Re: I have a IIgs. So now what?

["Allen Bong" <allenbsf6502@yahoo.com>]

On Mar 3, 8:53 am, Tristan Mumford <xtristan.xmumf...@xgmail.xcom>
wrote:
> William Garber wrote:
>
> > "Jon" <jon...@gmail.com> wrote in message
> >1172825566.829716.159940@v33g2000cwv.googlegroups.com">news:1172825566.829716.159940@v33g2000cwv.googlegroups.com...
> > : On Mar 2, 6:51 pm, Tristan Mumford <xtristan.xmumf...@xgmail.xcom>
> > : wrote:
> > : >
> > : > I thought the builtin serial was compatible with SSC. But then what I
> > : > know about the IIgs could be written on a coaster.
> > :
> > : Some firmware included with the IIGS is supposed to make it
> > : "compatible" with the SSC, but the Apple II Game Server controls the
> > : SSC hardware directly.  I had no documentation of the SSC or the IIGS
> > : firmware at the time so I was working by disassembling code with the
> > : monitor and going nowhere... (I managed to get some stuff over to the
> > : IIGS but wasn't able to get the "serial OS" ported to work with the
> > : IIGS (I attempted to make standard firmware calls and leave it at
> > : standard 19200 baud, but again, got nowhere).  The SSC I got came with
> > : a manual and one day, I may start working on this one again.
> > :
> > : > Using HD can be hit and miss. Taping over the hole can work. Except
> > : > sometimes it may take five or six full formats. I used them in a mac
> > : > plus (400k internal drive). Also in my A500.
> > : > Some of them won't submit no matter how much they are pounded. I think
> > : > it has to do with the density of the magnetic media.
> > : I didn't format it that many times, but the mac can already read the
> > : disk... I wrote  a disk image of the GSOS installer (downloaded from
> > : apple's site somewhere).  This disk actually does work on an emulator
> > : but the IIGS only reads as far as the boot sector.  If i could get
> > : prodos bootstrapped into the IIGS from another source (serial?) I may
> > : try to format it from the IIGS, maybe THAT will work.. maybe my
> > : smartport is toast?  maybe the mac drive isn't actually IIGS
> > : compatible?
> > : >
> > : > For a sec I thought I was reading a quote of something I said
> > : > regarding the 3.5" homebrew interface. As in hardware project, not
> > : > beer. Speaking of which the weather is right to do another one :)
> > : >
> > : If you could come up with something that looks like a smartport device
> > : to the IIGS that would be cool.  We could have some fast storage
> > : without the hassle of handling not-so-easy to find low density floppy
> > : disks.
>
> > I am loaded, 100's, of used/formatted DS/DD 3.5" disks.
> > You can get $3/10 disks, and I will ship anywhere in
> > the world. However, postage may not be desirable for
> > some of you.
>
> > : > Forsome reason I get this image of a small brightly decorated shop
> > : > selling phonecards, knick-knacks, and digital logic chips.
> > : >
> > : > If it's not out of your way would you mind? It's something that is
> > : > common yet almost impossible to find!
> > :
> > : Speaking of that, Is there a substitute for the 74LS06?   I just
> > : checked jaycar and DSE they dont have it.. my best bet would be to
> > : find it on that shop probably still attached to some old board (and
> > : hopefully socketed)
>
> > The 74LS04, 74LS05, 74LS06, 74LS14 (schmitt trigger),
> > and CD4069 (open collector), should all be compatible.
>
> Are you sure about the 74LS14? I have one of them readily accessible (it's
> in my floppy adaptor board, and another in a dead 386 board I strip for
> parts.
>
> Tristan.
>
>
>
> > William Garber
> > Email Address - willy4...@garberstreet.com
> > Alt. Email - willy4...@comcast.net
> > Web address -http://www.garberstreet.com
>
> --
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http://www.datasheet4u.com/html/7/4/L/74LS14_TexasInstruments.pdf.html

74LS14 is a bad substitute for LS06 or LS05 as its o/p are not open-
collector (see datasheet above)

>From my Disk ][ circuit diagram the pullup for the /WR REQ comes from
the disk drive's analog board.  If you are not getting +5 on pin 4 of
your 74ls06, it might be an open resistor 1K R15 on the disk drive
card.

Allen