Re: [N8VEM-S100:2614] Show and Tell - New user S100 system up & running (well sorta !)

Hi John,

Thanks for the feedback,

Yes, I was kind of thinking it was more likely to be in the propeller code, I was just wondering if anyone else out there had noticed the same thing.

I'll take a look at it at some stage but for the moment I want to get the system booted up to CP/M 3, I am currently working my way through getting the IDE controller to see a hard drive/CF card but I'll keep that for another forum post.

I've used FPE before, excellent results but can be a little expensive, will probably fabricate the case back and card frame myself and only have the front panel made professionally

regards

David Fry

On Monday, March 3, 2014 6:09:40 PM UTC, monahanz wrote:

Absolutely spectacular layout David. Beautiful, well done!

Don’t have an explanation for the disappearing cursor in the Master.Z80 code, however the problem may reside in the Propeller serial ROM software. It’s been a long time since I was there, but take a look and see if anything is not quite right. 24 or 25 lines/screen etc.

BTW, you may want to try and get/build a card cage with card guides for the boards. I find that over time the pins get weakened in the connectors if they are not exactly vertical. This can cause really frustrating reliability problems. Is a continuous problem with the extender board. I change my connector every year – but then again I probably pop cards in/out 1000 times a year!

John

From: n8ve...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of David Fry
Sent: Monday, March 3, 2014 5:58 AM
To: n8ve...@googlegroups.com
Subject: [N8VEM-S100:2614] Show and Tell - New user S100 system up & running (well sorta !)

Hi all,

8 months after my first contact/enquiry to John Monahan regarding building a S100 computer I now have the hardware up and running as far as the Z80 monitor.

The boards currently build and fitted are:-

S100 V2 Z80 CPU card (running at 6mhz at the moment)

S100 V1 RAM&ROM card

S100 V2 IDE Interface card

S100 V1 Console I/O card

S100 V2 Bus extender card (just for the reset button)

The main power supply rails are switch mode (+8v, +16v, -16v) with secondary linear regulators (+5v, +12v) to power the onboard hard disk/floppy drive.

The outer case metalwork (extruded sides & aluminium base) was purchased from http://www.modushop.biz/ecommerce/index_l2.php

it's essentially case metalwork for audio/hifi projects but I liked the idea of sliding the power supply modules & disk drives into the 'T' slotted sides and it allows me to change my mind on drives etc... over time.

The 10 slot active terminated backplane came from Herb Johnson (Retrotechnology.com)

I have uploaded a couple of pictures to the N8VEM workspace to encourage others who are still working on their first S100 system

http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder&param=David%20Fry

I'd like to thank both John and Andrew for the hours of fun so far in putting this system together, i'm sure it's not all going to be plain sailing though which brings me to my first question.

I have noticed in the Z80 monitor (v5.02) that once the screen is filled with characters and starts to scroll the cursor prompt disappears !!, the monitor still responds to commands though and all functionality otherwise seems fine. Can anyone else replicate/confirm this, it's not a biggie but thought I would mention it.

Now I'm off to try and burn the IDE diagnostic test utility onto an EEPROM to check out the IDE board before working out how to get CP/M 3 up and running.

regards and happy soldering

David Fry

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