Kres Engineering
Location: Irvine, CA
H/Z89 Hardware
EXP-700 Expansion - 7 slots, $395
DSM-240 2/4 MHz speedup modules for the H89, $79.95
Color Graphics - 192x256 pixels, 15 colors, 3D sprites, RGB and composite outputs
Music Board - 4 part harmony in stereo $125
PPT-330 Three-port parallel I/O board
H/Z89 Accessories
KMR-100 - replacement monitor ROM
RBP-200 Backplace - replacement rear panel with 20 openings $35
SCF-100 Fan - supplemental fan helps keep it cool $49.95
Power Supply - 5 volts at 10 amps - slips right in
Prototyping Cards - for left, right and ambi-bus $39.95
Joysticks - spring centering or floating $69.96
Software Products
wide selection - for business and personal use
Personnel
Co-founder: Kenneth Smith
Dates: 1981 - 1997 (supporting Heath products) through 2018 (as consulting engineers)
Current Status: As of 2018, company is closing
