Doc64 #26 | Commodore C64 | What's the PLA for and how does it work?

Videobeschreibung:
Today I want to show you ...
What is the PLA (Programmable Logic Array)?
What is the PLA for?
What is the PLA's job?
How does the PLA work?
What is inside the PLA?
Are there replacements for the PLA?
Measuring the signals at the PLA
Measuring CAS, CASRAM, AEC, ROMH, ROML, VA12, VA13, VA14, KERNAL, BASIC, CHAROM, IO, BA, GR/W, R/W, EXROM, HRAM
PLA 906114-01, MOS 906114-01, Signetic 82S100
PLA U17


PLA alternatives:
EPROM+adapter (best suited EPROM: STMicroelectronics M27C512-90B6)
realPLA (by ‚skoe‘ Thomas Giesel)
https://www.c64-wiki.de/wiki/realPLA
SuperPLA V4 (by Jens Schönfeld, INDIVIDUAL Computers)
https://icomp.de/shop-icomp/de/shop/p...
https://amigastore.eu/152-superpla-v4...
PLA20V8 consists of two GAL20V8B
PLAnkton
https://www.polyplay.xyz/PLAnkton-PLA...


And many more …
Have a look at c64os.com/buyersguide/


Sources:
C64 memory map:
https://www.c64-wiki.de/wiki/PLA_(C64...)
https://www.c64-wiki.com/wiki/PLA_(C6...)

C64 PLA dissected:
http://skoe.de/docs/c64-dissected/pla...
by Thomas ‚skoe‘ Giesel

VERSA Cart and C64 ROMs (C64 OS Homepage by Gregory Nacu):
http://www.c64os.com/post/versa64cart

Standard Memory Configuration C64 PLA:
William Levak and Ann Arbor, 1986, Commodore 64 Memory Configurations,
The Transactor, Volume 6, Issue 05, p. 51-55.

Picture „Standard Memory Config“:
http://zimmers.net/anonftp/pub/cbm/ma...
All mem configs from page p051.jpg to p057.jpg on zimmers.net:
http://zimmers.net/anonftp/pub/cbm/ma...

Picture „EPROM as PLA replacement“:
http://www.vic20.de/html/eprom_pla_82...

PLA fault screens:
https://www.pictorial64.com/

Sven Petersens Block Diagram
http://tech.guitarsite.de/c64_block_d...

Sven Petersens Osciloscope Screenshots
http://tech.guitarsite.de/c64_scope.h...
Helpfull links:
https://www.pictorial64.com/

Trouble Shooting and Repair Guides:
https://archive.org/details/Commodore...

https://archive.org/details/C64-C64C_...


My Twitter Account:
  / doktor643  


Music:
Shades, 1986, 64er Markt&Technik by Chris_Huelsbeck