wrap = ((0xffff<<dma16)+dma16) | dma_wrapping;
for ( ; size ; size--, offset++) {
if (offset>(dma_wrapping<<dma16)) E_Exit("DMA segbound wrapping (read)");
if (offset>(dma_wrapping<<dma16)) {
LOG_MSG("DMA segbound wrapping (read): %x:%x size %x [%x] wrap %x",spage,offset,size,dma16,dma_wrapping);
}
offset &= dma_wrap;
Bitu page = highpart_addr_page+(offset >> 12);
/* care for EMS pageframe etc. */
@ -67,7 +69,9 @@ static void DMA_BlockWrite(PhysPt spage,PhysPt offset,void * data,Bitu size,Bit8
offset <<= dma16;
Bit32u dma_wrap = ((0xffff<<dma16)+dma16) | dma_wrapping;
for ( ; size ; size--, offset++) {
if (offset>(dma_wrapping<<dma16)) E_Exit("DMA segbound wrapping (write)");
if (offset>(dma_wrapping<<dma16)) {
LOG_MSG("DMA segbound wrapping (write): %x:%x size %x [%x] wrap %x",spage,offset,size,dma16,dma_wrapping);
}
offset &= dma_wrap;
Bitu page = highpart_addr_page+(offset >> 12);
/* care for EMS pageframe etc. */