All posts by Craig Southeren

Gotek Disk Images

Here are the disk images I use for some of my vintage computers.

These are intended for use with the excellent HxC2001 firmware. The HFE format should work with the standard Gotek firmwre but I have not tried that personally.

Microbee – double sided 40 track

Kaypro IV – double sided 40 track

Kaypro II – single sided 40 track. Note that the Gotek will need to be configured to ignore the side select signal.

Buying a Microbee

I recently purchased a large cache of Microbee computers with the intent of refurbishing them and reselling to the retro computer community.

I’m working my way through them, and there has been a lot of interest from people who are eager to buy.

Right now, the Microbee base units are $400AUD, and monitors are $AUD200. This does not include post and packaging, if required.

NOTE: parts have arrived from China and I am slowly working through upgrading and testing disk systems. There are a small number of ROM systems still available.

NOTE: all of the remaining systems have cases engraved with “Lisarow High School”. I can send pictures of the cases before you agree to purchase.

The price may change depending on the number of parts I need to make them work.

If you still interested, here what you need to know:

  • The systems are tested and working. DRAM has passed a memory test, video is stable, and floppy controllers (if fitted) are aligned using a Gotek floppy drive emulator.
  • The keyswitches will probably need cleaning, so not all keys may work correctly. You will need to clean then (excellent instructions from Ewan Wordsworth of Microbee Technology can be found here), or you can buy a full keyboard replacement kit from www.microbeetechnology.com.au
  • The systems do NOT include a cable or power supply. These can be purchased from www.microbeetechnology.com.au
  • The 128k Microbee systems do NOT include a floppy drive, unless otherwise stated. I do have a few 3.5″ drives that could be used to make up a Computer-In-A-Book, but I’ve not had time to refurbish them so far.
  • Monitors are not included, unless otherwise stated. I do have a few amber Microbee-branded monitors available. Once they are gone, they are gone! Monitors have all been sold!
  • Cases will be wiped clean and any writing or non-original stickers will be removed. The cases and keyswitches may be yellowed from age or sun exposure. Some cases may be engraved by the orignal owner (apparently many of these systems came from “Lisarow High School”).
  • If the case is engraved, I will confirm with you before payment is accepted.
  • There are a few ROM based systems available. If you want one, please contact me at craig@postincrement.com for exact details on availability.
    Note that ROM systems cannot be upgraded to a disk system without a replacement coreboard and maybe some baseboards mods. I may have some floppy coreboards available at a later date.
A “hive” of Microbees?
A 32k ROM Microbee showing the BASIC prompt

RIFA adventures

I need some 4700pf/300v RIFA caps for Kaypro power supplies, so I ordered replacements from element14.

However, I’m not sure these parts are suitable as they are somewhat smaller than I was expecting. What’s the consensus of the hive mind – can I use them?

UPDATE: consensus was that they are OK to use, provided they fit physically!

Disk drive working

Kaypro #1 wouldn’t boot from a Gotek, but Kaypro #2 is up and running!

Update: the problem with Kaypro #1 was the WD9216 data separator. Swapped this chip with one from another system and disk reads started working.