Thanks for all the info Josh . I will get the chip info when I get home . I can
also bring the chips and universal programmer to the next tpug meeting for
comments by the group
-------- Original message --------
From: Josh Bensadon <jbensadon@xxxxxxxxxxx>
Date: 02-12-2018 9:12 AM (GMT-05:00)
To: torontocbm@xxxxxxxxxxxxx
Subject: [torontocbm] Re: (no subject)
I took a look at the data sheets, VOH and VOL are the same, so they should work
just fine, but perhaps you have a slow EPROM?
Check the speed of each eprom, should be in the full part number, typically
they put a dash at the end with the speed, like -45 for 450nS. The ST data
sheet says -1 is the 350ns version. Check it
From: torontocbm-bounce@xxxxxxxxxxxxx <torontocbm-bounce@xxxxxxxxxxxxx> on
behalf of zsimonz <dmarc-noreply@xxxxxxxxxxxxx>
Sent: Monday, February 12, 2018 7:23 AM
To: torontocbm@xxxxxxxxxxxxx
Subject: [torontocbm] Re: (no subject)
I bought a universal rom programmer from China and it works well reading the
old chips from c64 oand others . I know the Motorola mcm2716 eprom works on the
old c64 and 1541 drives etc. So I I purchased the st 2716 eproms as well since
the data sheets
match I thought . I tried burning some roms and it didn't seem to work .
Does anybody know if the mcm2716 is compatible with the st 2716 ?
Is there any eproms that someone can recommend that are current day equivalent
?
Thanks
-------- Original message --------
From: Duke Nukem <dukenukem@xxxxxxxxxxxxxx>
Date: 02-11-2018 11:42 PM (GMT-05:00)
To: torontocbm@xxxxxxxxxxxxx
Subject: [torontocbm] Re: (no subject)
I'm right by the Etobicoke/Mississauga border in the GTA.
-Mark.
Sent: Sunday, February 11, 2018 at 10:04 PM
From: "Mike Stein" <mhs.stein@xxxxxxxxx>
To: torontocbm@xxxxxxxxxxxxx
Subject: [torontocbm] Re: (no subject)
Where in North America?
----- Original Message -----
From:
Duke Nukem
To:
Toronto CBM
Sent: Friday, February 09, 2018 1:27 AM
Subject: (no subject)
I posted this on Lemon 64 but I think TPUG members may be able to provide a
better answer since many users are here in Canada so MUST have some Members
that have had to solve the same issue below:
Okay, I broke down and decided to buy an EPROM Burner and it'll take a little
time to ship of course). Now, I want mainly to burn Kernal ROMs for my 1541C's
which drive knock every time I turn them on for starters. Also have a dead
Char. ROM or 2 etc.
So aside from fixing those and tinkering with making some Carts I also want to
play with making a few PLAs using the AT27C512R-45 chip so what do you
recommend cause I've found some listings:
1) 10pcs/lot M27C256B-10F1 M27C256B 27C256 DIP-28 IC
2) 10PCS M27C128-10F1 27C128
3) AM27C256-150D AM27C256 27C256
Just to list a few but obviously these seem to ALL be sourced from China and
I've read stories where ppl swear they're recycled parts.
Any links and/or recommendations would GREATLY be welcome especially given the
above applications I have for my future EPROM Burner. Especially source and
Brand.
Just keep in mind I'm in North America.
Thanks.
-Mark.
