osiweb.org

Try some generic trouble shooting ! You will find ccts on OSIweb.org

Dont forget : viewtopic.php?f=3&t=180

Welcome Steve from a big HexDOS fan !

Grant, while you are in the "zone" with these PCBs would you be interested in doing a 620 board ??
And how is the color going?
Mike

Looking good Bill. I had a number of additional boards on my RevB SII driving the DD line and remember cutting a few of those numerous grounds for other signals, VCC and others. I will check those out as it may be useful to make some of those grounds an optional link to another pad and an easy track...

1.2 MB 5.25" drive should look just like an 8" floppy, if properly configured. I can confirm this works fine. In fact, the maintainer of the HxC emulator indicated that the emulator should be able to handle the OSI format. Hi, Last week .... "I am currently designing another emulator working at the...

Ooops. Missed that. Thanks I cant match your board development speed Grant. Your D-13 looks pretty much like the paddle board I have been labouring over. Will check that HexDOS article. Ill PM you and we can compare notes. I hope to have a proto pcb done next week. Thanks for the netlist offer. Wow....

Where did you find a 630 schematic ?

Ill send you HexDOS for RevD shortly.
Mike

FDC uses $C000-$C004 PIA and $C010,11 ACIA, not sure if fully decoded. Spotted your OE on Exp pin3 , I guess other addons would supply their own DD gating as per 610 and same could be done for sound etc. Is 32K sufficient to overcome your OM errors for your arrays ? Maybe only 65U and DMS require 40...

Thanks to Tezza I now have a Superkit with 502,540B and 542B external keyboard.

Is there a documented update to colour for the 540B ??
Mike