[Coco] 24 and 28 pin Eprom

[David Jones]

Just make sure to use EPROM with lower programming voltages.  That programmer can't do higher voltages.  So I usually stick with the 27CXXX parts.
David
 

    On Wednesday, August 2, 2017 7:55 AM, Dave Philipsen <dave at davebiz.com> wrote:
 

 The 27C256 EPROM could also replace the ROMs in the older CoCos if you know what you're doing. You could even replace two ROMs (BASIC and Ext BASIC) with a single 27C256 but that would require a little more work.

Dave

> On Aug 2, 2017, at 6:32 AM, Dave Philipsen <dave at davebiz.com> wrote:
> 
> 2764 or 27C64 for the older CoCos (8K) and 27C256 for the CoCo 3 (32K).
> 
> Dave
> 
> ----- Reply message -----
> From: "Carlos Camacho" <idevgames at gmail.com>
> To: <coco at maltedmedia.com>
> Subject: [Coco] 24 and 28 pin Eprom
> Date: Wed, Aug 2, 2017 6:19 AM
> 
> I'm about to buy a TL866A USB burner so I can make BASIC roms for a few of
> my machines without extended BASIC.
> 
> Can I get recommendations for a 28 pin eprom to buy? I'm new to burning and
> understand its very hard to find 24 pin ones now.
> 
> So to refresh my memory, the older 2 rom CoCos used 24 pin Eproms. So, I'll
> need to get a 28, and make an adapter to go to 24 pin. And burn Extended
> BASIC. And the newer CoCos used a single 28 pin with both BASIC and
> Extended BASIC. So one 28 pin with both basics should do it.
> 
> So, I should be looking for 28 pin for both style of CoCos.
> 
> Thanks,
> 
> Carlos
> 
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