I'll throw this out there for discussion, but the functional equivalent of a TI-84 calculator would be ideal. It has a usb port to connect to a computer, a serial port that takes a full qwerty keyboard that TI makes, and I believe runs at 10Mhz on a Z-80. If you had that on a S-100 card, with a mezzanine board like the SMB, then you should be able to run it free standing off a 9v battery to test everything, use dip switches to disable memory etc. when you put it on a backplane. It would be illegal to run any TI software on it, but there are 3rd party free operating systems for these calculators. TI actually tried to prosecute the hobbyists for that years ago because they cracked a 512 bit RSA code to unlock their calculators. Think it actually is illegal to do that in the U.S. now. You'd want to run cpm anyway once you were on a full system. Almost certainly need to do some surface mount to make it work. And I'm not talking about reverse engineering the TI-84, just using the same or similar settings so the 3rd party OS would work on it. I don't think they can say anything about you plugging their keyboard into it, although they might try. Matt Turner
Date: Fri, 9 May 2014 10:29:37 -0700 From: geka...@gmail.com To: n8vem...@googlegroups.com CC: mon...@vitasoft.org Subject: Re: [N8VEM-S100:3582] Re: Looking for a few boards.... I wasn't aware of the utility board that Andrew mentioned, it might be a good solution. Something as simple as adding a small amount of ram/eprom and a single serial port to a Z80 board would give folks an entry point. As long as the ram could be disabled later it wouldn't take up much space or cost. Using a FTDI/USB cable would even eliminate the need for RS232 and the associated jumpers, drivers etc. Sadly I lack the expertise to put it all together. - Gary On Friday, May 9, 2014 1:08:29 PM UTC-4, monahanz wrote: This “All in One” S-100 board request/issue comes up from time to time. With current static RAM chips and high density I/O chips it might be possible to put together a reasonable Z80 board “All in one” S100 board for a specific hardware setup. However in getting an old/new system up from scratch there are a lot more moving parts that have to work right to get a monitor on the console. Because there are many console I/O arrangements, disk controller arrangements, video arrangements etc., it’s actually easier to debug things on separate boards. If you suspect one board, you can flip it out with another similar/alternative board and try that one. A number of people may not have an interest in using a second CPU master/slave setup initially but often you will find it will occur later. Having a Z80 board that can work with greater than 64K of RAM is really useful not only for CPM3 but is debugging 16 bit CPU’s. Getting this capability and well as master slave capability, wait states, and an onboard ROM etc. on one S100 board with 74XX chips uses up a full board. You would have to go to SMT, GAL’s or CPLD’s etc. . These have their own issues. I have toyed around with the idea of an S100 “diagnostic” board that would look at and pulse a number of S100 lines instead of a Z80 board and provide back a readout, but I always seen to come back to it not being much better than analyzing signals (logic probe, scope) with a Z80 board in HALT mode or a simple loop. John The closest to an all in one solution would be the S-100 Utility board (RAM/ROM/UART/parallel/RTC) and an S-100 Z80 CPU board. It is two boards but that is about the limit without using PALs/GALs/CPLDs. If someone wants to design new boards using denser designs they are free to do so. Thanks and have a nice day!
Andrew Lynch I'm happy to do the 4mb ram and either 8088 or 8086. With the 80286 in production I'm not sure it pays to do both, and the 8088 might make more sense. The 4mb board is a nice simple solution for 8 bit processors.
If Todd handles the extender board, perhaps Ed could pick up the 68000 and Ram/Rom boards?
I don't have the expertise, but I'd love to see an "all in 1" starter board like the ADC Super Six. Something like a Z80 board with Eprom, 128kb and a serial port. It would be a perfect entry combined with the Dual IDE and ZFDC boards.
- Gary
On Thursday, May 8, 2014 10:07:14 AM UTC-4, Todd Goodman wrote: I can as well. I was planning to do an S-100 Bus Extender Board run...
Todd
* Edward Snider <zipp...@gmail.com> [140508 08:44]:
> I can handle runs on some of these too Gary.
>
> Ed
>
> On Wednesday, May 7, 2014 9:55:15 AM UTC-5, gek...@gmail.com wrote:
> >
> > The Z80 CPU board V2 are in production, and should be available shortly.
> > I'll submit the ZFDC boards for fabrication once the CPU boards arrive.
> >
> > Anyone with spare boards they'd consider selling or trading?
> >
> > I'm especially hoping for:
> >
> > 4mb Static Ram
> > 8086 CPU
> > 8088 CPU
> > 68000/68010 CPU
> > Ram+Rom
> > S-100 Bus Extender Board
> >
> > Let me know what you've got :) If none show up I'll look into sponsoring
> > a run of several of these.
> >
> > - Gary
> >
>
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