should i check enhanced keyboard driver vmware install

#Should i check enhanced keyboard driver vmware install code#
#Should i check enhanced keyboard driver vmware install ps2#

The way to know if the byte in the PS2s Output Buffer is from the keyboard or the mouse is simply because the keyboard and mouse each fire a different IRQ, though both use the same Output Buffer. It all depends on how you look at it, from the IRQ point of view or the kernel thread (task) point of view. Note: some think the head and tail should be swapped.

#Should i check enhanced keyboard driver vmware install code#

This way the IRQ does so little that it uses only 10 to 30 cycles of the CPU (not counting time to acknowledge interrupt), and all of the work is done in the a kernel thread, where preemptive thread (task) switching is okay and does not hurt performance any.Ĭode: ( pseudo code ) ( using a circular buffer ) ( NEXT retrieves the next position in the circular buffer ) ( i.e.: dont want the head to write on the tail ) kernelps2irq: byte inp(outputbuffer) if (NEXT(head) tail) head NEXT(head) keyboardrawbufferhead byte acknowledge interrupt done. Then, I have a thread (or task) that monitors this buffer and when enough bytes are found to create a scan code, it retrieves them, creates the scan code, and adds it to the scan code buffer (where ironically, another thread (or task) monitors it).

#Should i check enhanced keyboard driver vmware install ps2#

In my book, Input and Output Devices, I show that your PS2 IRQ should simply retrieve the byte from the Output Register and store it in a buffer, acknowledge the interrupt, and (interrupt) return. My IRQ checks general key, was shift released or not, caps lock, set up the keyboard lights if required, alt key, ctrl key, numpad, etc. This improves general performance and stability, especially with multitasking.Īny ideas to somehow speed up keyboard lag without optimizing my IRQ.Īny ideas to somehow speed up keyboard lag without optimizing my IRQ The interrupt part of a keyboard driver should be very small. Is it because I bundled my keyboard IRQ too much And did anyone had similar problems with VMware. Enhanced Keyboard Vmware Meaning Driver So NowĪnd yes, I updated my keyboard driver so now it uses IRQs to catch keys. I tried disabling their enhanced keyboard but results are same. The keyboard is fast enough on other emulators (VirtualBox, PCem, Bochs) but not on VmWare. This means that every time you visit this website you will need to enable or disable cookies again. Enhanced Keyboard Vmware Meaning Driver So NowĬookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.