Pdp11/23+ EPROM upgrade

Chuck Guzis cclist at sydex.com
Thu Feb 5 14:30:08 CST 2015

On 02/05/2015 12:15 PM, Roe Peterson wrote:
>> On Feb 5, 2015, at 2:01 PM, Chuck Guzis <cclist at sydex.com> wrote:
>>> On 02/05/2015 11:43 AM, Glen Slick wrote:
>>>> On Thu, Feb 5, 2015 at 10:49 AM, Roe Peterson <roeapeterson at gmail.com> wrote:
>>>> I want to update the EPROMs on my 11/23+, which currently has 2716s.  I'm going to need 64k chips, and I understand 2764s won't work on this board.
>>>> What are my replacement options?  I have a fairly capable programmer, it can probably handle anything with 64k capacity.
>>> MCM68766
>> There's also the '68765--a crap-shoot as far as which is easier to find.
> How about MC68764L?

If it's fast enough, probably.  The 764 did start the Moto line of 64Kb 
of 24-pin EPROMs. Doubtless one could also probably work up an SMT 
EEPROM as a plug-in module.


More information about the cctech mailing list