Micro Processor

takao21203

Joined Apr 28, 2012
3,702
GAL programmer + EPROM

or you can use more expensive FLASH chips. Most flash is serial now but parallel FLASH chips do exist.

when you don't know how to it is a lot of effort to make a 8085 circuit board.
 

alfacliff

Joined Dec 13, 2013
2,458
Ian Rogers, the same circutiry will ot work with 8051 and 8085, the 8085 has no built in i/o. the 8051 is an industrial controller, the 8085 is a genreal purpose micro processor. it was used in the trs80 model 100 portable computer. the language is quite similar, based on the roigional 8080 processor.
 

Ian Rogers

Joined Dec 12, 2012
901
Ian Rogers, the same circutiry will ot work with 8051 and 8085, the 8085 has no built in i/o. the 8051 is an industrial controller, the 8085 is a genreal purpose micro processor. it was used in the trs80 model 100 portable computer. the language is quite similar, based on the roigional 8080 processor.
Similar!!! I have built 8051 systems... and I have built 8085 systems

You can use the 8051 in the same mode as the 8085 and map all your IO's in memory..
I was also the proud owner of several Z80 based micro's...

The very first XT's had a 8085 chip in.... I had one of them too...
 

Ian Rogers

Joined Dec 12, 2012
901
Yes!! They had the 8086 They also used the 8088!! on reflection it may have been the 8088 as that didn't go very far... I know they released an 80188 and a 80186 not long after...

The 8085 became the MCS systems..

The point I was making is that you can use the same circuitry as my example on the 8085...
 

alfacliff

Joined Dec 13, 2013
2,458
the same, excdept you have to decode all the addresses and data lines. you have to demultiplex the data to where it goes, unlike the 8051 whitch has pins for 8 bit i/o lines, the basic command bit structure is the same, both based on the 8080 commands, but with more commands added. used to work on video games, the early quarter types, with everything from all ttl to 68010 processors. now a lot of the industrial stuff I work on is (other than the main processor in cnc) based on the 8051 family.
 

t06afre

Joined May 11, 2009
5,934
In its time it was a lot of books about those 8 bit processors. I guess most of them are gone by now. I have this one in my bookshelf, the book is quite good
 

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Ian Rogers

Joined Dec 12, 2012
901
alfacliff said:
the same, excdept you have to decode all the addresses and data lines. you have to demultiplex the data to where it goes, unlike the 8051 whitch has pins for 8 bit i/o lines
You can run the 8051 as an 8085... The 8051 has an external address bus and is multiplexed with the data bus.. just like the 8085... I have two circuits and they look the same...

Anyway!! The OP's not replied so this debate is pointless.
 
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