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Replica 1 extensions

Well I have just finished building all the extra bits and pieces I use with my Replica 1 onto a single board. It gives me regulated power with a switch and LED (I have a pre-SE model), sound (using the approach described here http://cowgod.org/replica1/replica1-sound.html), fast serial (as described...
by Kallikak
Aug Mon 10, 2009 10:52 pm
 
Forum: Creation Room
Topic: Replica 1 extensions
Replies: 2
Views: 9939

Thanks for the suggestion Vince. I'll try with a 244. When enable is high, is the output stable for address decoding say? (I haven't played with tri-state outputs before.)
by Kallikak
Jun Wed 24, 2009 11:00 pm
 
Forum: Creation Room
Topic: Question on timings
Replies: 2
Views: 8430

Question on timings

I've just tried a little circuit on my Replica 1 using a 74LS377 and some LEDs to test something else I want to build. I tied the 377 enable to /A000 from the Replica 1 expansion - this signal goes low when I write to any Axxx address. Then I simply connect the data bus from the 6502 to the inputs o...
by Kallikak
Jun Tue 23, 2009 6:24 pm
 
Forum: Creation Room
Topic: Question on timings
Replies: 2
Views: 8430

I have again updated the Krusader Toolkit on my web site. Not so significant as the last update, but a few usability related improvements.

Ken
by Kallikak
Jun Thu 18, 2009 11:03 pm
 
Forum: Software
Topic: Significant Krusader Toolkit upgrade available
Replies: 1
Views: 7270

Re: Embedded Replica 1?

Get rid of everything except the I/O port and a way to transfer code. The keyboard is the way to transfer code :-) When I was much younger, I used to spend 4 hours typing in code to a homebrew computer (not of my making) so I could play for 30 minutes and then have to turn the machine off and lose ...
by Kallikak
May Tue 05, 2009 11:11 pm
 
Forum: replica 1 General Discussion
Topic: Low Cost replica 1?
Replies: 20
Views: 46005

I'd prefer no serial port. This is a minimal version and it's easy enough to build a better serial port - and this is a kit after all. I have fast serial port and external ROM and sound etc all hanging off the expansion port on mine.

Ken
by Kallikak
Apr Tue 28, 2009 8:05 pm
 
Forum: replica 1 General Discussion
Topic: Low Cost replica 1?
Replies: 20
Views: 46005

Nice one! Thanks.
by Kallikak
Apr Wed 08, 2009 9:44 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: Steve Ciarcia, Z80 Applications Processor (ZAP) Computer
Replies: 6
Views: 15888

Take out the ROM and RAM chips, and check the corresponding address and data sockets for continuity and shorts.

Ken
by Kallikak
Feb Tue 24, 2009 11:19 pm
 
Forum: Troubleshooting
Topic: No cursor when testing video section after initial assembly
Replies: 7
Views: 20138

Significant Krusader Toolkit upgrade available

I have just put an updated version of the Krusader Toolkit up for download from my Krusader webpage (see my profile for link, or just google Krusader Replica). I have fixed a number of cosmetic bugs, a couple of important functional bugs and filled some gaps. It is probably about 95% complete now. T...
by Kallikak
Dec Mon 29, 2008 8:49 pm
 
Forum: Software
Topic: Significant Krusader Toolkit upgrade available
Replies: 1
Views: 7270

Not personally, but I have a friend who does a lot of work with AVRs, so I am sure he will be able.

Thanks,

Ken
by Kallikak
Oct Tue 28, 2008 4:30 pm
 
Forum: replica 1 General Discussion
Topic: 7" composite LCD on the way
Replies: 26
Views: 59561

Just post it now. :-)

I am very keen to test the improvement.

Ken
by Kallikak
Oct Mon 27, 2008 7:43 pm
 
Forum: replica 1 General Discussion
Topic: 7" composite LCD on the way
Replies: 26
Views: 59561

Sorry for the slow reply - I haven't had a chance to check the forums for a few days. The problem is the MOVE routine moved from version 1.2 to version 1.3. The address you want is now F204. This information can be found in the krusader 1.3 manual on my website.

Ken
by Kallikak
Oct Thu 23, 2008 5:31 am
 
Forum: Software
Topic: Krusader v 1.3 section 8.3 Moving Memory
Replies: 1
Views: 7787

Of course what I'd really recommend is writing it in assembly. Would be quite straightforward since it only involves adding and carry. Just use the same approach, but the speed will be greatly enhanced.
by Kallikak
Sep Fri 26, 2008 1:37 am
 
Forum: Software
Topic: Arbitrary precision integer math in BASIC
Replies: 2
Views: 9849

You would find this thread interesting then.

http://www.brielcomputers.com/phpBB2/vi ... .php?t=327

One thing I'd suggest is to use base 100 in your arrays and convert to print. You could even use base 256 if you're prepared to work a bit harder on the conversion.

Ken
by Kallikak
Sep Fri 26, 2008 1:36 am
 
Forum: Software
Topic: Arbitrary precision integer math in BASIC
Replies: 2
Views: 9849

I got the chance to look at the source, and the target RAM build is not quite right. It's an easy fix to the source, but to save you the trouble, here's the code. 7100: A9 03 85 F8 A9 1D 85 FF A9 6D 85 F9 A2 1B BD 67 7110: 7E 20 EF FF CA D0 F7 CA 9A 20 71 71 D8 A9 00 85 7120: 5B 20 CE 71 A2 0F 86 58...
by Kallikak
Sep Tue 09, 2008 1:22 am
 
Forum: Troubleshooting
Topic: Krusader not starting
Replies: 7
Views: 20632
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