KOYADO.COM

A web site dedicated to preserving my first Heathkit 8 bit computer into the future



H8 Boards


H8 CPU Boards


H8 Memory Boards


TH8-8080A/Z80-64KB-RAM-Board

e H8-512KB-RAM-MMU_V4.0


H8 Network/SDC Boards


TH8-CP/NET-SPI-WIZNET-Board

CP/M-Images

H8 New Storage Boards


H8_Z67-DUAL_IDE


Z67-SDC-SCSI


CP/M-HDOS-Images


H8  Front Panel Board


TH8-FRONT-PANEL-Board


H8 DUAL CPU BACKPLANE


TH8-BACKPLANE


H8 System Support I


H8 System Support I


TH8-System_Support_I


H8 PAM37 LISTING


H8 PAM-37 PANEL MONITOR


H8-Z5-4 Cassette I/O


H8-Z5 4_Serial_console_Cassette IO


H8-H17-VDIP1-FULL-SIZE-BOARD


H8_H17_VDIP1_FLOPPY_CONTROLLER

H19 MANUAL

H19_SERVICE_DATA_MANUAL


H8 DUAL CF STORAGE CONTROLLER


TH8-DUAL_CF_CONTROLLER


HA-8-3 GRAPHICS/SOUND/AD CONTROLLER


THA-8-3_GRAPHICS_SOUND_CONTROLLER


H8 Extender Board for Debug


TH8=Extender-Board


H8 8080A BOARD


TH8_8080A__Board


H8 8080A EEPROM Adapter


TH8_8080A_EEPROM_Board


H8 SEBHC 2023 Chassis


TH8_SEBHC_2023_CHASSIS

H8_LED_CONTROLLER

H8 TRIONYX BOARDS


TC-H8 STORAGE CONTROLLER


H89 Boards


H89 Serial-USB Controller


TH89_Serial_USB_CONTROLLER


H8 Chassis CAD Files


TH8_Chassis_CAD_Files


H9 Terminal PROMS

444-10

444-11

444-12