6502.org Forum Projects Code Documents Tools Forum
It is currently Sat Nov 23, 2024 10:14 pm

View unanswered posts | View active topics


Board index » 6502.org Users Forum » Hardware

All times are UTC




Post new topic Reply to topic  Page 1 of 1
  [ 4 posts ] 
  Previous topic | Next topic 
Author Message
Michael
PostPosted: Tue Jan 09, 2024 12:33 pm 
Offline
User avatar

Joined: Wed Feb 13, 2013 1:38 pm
Posts: 589
Location: Michigan, USA
Could a 74HC151 be used as an address decoder in the (RAM only) circuit below? I don't have a '151 at the moment to test.

Attachment:
xUART65 A1 ram (3).png
xUART65 A1 ram (3).png [ 180.58 KiB | Viewed 190237 times ]

I also wonder if a 74HC151 could be configured to allow inserting 4K I/O blocks into either the upper or the lower 32K address space?

TIA, guys. Cheerful regards.

Attachment:
74HC151 Decoder.png
74HC151 Decoder.png [ 80.31 KiB | Viewed 190237 times ]


Attachments:
74HC151 Datasheet (TI).pdf [476.87 KiB]
Downloaded 64 times
Top
 Profile  
Reply with quote  
BigDumbDinosaur
PostPosted: Tue Jan 09, 2024 3:48 pm 
Offline
User avatar

Joined: Thu May 28, 2009 9:46 pm
Posts: 8513
Location: Midwestern USA
Man, that thing is as slow as molasses in January in the Arctic.

_________________
x86?  We ain't got no x86.  We don't NEED no stinking x86!
Top
 Profile  
Reply with quote  
plasmo
PostPosted: Tue Jan 09, 2024 5:28 pm 
Offline

Joined: Fri Dec 21, 2018 1:05 am
Posts: 1120
Location: Albuquerque NM USA
Well, CMOS runs really fast January in Arctic, so it'll just congeal in the hot New Mexico sun in July. :lol:
Top
 Profile  
Reply with quote  
BigDumbDinosaur
PostPosted: Tue Jan 09, 2024 7:37 pm 
Offline
User avatar

Joined: Thu May 28, 2009 9:46 pm
Posts: 8513
Location: Midwestern USA
The 74HC161 is a good candidate for synthesis in a GAL.  7-10ns versus 50ns.

_________________
x86?  We ain't got no x86.  We don't NEED no stinking x86!
Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 4 posts ] 

Board index » 6502.org Users Forum » Hardware

All times are UTC


Who is online

Users browsing this forum: No registered users and 29 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
6502.org is an ongoing project by Mike Naberezny and contributors.