Re: VSDRIVE stand alone host (no pc) thread

[Kevin <kevin@hackaday.com>]

On Friday, October 5, 2012 2:35:55 AM UTC-5, Riccardo wrote:
> Il giorno venerdì 5 ottobre 2012 02:09:25 UTC+2, Kevin ha scritto:
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> > On Thursday, October 4, 2012 11:00:05 AM UTC-5, Riccardo wrote:
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> > > Il giorno giovedì 4 ottobre 2012 04:26:03 UTC+2, Kevin ha scritto:
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> > > > ok we all caught up? great
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> > > > by the time I plop on a couple LED's, mcu, rtc, level converters the current budget using the 80ma SD write currents its around 90-100ma (93.763ma based on a quick bom count) which is peaking out the 5 volt line on the joystick port, so if I use that say goodbye to mouse and joystick, as a gamer ... no
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> > > > dont get me wrong I would love to tap a 5 volt line, that saves ~40 cents, and heat. option 2 is attack the disk drive port, which if your loading the driver thats not blocking the disk drive may bork use of external disks and good luck finding db19 connectors for less than a buck each.
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> > > > Video port sounds good, and I could add a color killer as a bonus, but theres always the far and few that are using a VGA adapter or LCD screen ... (sigh)
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> > > > could make a T tap to the power supply, this is worthless if you have a C+ as the transformer is internal to the machine.
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> > > > might could pinch enough off the serial port if I beg that ADT totally undo its hardware handshaking and set the two lines high constantly, but that's not going to happen... 
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> > > > power = Pain In The Arse
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> > > > clock: what I mean is a disk that throws the apple into a basic terminal mode and a menu driven system on the avr is piped in, battery is not as big of a deal as I originally thought since your mention of your C+ not using DIN5 ports tosses the entire idea of a backpack out the window to a "on the side" dongle, which is fine as it will be one box for all machines, and it will be easier to hook to a pc for firmware updates.
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> > > > Finally the great thing about being able to flip images on the fly is you dont HAVE to have everything on a hard disk image, you can flip from a 32meg hard disk image, to a 140k prodos image, or a 800k prodos image. I am still thinking on the utility disk, set X amount of slots that you want to fiddle with, then hit a button to rotate through them. So if you are in a game mood you can load all of game whatevers disks in the slots and thumb through them at will, or fire up a hard disk image with appleworks. The system I am using supports FAT32 formatted devices, so in theory you could have all the prodos disks on Asimov on one card (though I have filename restrictions to enforce)
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> > > > whew ... wrote a novel
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> > > Hi Kevin, you Rock,
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> > > If you want, you could draw your schematic circuit on crib sheet like this: https://docs.google.com/open?id=0B1hhedcMCk9bTkwyTkg2VXJDblk;
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> > > so I try to follow you.
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> > > Riccardo.
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> > in a word ... no, but I will not be opposed to doing a drawing in fritzing, which produces a similar breadboard style drawings, and I can import my schematic directly to it, instead of drawing the same thing twice.
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> > hardware wise its pretty "simple", its just an arduino (eventually a clock) and a couple level shifters, so the whole thing can be whipped up on a piece of proto-board. Since I have access to professional level resources and equipment, I will be doing a small surface mount board, which if I end up making more than one of these things, will make the quality consistency shoot though the roof, and its 1000x faster to build.
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> > Though I will make everything open source, I am no where near ready to release anything .. schematic? heh not even started. Software, broken, design? I have an idea, possible production run? its possible if theres enough interest and I tickle the numbers right so its not a pile of money that only 3 people want.
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> Ok, but i probability wrong,
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> Why did not you use the external disk port of //c ?
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> You simple modify the hardware of external floppy disk drive.
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> Ric.

my C does not have smartport, so in order to do that I would need to emulate a dumb floppy drive off the back, I have been working on that very slowly, but it requires perfect timing, and then you are limited to 140k images