H8 Collection

This is the heart of the h8 system. It contains:

• Power supply
• Board "backplane"
• Front Panel - both display and keyboard

This unit is in great shape. I haven't spent much time touching up the paint, so there is the standard wear on the sides, back and front. Please see the pictures to get an accurate view of the machine. Here are some important notes about this machine:

• The front panel board connector was once wired for the 3MHz mod, but has been reverted. It could easily be modified again if desired.
• The backplane has had one fix, where a board was previously pushed in too hard.

I've had the machine fully populated with cards at times, so all backplane connectors work. The power-supply was able to keep up as well.

All keys work just great, and all LEDs work well, with good brightness.

The documentation for this unit is shown to the right. It's in great shape, too.

This is your standard H8 floppy drive, and it works well.

However, at least one of the drives is not original. In the picture to the left, drive #1 is a NOS (new-old-stock) floppy drive that I installed, replacing the old drive that was non-functional. I'm including the old non-functional drive too. I suppose it can be fixed. I just didn't want to take the time to do it.

Besides replacing the drive I've done no work on this unit.

Note - the drives are currently dip-switch programmed to #0 and #1 as shown on the sticker on the drive. You can see the dip-switches in one of the pictures to the right.

This drive isn't useful without the floppy board, which can be seen in the Boards tab.

This is an incredibly clean H19, both inside and outside, that works very well. The display is bright and rock solid - after a bit of warm-up time. During the first few minutes, you'll see a jump from time to time. You have to be watching for it, though. After a few minutes, the jump goes away.

All keys work, and all functions work. Currently, the H19 is internally set at 9600 baud - although I've had it at 1200 before so that it would match the single-port serial board. But you can easily switch it to another speed, or change the speed through an ESC sequence (as described in the manual). For example: ESC r L switches to 9600 baud.

There was one problem with the H19 that I fixed. The original power switch had become un-responsive, so I installed a new one. That switch is still in the H19.

However, since that time I have repaired the original switch, which now works great. But I haven't re-installed it. The switch is included in the collection.