I'm just testing VPC in a XP Home enviroment. I need to run some old MS-DOS 6.22 applications for a special communication hardware (CAN) at the LPT. The software uses the ports and the IRQ of the LPT. VPC LPT port access works fine, but no interrupt is dedected. Booting pure MS-DOS and using this software or running windows specific software for this hardware shows, that the ports and the IRQ works fine (LPT = standard bidirectional, LPT as plug & play or legacy, use all interrupts of the connection). I didn't found any comment about the LPT IRQ in this forum or the documentation, but the information, that a parallel port ZIP drive will work. I think, the ZIP guest software will also use the interrupt. So the question is, what else can I do, is there a problem of using XP Home or is the use of LPT IRQ no part of VPC? Thanks JUB