IDE interface for the ETH Lilith

[jdreesen]

After far too long I finally finished my interface for IDE disks on the ETH Lilith.
This interface replaces the DSK PCB, which contains a copy of the WD1001 MFM controller and a serial interface, used to access the Apple-II derived floppy disk subsystem.
I use the interface with DOM-disks, however they should work with any IDE disks that support CHS addressing and has at least 6 heads, 32 sectors and 306 cylinders.
The AMD2901 bitslice microcode needed to be updated and has been placed into WSI-57C49 eproms.

The Modula-2 OS has not been touched, which means that the fixed limitations of the OS remain : disks are always exactly 32 sectors, 6 heads & 306 cylinders for a grand total of 15Mb.

This interface does not work for the earlier V1 variant of the Lilith which uses the Honeywell-Bull MD120 cartridge disk.
I do intend to make an upgrade set that enables and update for V1Liliths to V2 variants.

The PCB below show the minimal setup needed to update the disk. Serial interface to the floppy subsystem has not been mounted.



Not that there will be many takers but I do have some leftover PCB's !

Jos

 

[MrImprovement]

Is there a reproduction Lilith, that can be built? Or is this only for the existing Liliths that are still around?

 

[jdreesen]

Is there a reproduction Lilith, that can be built? Or is this only for the existing Liliths that are still around?

This IDE interface is for surviving MFM-disk equipped Liliths. A reproduction Lilith is a target of mine, but at leasr a year away. For the moment you will have to contend yourself with the Emulith emulator. That also runs on a Raspberry Pi 400 if you'd prefer a standalone solution.

 

[jdreesen]

And another step : a reproduction / redesigned memory board for the later version of the Lilith. I have boards left...