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ne2000 reset fix - start/stop registers read access (aka OS/2 Warp V4 fix) (lukewarm) 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1422 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-04-28 19:45:10 +00:00
parent 98ff7d30f2
commit a343df1659
1 changed files with 11 additions and 2 deletions
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13
hw/ne2000.c
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@ -61,6 +61,9 @@
#define EN1_CURPAG 0x17
#define EN1_MULT 0x18
#define EN2_STARTPG 0x21 /* Starting page of ring bfr RD */
#define EN2_STOPPG 0x22 /* Ending page +1 of ring bfr RD */
/* Register accessed at EN_CMD, the 8390 base addr. */
#define E8390_STOP 0x01 /* Stop and reset the chip */
#define E8390_START 0x02 /* Start the chip, clear reset */
@ -150,7 +153,7 @@ static void ne2000_reset(NE2000State *s)
static void ne2000_update_irq(NE2000State *s)
{
int isr;
isr = s->isr & s->imr;
isr = (s->isr & s->imr) & 0x7f;
#if defined(DEBUG_NE2000)
printf("NE2000: Set IRQ line %d to %d (%02x %02x)\n",
s->irq, isr ? 1 : 0, s->isr, s->imr);
@ -255,7 +258,7 @@ static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val)
if (addr == E8390_CMD) {
/* control register */
s->cmd = val;
if (val & E8390_START) {
if (!(val & E8390_STOP)) { /* START bit makes no sense on RTL8029... */
s->isr &= ~ENISR_RESET;
/* test specific case: zero length transfert */
if ((val & (E8390_RREAD | E8390_RWRITE)) &&
@ -376,6 +379,12 @@ static uint32_t ne2000_ioport_read(void *opaque, uint32_t addr)
case EN0_RSR:
ret = s->rsr;
break;
case EN2_STARTPG:
ret = s->start >> 8;
break;
case EN2_STOPPG:
ret = s->stop >> 8;
break;
default:
ret = 0x00;
break;