Thanks to John, I managed to get a working 8086 CPU in my system ! it runs reliably apparently at 8 MHz, together with the 4Mb RAM board and on board 27C512 EPROMs.
My system now consists in : - Z80 CPU at 10 MHz (still freezing after the system gets hot... apparently something to do with I/O's, I will have to play with the wait states (currently 1 on RAM and 2 on IO) and check if I need to add some F chips on the Propeller board I am suspecting - 8086 CPU Board - 4MB RAM fully populated - Propeller board - IDE CF board with CPM 3.0 banked version - Serial IO - Bus terminator board - SMB V2 Strangely, My GQ-4X that has been working flawlessly since months, was unable to burn a second time my 27C512's (I made a mistake when separating the odd/even bytes, and now writes do not work anymore, despite there is 12.5V in the write pin). Hence I downloaded John's 8086 monitor by XMODEM (in two 16K chunks), works perfect (expect for the fact the monitor complains there is no 8259, ah..) Now I have to install CPM86, and certainly will build the DOS Support board soon ! thanks to you all for giving me the opportunity for doing such a great project !! Philippe (below some pictures, the iPhone cameras gets saturated by the front panel LEDs...) <https://lh6.googleusercontent.com/--qVU0EuP9_8/VPNiJeKJiOI/AAAAAAAAAOY/kVsISzXuPjQ/s1600/IMG_0489.JPG> <https://lh3.googleusercontent.com/-9XuiO6Rpefw/VPNiWROGGjI/AAAAAAAAAOg/ucQxmBaf0iQ/s1600/IMG_0490.JPG> -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
