On the Alpha DP264 machine, the Cirrus VGA is I/O mapped
in the 3C0H-3CFH range, thus I/O base used by the parallel
device clashes, and since a4cb773928e the VGA is not
working:
(qemu) info mtree
address-space: memory
0000000000000000-ffffffffffffffff (prio 0, i/o): system
00000801fc000000-00000801fdffffff (prio 0, i/o): pci0-io
...
00000801fc0003b4-00000801fc0003b5 (prio 0, i/o): vga
00000801fc0003ba-00000801fc0003ba (prio 0, i/o): vga
00000801fc0003bc-00000801fc0003c3 (prio 0, i/o): parallel
^^^ ^^^^^^^^
00000801fc0003c0-00000801fc0003cf (prio 0, i/o): vga
^^^
00000801fc0003d4-00000801fc0003d5 (prio 0, i/o): vga
00000801fc0003da-00000801fc0003da (prio 0, i/o): vga
...
As there is no particular reason to use this base address
(introduced in 7bea0dd434e), change to 378H which is the
default on PC machines.
Reported-by: Emilio G. Cota <c...@braap.org>
Suggested-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
RFC: http://lists.nongnu.org/archive/html/qemu-devel/2018-06/msg04011.html
hw/isa/smc37c669-superio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/isa/smc37c669-superio.c b/hw/isa/smc37c669-superio.c
index aa233c6967..64466a9373 100644
--- a/hw/isa/smc37c669-superio.c
+++ b/hw/isa/smc37c669-superio.c
@@ -37,7 +37,7 @@ static bool is_parallel_enabled(ISASuperIODevice *sio,
uint8_t index)
static uint16_t get_parallel_iobase(ISASuperIODevice *sio, uint8_t index)
{
- return 0x3bc;
+ return 0x378;
}
static unsigned int get_parallel_irq(ISASuperIODevice *sio, uint8_t index)
--
2.17.1
