OpenE2K/qemu-e2k
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simulate a null modem cable

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1808 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2006-04-12 20:42:42 +00:00
parent f331110f35
commit 3e749fe1f7
1 changed files with 3 additions and 2 deletions
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5
hw/serial.c
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@ -78,7 +78,7 @@ struct SerialState {
uint8_t lcr; uint8_t lcr;
uint8_t mcr; uint8_t mcr;
uint8_t lsr; /* read only */ uint8_t lsr; /* read only */
uint8_t msr; uint8_t msr; /* read only */
uint8_t scr; uint8_t scr;
/* NOTE: this hidden state is necessary for tx irq generation as /* NOTE: this hidden state is necessary for tx irq generation as
it can be reset while reading iir */ it can be reset while reading iir */
@ -200,7 +200,6 @@ static void serial_ioport_write(void *opaque, uint32_t addr, uint32_t val)
case 5: case 5:
break; break;
case 6: case 6:
s->msr = val;
break; break;
case 7: case 7:
s->scr = val; s->scr = val;
@ -356,6 +355,7 @@ SerialState *serial_init(SetIRQFunc *set_irq, void *opaque,
s->irq = irq; s->irq = irq;
s->lsr = UART_LSR_TEMT | UART_LSR_THRE; s->lsr = UART_LSR_TEMT | UART_LSR_THRE;
s->iir = UART_IIR_NO_INT; s->iir = UART_IIR_NO_INT;
s->msr = UART_MSR_DCD | UART_MSR_DSR | UART_MSR_CTS;
register_savevm("serial", base, 1, serial_save, serial_load, s); register_savevm("serial", base, 1, serial_save, serial_load, s);
@ -440,6 +440,7 @@ SerialState *serial_mm_init (SetIRQFunc *set_irq, void *opaque,
s->irq = irq; s->irq = irq;
s->lsr = UART_LSR_TEMT | UART_LSR_THRE; s->lsr = UART_LSR_TEMT | UART_LSR_THRE;
s->iir = UART_IIR_NO_INT; s->iir = UART_IIR_NO_INT;
s->msr = UART_MSR_DCD | UART_MSR_DSR | UART_MSR_CTS;
s->base = base; s->base = base;
s->it_shift = it_shift; s->it_shift = it_shift;