Driver:Heathkit
8-bit Heathkit Computers/Terminals
Heath Company introduced their first digital computers in 1977. This included the H-8, which used the 8-bit 8080 processor, and the H-11, which was compatible with the DEC PDP-11, at a cheaper price. They released the H-89 in 1979, which utilized two Z-80 processors, one for the computer and one for the terminal portion of the system.
Note: This page is WIP / Preliminary Information
H-8 Computer (driver name h8)
The H-8 is currently implemented and supports cassette tape.
H-19 Terminal (driver name h19)
The H-19 Terminal is currently working. As of MAME release 0.258, the prior clones (gp19, super19, ultra19, watz19, ) have been implemented as tlbc slot device for the terminal logic board. The existing methods to select the slot device can be used to select which of these upgrades are active. The "------" option, which means the slot is empty can not be used and still have a functional h19.
Slot Options
- Heath heath
- - This the original terminal logic board, without any upgrades.
- Northwest Digital Systems GP-19 gp19
- - This option adds the Northwest Digital System's GP-19 upgrade board for the H19. It add graphic support and larger screen up to 132 x 50 characters. (note: not fully functional, 50 line mode has problems).
- Super-19 super19
- - This option replaces the program ROM with an upgrade ROM.
- Superset superset
- - This option replaces the program ROM, font ROM, and keyboard ROM with upgrade ones.
- UltraROM ultra19
- - This option replaces the program ROM and keyboard ROM with upgraded options.
- Watzman/HUG ROM watz19
- - This option replaces the program ROM and keyboard ROM with upgraded options.
Key Mapping
There are several keys on the H19 (and H89) that are not on current keyboards. These keys are mapped as follows:
- Break -> Pause
- Off Line -> F12
- Repeat -> Right ALT
- Reset -> F10
- Line Feed -> Right WIN
- Erase -> F6
- Blue -> F7
- Red -> F8
- White -> F9
- Scroll -> F11
H-88 Computer (driver name h88)
This is a version of the H-89 family of computers that supported cassette tape and hard-sectored floppy drives. Currently only the cassette tape is supported.
H-89 Computer (driver name h89)
Only the Z-89-37 soft-sectored controller has been implemented for the H-89. It supports up to 4 floppy disk drives. The default options for the slot devices and BIOS will allow the Z-89-37 to function properly. The tlbc slot device can be changed without impacting the Z-89-37.
Slot Options
The 4 h37:z37_fdc slots are for floppy drives connected to the Z-89-37 controller.
The intr_socket slot is fixed and set by the software to h37.
The remaining slot device is the tlbc, which is identical to the tlbc slot as defined above in the H19 section.
Key Mapping
See Key Mapping above for the H19.
BIOS Options
In order for the H89 to work with the Z-89-37, either one of the MTR-90 ROMs must be used, or the MMS's 84B. Neither MTR-88 nor MTR-89 can be used. MTR-90 (444-142) is the preferred ROM since it improved performance when different drives with different number of tracks (40 vs. 80) are used with the Z-89-37. Note: Dip switch setting shown in the UI for the "[Root:]" can be configured by changing the Machine configuration option "Switch SWw501 Definitions". The selection which best match the BIOS selected for the system should be picked here.
Floppy Disk Options
The File Manager UI can be used to load any of the disk formats supported by MAME for FM/MFM images. IMD and TD0 disk images are available for the H89.
Note: if the disk image is only 40 tracks, and the drive used is 80 tracks, the OS will set the disk to R/O to prevent the attempted writing of a 40 track disk in an 80 track drive.
