Heathkit/Zenith H/Z89-90

This is my Heath/Zenith Z-90 computer with 64K of memory, I have CP/M 2.2.04 and HDOS 2.0 for it. The unit also includes Heathkit's H/Z-89-37 double-density disk controller board which will control 5 1/4" and 8" disks. It also has the H/Z-89-11 multi-function I/O card.

Internal H/Z-90 computer and video boards.

16K memory board.

Double density 5-1/4" disk controller board.

H17 single density controller board.

Multi-function I/O board.

Video controller board.

Terminal logic board.

CPU board.

FDC 8" & 5 1/4" floppy disk controller.

FDC backside.

Magnolia 8" & 5 1/4" floppy disk controller.

Magnolia backside.

Clock board.

Clock board backside.

H-77A External floppy drive system

H89 / Z90 Catalog specifications.

1980 catalog description.

1980 catalog description page 2.

1981 catalog description page 1

1981 catalog description page 2.

1981 external disk drive accessory and a table of options.

1981 high speed dot matrix printer H25.

1981 catalog of the assembled H89 and Z90 with the externat drive option.

1981 catalog of the Z67 8" drive and winchester hard disk option.

	REMark article on adding dual disks to the H/Z89 & 90 February 1986 1.6 meg PDF file.
	REMark 12 part article on adding a hard disk to the H/Z89 & 90, 38.9 meg PDF file.
	REMark article on adding a 3.5" drive to the H/Z89 & 90, 2.2 meg PDF file.
	H89/90 Manuals