Junkbox CP/M system?

It was late wne I posted so here is something more useful and certainly there has to be something for everyone. If all else fails, I've made more than a few "one off" z80 systems using "junkbox" parts. To run CP/M you don't need a lot but the minimal and useful complete system are not far apart. Z80: Whatever you have! RAM: 48-64k of ram 48k will be enough to run a lot of software, but 64k is only 2 61256s (a 32kx8 SRAM). CP/M will run in 32k but limited application software will fit. The only requirement is ram starts at 0000h and be contigious for at least 20K(minimum) after boot. ROM: anything from 2k up, needed to "boot" the system. desireable to be able to disable it from the memory map. Serial port for a terminal (can be bitbash software to a single bit port) Some mass storage IDE, CF, Rom as a READonly DISK, Also ram can be made to look like disk and if all else a floppy controller and drive. Of all those IDE is the easiest and floppy is likely the more complex. Several desirable things but not required: Serial at least two serial ports (one SIO or DART has two). Conter timer either z80 CTC or common 8253 to provide both a baud clock for serial and a free counter timer for whatever. Parallel interface (IBM/centronics compatable) simple but allows for printers like Epson or HP4L. Parallel port using 8255 PPI, 24 IO lines software configurable, great for programmer or other projects that must be controlled. A video chip like 6845 for a self contained display system Keyboard interface that can accept XT or PS2 keyboard. Paged ram or rom for extra workspace. SITES----------------> Several items at this site worth looking at. http://www.retroleum.co.uk/z80-ideinterface.html Definate go to site for Z80 info: http://www.z80.info/ There are other sites from that link worth a trip, many are in German and have english translation, some don't, I've found them useful. The list would not be complete without Gaby's fine work: http://www.gaby.de/ecpmlink.htm Allison