Search found 150 matches

by Klyball
Sat May 20, 2017 6:45 pm
Forum: Buy / Sell / Trade
Topic: Boards for sale
Replies: 1
Views: 497

Re: Boards for sale

Just a reminder that I still have some of these left

Cheers
by Klyball
Sat May 20, 2017 4:16 pm
Forum: OSI discussion, thoughts, projects
Topic: OSI Reproduction Boards interest list
Replies: 6
Views: 112

Re: OSI Reproduction Boards interest list

I'm in for a

540B
580
by Klyball
Sun Feb 26, 2017 11:22 pm
Forum: OSI discussion, thoughts, projects
Topic: 560Z Build thread
Replies: 27
Views: 3009

Re: 560Z Build thread

Great Work Glitch,

to save every one having to type it out,Here is the IOT part of the driver asm it has a bit of code i started to handle the memory management,Please feel free to fill in the blanks :)
IOT3400.zip
(2.62 KiB) Downloaded 50 times
by Klyball
Wed Feb 22, 2017 5:57 am
Forum: OSI discussion, thoughts, projects
Topic: 560Z Build thread
Replies: 27
Views: 3009

Re: 560Z Build thread

01.10 Where to from here Grant? 01.20 Do you intend using paper tape I/O 01.30 Z80 ROM - I have a couple of Z80 monitors that could be adapted or recode 65A ? 01.40 6820/1 's, Z80s here but no I6100. Any of the TTL hard to find? Some spares would be handy if they are. 01.50 How about a " Hello Worl...
by Klyball
Tue Feb 21, 2017 9:53 pm
Forum: OSI discussion, thoughts, projects
Topic: 560Z Build thread
Replies: 27
Views: 3009

Re: 560Z Build thread

MK14HAK wrote:Very nice. Do you have any ROM on the Z80 side at present ?
no rom but I have a 64k module so I just load the rom code into ram where needed.
by Klyball
Tue Feb 21, 2017 9:48 pm
Forum: OSI discussion, thoughts, projects
Topic: 560Z Build thread
Replies: 27
Views: 3009

Re: 560Z Build thread

Are you using 6821s in place of the 6820s on the 560Z board, then? I hadn't confirmed that they'd work as replacements -- they usually do, I couldn't see why they wouldn't in this case, but I didn't want to order 100x 6821s just to find out they don't work here! 6821's working no problem I think I ...
by Klyball
Tue Feb 21, 2017 5:12 pm
Forum: OSI discussion, thoughts, projects
Topic: 560Z Build thread
Replies: 27
Views: 3009

Re: 560Z Build thread

I have no drives hooked up I was low on 6821's so I took them out of my interface, i'm using my serial boot file while on the bench, normally I use modified 3.5 1.44 drives instead of my 8 inch beasts that are 220v to save wear and tear on them.
by Klyball
Tue Feb 21, 2017 1:46 am
Forum: OSI discussion, thoughts, projects
Topic: 560Z Build thread
Replies: 27
Views: 3009

Re: 560Z Build thread

Working 560z ,drivers tested and working with 430b for pdp or z-80 terminal Binary loader patched to load pdp papertape images from OSI terminal side. There is no memory mangement in the pdp iot handler so it will need to be microcoded in (i have been trying to wrap my head around it) to use more th...
by Klyball
Sat Feb 18, 2017 1:41 am
Forum: OSI discussion, thoughts, projects
Topic: OSI 502C A custom 502 board design
Replies: 6
Views: 833

Re: OSI 502C A custom 502 board design

I think doing it on the superboard foot print might be the way to go, should have enough room to fit it all in and a 3 or 4 slot back plane for original boards

1 osi superduper board