- Bipolar PROM replacement? - 3 Updates
- I need an inspection camera - 1 Update
| Jeff Liebermann <jeffl@cruzio.com>: Jul 05 10:11AM -0700 On Mon, 5 Jul 2021 03:13:57 -0500, John Crane >The 74LS471 you mentioned is a new possibility I hadn't considered. >Lower power should reduce the heat a bit. A lot. Look at the data sheets. (I'm still too lazy today). >If I can find a programmer for it, that would look more in 'spec' for >the vintage machine. Ummm... they're all over the web: <https://www.google.com/search?q=bipolar+prom+programmer+74LS471> <https://www.arlabs.com/device.html#bipolar_proms> <https://www.ebay.com/sch/i.html?_nkw=prom+programmer> Since this is beginning to look like a one time use for the PROM burner, you might consider having someone with a bipolar PROM burner do the work. For example: <https://www.hobbyroms.com> Otherwise, a 2716/32/64 EPROM might be easier to program. -- Jeff Liebermann jeffl@cruzio.com PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
| John Robertson <spam@flippers.com>: Jul 05 12:51PM -0700 On 2021/07/05 1:13 a.m., John Crane wrote: > the vintage machine. > Thanks! > -J Hi John, I have a Data IO 29B with Unipack 2B that will program the 74LS471. Email me for details jrr@@@flippers...com (spam@@@flippers...com is also valid - the 'bots don't believe it so I get little to no junk email on that address) I am in Canada which may or may not be helpful for postage. John :-#)# |
| Sergey Kubushyn <ksi@koi8.net>: Jul 06 06:36AM > Sometimes those PROMs were used as glue logic, i.e. to implement a > random logic function, like in a PAL or GAL. > For that purpose, you need a faster device than for running code. Just in case someone might need a faster PROM replacement, here is an idea: https://www.ebay.com/itm/322522213187 45nS 2Kx8 in narrow DIP24. There are even faster ones, like 35nS. --- ****************************************************************** * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas NV, USA < > Miracles require 24-hour notice. * ****************************************************************** |
| Klay Anderson <mailserver.cctv@gmail.com>: Jul 05 12:04PM -0700 On Friday, July 2, 2021 at 10:22:06 AM UTC-6, Frankly wrote: > 9" screen or bigger. > A Windows tablet will do but is less acceptable due to cost. > Suggestions please. Ferret Tools make several cams that work over a WiFi network it creates. Look up "ferrettools" and check them and their accessories out. |
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