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View Full Version : 7111 82S23 27S18 6330 74S188 18SA30 7602 prom burner help



Lurch666
April 26th, 2017, 11:25 AM
I'm currently fixing a Nascom 2 (http://www.vcfed.org/forum/showthread.php?57307-Nascom-2-Troubleshooting)and need to replace a prom that I think does some sort of decoding.
Looking here:http://www.nascomhomepage.com/pdf/nas2proms.pdf it's a IM5600CPE the equivalents of which I put into the title.
I can get one from ebay but I only have a TOP853 usb eeprom burner which as far as I can tell doesn't read or write these chips.
Looking online the only ones I can find that can burn these proms cost hundreds so does anyone either have something that can write these proms for me,know of a cheap prom writer or knows where I could get a prom pre-programmed as a nascom N2MD/3?

Thanks.

Malc
April 26th, 2017, 12:51 PM
If it's any help i can read / write those proms, Just checked the device list for my Data I/O 29b and Unipak 2b, It list's the:

ISL 5600
FUJ 7111
HAR 7602
PHL 82S23
AMD 27S18
AMD 6330
NAT 74S188

I have none of those proms in stock.

Chuck(G)
April 26th, 2017, 01:01 PM
Sometimes you can translate the ROM contents (these are all bipolar PROMs) into equations that a GAL can handle. The socket may not exactly fit, but you can get the job done. cf. my adaptation of the bipolar PROM on the 5160.

It's a bit of a long shot, but it has been known to work.

Lurch666
April 26th, 2017, 08:22 PM
If it's any help i can read / write those proms, Just checked the device list for my Data I/O 29b and Unipak 2b, It list's the:

ISL 5600
FUJ 7111
HAR 7602
PHL 82S23
AMD 27S18
AMD 6330
NAT 74S188

I have none of those proms in stock.

Could I either paypal you 20 for you to get a chip from ebay,burn it for me then send it or I could get the chip and send it to you?

Thanks for the help.I've been fretting about getting this sorted as it's a major stumbling block for me.
@Chuck(G)-will look into a GAL incase I need to sort this in the future as it's something I've never heard of before.

Chuck(G)
April 26th, 2017, 08:50 PM
See this topic for an example:

http://www.vcfed.org/forum/archive/index.php/t-28128.html

gslick
April 26th, 2017, 09:31 PM
For what it's worth, my BP Microsystems BP-1410 programmer says it can program these versions:

Signetics(Philips) 82S23 Size: 20x8h
AMD Am27S18 Size: 20x8h

I don't have any of those on hand. Looks like you would have to buy around a dozen or more of them to get them in the $1 - $2 range each.

Kakemoms
May 3rd, 2017, 01:28 PM
For what it's worth, my BP Microsystems BP-1410 programmer says it can program these versions:

Signetics(Philips) 82S23 Size: 20x8h
AMD Am27S18 Size: 20x8h

I don't have any of those on hand. Looks like you would have to buy around a dozen or more of them to get them in the $1 - $2 range each.

It probably takes the others as well. I have a BP Microsystems CP-1128 that even takes PLD devices (one of the few that can burn Signetics). Since I live in Norway, p&p to UK is only around 6GBP. I will check my programmer in the weekend to see if the software supports the chips you listed. I don't think I have any myself, but I shall ask around.

Kakemoms
May 6th, 2017, 02:02 AM
It probably takes the others as well. I have a BP Microsystems CP-1128 that even takes PLD devices (one of the few that can burn Signetics). Since I live in Norway, p&p to UK is only around 6GBP. I will check my programmer in the weekend to see if the software supports the chips you listed. I don't think I have any myself, but I shall ask around.

I can confirm that my programmer lists 82s23, 27s18 and 74s188. It will probably take the other ics as well, but they are not specifically listed.

Unfortunately I haven't found any of the listed IC's locally, so you will need to provide me with an ic or I can order it off ebay if you want me to.