This page describes the systems I currently own. Please check back as I will be adding more photos & detail for these items, plus additional hardware I collect.
Note links highlighted in the text below for other info regarding these systems!
Homebuilt S-100’s:
CCS/Cromemco/Godbout
This was my first "home built" system back in 1981. The chassis is an IMSAI, which was built from a kit. These chassis and front panel kits were being sold through W & W Components in Santa Clara CA. The kits were surplus from the days IMSAI was selling off their inventory. I populated this system with a Morrow backplane, Cromemco ZPU, CCS 2422 controller, Cromemco TUART, and a Godbout RAM 17. I also built the CCS and Godbout boards from kits, which I purchased at Anchor Electronics in Santa Clara around 1981 also. It’s still running great with the CP/M 2.2 operating system, two 8” SA860’s, plus two 3.5” 720K floppy drives. Originally I had a 5¼” floppy and an original Shugart SA350 3.5” drive in place of the current 3.5” drives. Using the CCS 2422 controllers may require some modifications. You can find them here CCS-Notes which correct some known problems. I have made these mods to my CCS boards and they work very well.
I modified the CCS BIOS to use the TUART as the console, and the second serial port drives a Diablo 630 Daisy Wheel printer.
Recently I have added a GIDE to the Cromemco ZPU and it is functioning and accessing a Conner 3.5” IDE hard drive. Now I just need to write the BIOS to use the drive for storage on this system!
S-100 System with IMSAI chassis, CCS & Cromemco boards, + 8" Shugart SA860's
Cromemco & CCS
This system uses a Cromemco "System Zero" chassis, and is populated with all CCS boards. The 2810 CPU, the 2422 Controller, and the 2065 64K Ram. It runs CP/M 2.2, and I have modified the BIOS for 80 track double sided 5 ¼ or 3.5” drives. (Photos coming soon)
Compupro
I built this robust system, which has a rack mount custom chassis that houses the power supply for the S-100 Bus, as well as for the Floppy and Hard Disk Drives, plus a 9 slot backplane. It is populated with the following boards;
- CPU 8085/8088 (I also currently use the Macrotec Z80/80286 CPU)
- System Support 1
- Interfacer 4
- Disk 1A Floppy Controller
- Disk 3 Hard Disk Controller
- Ram 22, 256K Static Memory
- Digital Research 128K Static Memory
(click here Compupro-Notes for switch settings)
This system interfaces with two 8” double sided Qume drives, two 5 ¼” Floppy drives, and a Seagate ST-225 20MB hard drive. The system will boot CP/M 2.2, CP/M-86, or Concurrent CP/M all using the same hardware with no need for switch setting changes.
Compupro System in Rack Mount Chassis
Cromemco Cromix System
I have this system loaded into a Compupro 8/16 S-100 chassis. The boards installed are the DPU (Z80 /68000 cpu), STDC HD Controller, 64KZ Floppy Controller, 1024KZ Memory, TUART, and PRI.
I have added a Seagate ST225, and have it loaded with version 31.05 Cromix Plus. The system can also boot CP/M and CDOS.
Other Vintage Computers:
Cromemco System One
Very clean and complete S-100 system with all Cromemco boards. They are the DPU (Z80 /68000 cpu), WDI-II, (2) 256KZ Memory, 16FDC Controller, and a TUART.There is one 5 1/4" floppy and an IMI 10MB Hard Disk. This system can boot CP/M, CDOS, or Cromix. I have Cromix Plus 31.05 loaded on the hard disk and the system is working well.
Altos 586
Mid to late 1980's multiuser Xenix system. has one 5 1/4 floppy and one Q540 hard disk. This system has the added "user" board to convert it to a 986, giving it 4 more serial ports which allows nine total users. I also have the MP/M boot disk for this system which boots up with no problems.
Xerox 820 II
Z80 CP/M 2.2 system with dual 8" SSDD floppys. Also interfaces nicely with the Diablo 630 Daisywhell printer.
Heathkit H89
Kit built all in one Z80 CP/M system with integrated 5 1/4" floppy dirve. This also can serve as a very nice terminal.
Morrow Micro Decision
All in one Z80 CP/M 2.2 system which includes two integrated 5 1/4" floppys, Monitor, and Keyboard.
Other Systems & Hardware:
- P112 with GIDE
This nice little system was built from a kit, and then later I added the GIDE kit to interface the 3.5" IDE drive and the IDE Flash Drive. I have it running at 18 Mhz. I incorporated the system into a surplus metal case with power supply and fan. To be able to transfer files between my S-100 systems easily, I re-assembled the Banked Bios (BP Bios) to work with the 8" floppys. With a small adapter attached to the floppy cable from the P112 the 8" drives work great, and I can read single and double density 8" formats from the CCS and Compupro systems.
P112 with GIDE driving Conner 3.5" HD and Flash as Slave IDE
- Epson HX-20
- Several S-100 cards in various functional and non functional states
