Fixed USB EHCI issue reported in discussion #727.

vruppert · vruppert · commit a135ce0d1e9d · 2026-02-03T16:35:07.000+01:00
diff --git a/bochs/iodev/usb/usb_ehci.cc b/bochs/iodev/usb/usb_ehci.cc
@@ -980,7 +980,7 @@ bool bx_usb_ehci_c::write_handler(bx_phy_address addr, unsigned len, void *data,
           }
           break;
         case 0x04:
-          BX_EHCI_THIS hub.op_regs.UsbSts.inti ^= (value & USBINTR_MASK);
+          BX_EHCI_THIS hub.op_regs.UsbSts.inti &= ~(value & USBINTR_MASK);
           BX_EHCI_THIS update_irq();
           break;
         case 0x08:

Original file line number	Diff line number	Diff line change
`@@ -980,7 +980,7 @@ bool bx_usb_ehci_c::write_handler(bx_phy_address addr, unsigned len, void *data,`
`980`	`980`	`}`
`981`	`981`	`break;`
`982`	`982`	`case 0x04:`
`983`		`- BX_EHCI_THIS hub.op_regs.UsbSts.inti ^= (value & USBINTR_MASK);`
	`983`	`+ BX_EHCI_THIS hub.op_regs.UsbSts.inti &= ~(value & USBINTR_MASK);`
`984`	`984`	`BX_EHCI_THIS update_irq();`
`985`	`985`	`break;`
`986`	`986`	`case 0x08:`