Hi. I need a simple microcontroller-like IC for a design i'm working on, and on a box of old ICs, salvaged from junk, i found this IC; all i could find about it it's that it used a "instruction set similar to the
Does anyone has any info on this IC, or know where i could get a datasheet? Thanks in advance.
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Is this an EEPROM version? Does it have a quartz window? If not then you won't be able to use it.
We had to buy three (1/10" lead pitch) ceramic DIL pin versions for development (in 1986). They had "piggy back" EEPROMS that you plugged into and extra set of DIL pins set into the top of the packages.
We developed and debugged the code on a 6502 machine and then blew the image into the EEPROM and plugged it into the M50747 (the "Jumbo" because of the "...747" and the 4K of EEPROM).
It also has a few extra instuctions (extra the 6502 set).
Then we sent the image to Japan and they produced factory masked production runs of minimum 5000.
Cheers Robin
As far as I know the device is a real 6502 core. Maybe similar to the
65SC151. TryA few online datasheet archives have the information you're looking for but want to paid for it.
regards - Henry
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Lisandro Pin schrieb in Nachricht ...
I found the datasheet for it on
As for the device itself, it's the DIP-64 version, without the quartz window (i DO have a bunch of 64kb EEPROMs that i think came with the
50747 itself). So it has a hardcoded ROM on it :( Bummer, i thought i got lucky. I think the ROM can be overriden with an external IC, but i needed something of trivial implementarion, like a PIC - i'm not very familiar with microprocessors, and i don't have the gear to burn an EEPROM either. I do know the 6502 assembler well though, from my C64 days.I found the datasheet for it on
As for the device itself, it's the DIP-64 version, without the quartz window (i DO have a bunch of 64kb EEPROMs that i think came with the
50747 itself). So it has a hardcoded ROM on it :( Bummer, i thought i got lucky. I think the ROM can be overriden with an external IC, but i needed something of trivial implementarion, like a PIC - i'm not very familiar with microprocessors, and i don't have the gear to burn an EEPROM either. I do know the 6502 assembler well though, from my C64 days.
These ones are free :
I think you should consider a modern CPU. If you learned any assembly language you're able in short time to switch to another Assembler type. It's really no problem! Look for AVR (www.atmel), PIC
cu - Henry
SNIP
Several processors (like 804x) have one pin to switch between internal and external program memory. OK you loose a lot of IO pins this way.
Wim
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