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It's a 14 strand ribbon cable, I don't think that is the same as the floppy connector...

You can get these in electronic stores or on-line from Digikey or Jameco...
by fsafstrom
Jul Tue 29, 2008 12:19 pm
 
Forum: Creation Room
Topic: Control panel...
Replies: 12
Views: 32073

And here are the extra inputs...

Want some inputs with that ? The upper and lower Y1 to Y4 goes to the Databus of the 6502. R/W is the Read Write from the 6502. PHI2 is the clock from the 6502. Address Enable is an Active Low enable from an address encoder such as an 74LS138. For example, the $A000-$AFFF, $B000-$BFFF or $C000-$CFFF...
by fsafstrom
Jul Tue 01, 2008 10:19 pm
 
Forum: Creation Room
Topic: And here are the extra inputs...
Replies: 0
Views: 7684

Something like the schema below, but I used the 74LS02 (NOR) in stead... I was thinking of adding another three 373s to get 32 outputs since they are so cheap anyway. That is why I used the 02 and 08 since they have four gates each... http://i126.photobucket.com/albums/p106/fsafstrom/ExtraOutput2.jpg
by fsafstrom
Jun Thu 26, 2008 11:58 pm
 
Forum: Creation Room
Topic: Extra outputs anyone ???
Replies: 4
Views: 13215

I was thinking of a 244 for the input and just keep input and output on separate addresses. That way I don't have to worry about any data direction registers... Maybe I could use the 245 to be able to read the current value on the output port... This solution does not allow you to read the current v...
by fsafstrom
Jun Thu 26, 2008 11:07 pm
 
Forum: Creation Room
Topic: Extra outputs anyone ???
Replies: 4
Views: 13215

Extra outputs anyone ???

Here is a simple way to provide some extra outputs in stead of using a 6522 or 6526... The 1D to 8D goes to the Databus of the 6502. R/W is the Read Write from the 6502. PHI2 is the clock from the 6502. Address Enable is an Active Low enable from an address encoder such as an 74LS138. For example, t...
by fsafstrom
Jun Thu 26, 2008 10:03 pm
 
Forum: Creation Room
Topic: Extra outputs anyone ???
Replies: 4
Views: 13215

I wish I could get one since I can probably think of a few of the tricks... ;-)
If there are any unused pins on the Propeller, I'll probably wire them to the breadboard area to add sound or maybe even VGA...

But I just cannot justify getting a new Replica since my Replica 1 SE works so good...
by fsafstrom
Jun Tue 24, 2008 4:59 pm
 
Forum: replica 1 General Discussion
Topic: Third Generation replica 1 coming soon
Replies: 6
Views: 13837

Sweet... That would mean you could drop in another Video driver if you wanted to... Here is a "screenshot" of one I made for my GridRunner project on the Hydra, http://forums.parallax.com/forums/default.aspx?f=33&p=1&m=237471#m273234 The leftmost picture might look a little bit fam...
by fsafstrom
Jun Tue 24, 2008 4:11 pm
 
Forum: replica 1 General Discussion
Topic: Third Generation replica 1 coming soon
Replies: 6
Views: 13837

I agree, it looks very nice...

Is that a Propeller chip I see over there.. ;-)
by fsafstrom
Jun Tue 24, 2008 2:44 pm
 
Forum: replica 1 General Discussion
Topic: Third Generation replica 1 coming soon
Replies: 6
Views: 13837

6522 vs 6526...

Here is one example of a RTFM error... ;-) I hooked up two 6526 Complex Interface Adapters (CIA) that I salvaged from an old C-64. I then tested the outputs and they seemed to work properly so I now have an expansion board with 32 I/O. I then hooked up the MAX3110 that I got to work on a 6522 VIA, t...
by fsafstrom
May Thu 08, 2008 9:19 am
 
Forum: replica 1 General Discussion
Topic: 6522 vs 6526...
Replies: 0
Views: 5006

The MAX7219 is both expensive and not suited to drive large displays. There are microcontrollers that costs a lot less and can do a lot more... Maybe a microcontroller that halts the CPU, access the momory (DMA), let the CPU continue and then generates the display would be a much better solution. Al...
by fsafstrom
May Tue 06, 2008 10:42 am
 
Forum: Creation Room
Topic: 24x24 LED Game of Life...
Replies: 20
Views: 66071

For 256x256 you would need an 8KB buffer for your bitmap. The 6522 can shift out 512Kbit per second at 1MHz, you need to send 16KB per 256x256 bitmap, 16x8 Kbit = 128 Kbit. So if you were able to load the shift register at maximum speed you would be able to send 4 bitmaps per second. So I don't thin...
by fsafstrom
May Mon 05, 2008 3:23 pm
 
Forum: Creation Room
Topic: 24x24 LED Game of Life...
Replies: 20
Views: 66071

230400 Baud anyone ???

Yes, you heard me, 230.4 KBaud on a Replica 1... ;-) My expansion board is way to big for a Robot base so I'm building a Replica Robot Control Board. However in stead of using a 6551 for Serial communication I decided to go with a Max3110 in stead since it's considerable smaller and eliminates the M...
by fsafstrom
Apr Tue 29, 2008 8:45 pm
 
Forum: Creation Room
Topic: 230400 Baud anyone ???
Replies: 0
Views: 7324

Sweet...

I hate to admit it, but my Replica have been gathering dust for a while now...
However this is really inspirational and I think it's time to dig out my Replica and start a robot project as well...
by fsafstrom
Apr Fri 25, 2008 10:02 am
 
Forum: Creation Room
Topic: Replica 1 And Fischertechnik
Replies: 3
Views: 11831

There is a thread about using a "matrix" style keyboard, check it out,
http://www.brielcomputers.com/phpBB2/vi ... .php?t=143

My guess would be that the TI-99 keyboard is a matrix keyboard as well...
by fsafstrom
Apr Fri 25, 2008 9:55 am
 
Forum: replica 1 General Discussion
Topic: Popular Electronics April 1974
Replies: 4
Views: 11283

I'll be @ the Maker Fair in Austin Oct. 18th and 19th...
I had a blast last year and can higly recomend it...

Who doesn't love Tesla coils that plays the Mario theme... ;-)
by fsafstrom
Apr Fri 25, 2008 9:41 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: Maker Faire
Replies: 3
Views: 10309
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