Not really, if you have a slow chip/fast CPU just add wait states to the board.
John From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Albrecht Sent: Wednesday, July 15, 2015 9:26 AM To: [email protected] Cc: [email protected] Subject: Re: [N8VEM-S100:7411] Re: V3 Dual IDE/CF S100 Bus board initial checks On Tuesday, July 14, 2015 at 7:09:18 PM UTC-7, [email protected] wrote: Hi John, >> Those IDE boards are in fact a very simple boards. I agree! On paper, at least. But all the chatter I've seen here w.r.t. the flavor of 8255, mods. to the boards, and subs. for some of the standard LS logic, leads me to believe that they are not all that straightforward. Debugging the write to the 8255 today. It struck me to check the part number of my 8255. I have a 'P8255' I obained that part number from an older IDE/CF BOM. The BOM for the IDE/CF v.3 specifies a '8255AC-5' is this a deal breaker? Do I specifically need the '8255AC-5' ?? I did check U108 74LS373 has data on pins 2, 5... -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
