[Coco] Primer on burning EPROMS?

[Daniel Campos]

MCM6830 is a 8K ROM. You will need to check the datasheet to see if the
pinnout is similar to the 68766 EPROM. Probably with little modification,
can be readable on this Transtronics programmer.

Daniel

2015-01-27 14:07 GMT-02:00 Christopher Barnett Fox <cbfox01 at syr.edu>:

> Is that what I¹d need to read the ROM from a Heathkit ET-3400 trainer? The
> IC is marked ³444-17² and ³6830², and I believe I see just a hint of a
> Motorola logo. The trainer CPU is a Motorola 6800.
>
> I just bought the TL866CS EEPROM burner, but I don¹t see either 444-17 or
> 6830 in it¹s list of supported ICs.
>
> Christopher
>
>
> On 2015/01/27/, 7:40 AM, "Daniel Campos" <daniel.campus at gmail.com> wrote:
>
> >If anyone needs a modern EPROM programmer to burn the old 68764 / 68766
> >used on the CoCo, you can go with the Transtronics Pocket Programmer 3
> >USB:
> >
> >
> https://secure.transtronics.com/osc/product_info.php/cPath/55/products_id/
> >621
> >
> >It's not cheap as those chinese programmers but can effectively burn those
> >old Motorola EPROMs. I have one and works flawlessly.
> >
> >Daniel
> >
> >2015-01-27 1:13 GMT-02:00 Rogelio Perea <os9dude at gmail.com>:
> >
> >> On Mon Jan 26 2015, Christopher Barnett Fox wrote:
> >>
> >> Wanted to try burning some EPROMs, so bought one of the inexpensive
> >>Chinese
> >> > TL866CS universal programmers off eBay, $39.99 shipped. Is there a
> >>primer
> >> > anywhere on what else I'll need hardware-wise (e.g., a good source for
> >> > compatible EPROMs, suitable cartridge interface, etc.), and
> >>information
> >> on
> >> > how to actually burn and test?
> >> >
> >> > For cartridge interface, I have an FD-501, an FD-502, and a Disto Mini
> >> > Controller 1.
> >> >
> >>
> >> The main thing while working with the CoCo is that all disk controllers
> >> from Tandy prior to the FD-502 have a 24 pin socket for the ROM, the
> >>chips
> >> that Tandy used are hard to find and if found, the programmer you have
> >>(and
> >> many other modern ones) will have a hard time working with those chips -
> >> bottom line you need to work with a 2764 28 pin EPROM, you can get
> >>those at
> >> Jameco (where I recently bought a couple for my ADOS explorations),
> >>other
> >> vendors should have them as well (Mouser, Digikey, Ebay).
> >>
> >> The 2764 can be fitted into a 24 pin socket provided you run a couple of
> >> jumpers and modify a couple of traces on the controller board (from the
> >> earliest CoCo disk controller up to the FD-501); I do not have a Disto
> >>Mini
> >> Controller but I assume it already comes ready for a 28 pin ROM, your
> >>2764
> >> should just be a drop in install.
> >>
> >> The 28 pin to 24 pin adapter you can find info on the web on how to do
> >>it,
> >> there is an outlet that sells a ready made adapters although these are
> >> built in such a way that when placed on the disk controller you won't be
> >> able to close the case - the whole setup grows beyond the maximum
> >>allowable
> >> height inside the closed controller shell. Cloud 9 used to sell low
> >>profile
> >> adapters, check with them for availability.
> >>
> >> Last but not least, hopefully you bought an EPROM eraser. You will need
> >> one! :-)
> >>
> >>
> >> -- RP
> >>
> >> --
> >> Coco mailing list
> >> Coco at maltedmedia.com
> >> https://pairlist5.pair.net/mailman/listinfo/coco
> >>
> >
> >--
> >Coco mailing list
> >Coco at maltedmedia.com
> >https://pairlist5.pair.net/mailman/listinfo/coco
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>