Re: Programming Bipolar PROMs (Tom Hunter)

2021-10-27 Thread Mark Moulding via cctalk
inal Message- From: Holm Tiffe Sent: Tuesday, October 26, 2021 12:19 PM To: m...@markesystems.com ; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Programming Bipolar PROMs (Tom Hunter) Mark Moulding via cctalk wrote: From: Tom Hunter Subject: Programming Bipolar PROMs >

Re: Programming Bipolar PROMs (Tom Hunter)

2021-10-26 Thread Holm Tiffe via cctalk
Mark Moulding via cctalk wrote: > From: Tom Hunter > Subject: Programming Bipolar PROMs > > > The part is an Intersil IM5600CP, but these were also made by others, for > > example Signetics and Philips made the 82S23 and TI and NTE made the > > faster > > SN74S188N. Some vendors still sell thes

Re: Programming Bipolar PROMs

2021-09-28 Thread Mike Stein via cctalk
... and also has many rare ones in stock; reasonable prices, good guy! On Mon, Sep 27, 2021 at 11:38 PM ben via cctalk wrote: > On 2021-09-27 9:23 a.m., Tom Hunter via cctalk wrote: > > While restoring and repairing a Data General Nova 2/10 I found a bad > > bipolar PROM on the CPU board. The PR

Re: Programming Bipolar PROMs

2021-09-27 Thread ben via cctalk
On 2021-09-27 9:23 a.m., Tom Hunter via cctalk wrote: While restoring and repairing a Data General Nova 2/10 I found a bad bipolar PROM on the CPU board. The PROM has open-collector outputs and is organized as 32 words by 8 bits. It appears that one of the open-collector driver transistors is fau

Re: Programming Bipolar PROMs (Tom Hunter)

2021-09-27 Thread Mark Moulding via cctalk
From: Tom Hunter Subject: Programming Bipolar PROMs The part is an Intersil IM5600CP, but these were also made by others, for example Signetics and Philips made the 82S23 and TI and NTE made the faster SN74S188N. Some vendors still sell these parts and there are even a few on Ebay. How do I

Re: Programming Bipolar PROMs

2021-09-27 Thread Glen Slick via cctalk
On Mon, Sep 27, 2021 at 11:20 AM Brent Hilpert via cctalk wrote: > > The 82S23 programming algorithm is in the 1975 Signetics Bipolar Memories > databook (also on bitsavers). > Looks like it may be a little more complex than that for the 188. http://www.bitsavers.org/components/signetics/_dataB

Re: Programming Bipolar PROMs

2021-09-27 Thread Brent Hilpert via cctalk
On 2021-Sep-27, at 10:52 AM, Brent Hilpert via cctalk wrote: > On 2021-Sep-27, at 8:23 AM, Tom Hunter via cctalk wrote: >> While restoring and repairing a Data General Nova 2/10 I found a bad >> bipolar PROM on the CPU board. The PROM has open-collector outputs and is >> organized as 32 words by 8

Re: Programming Bipolar PROMs

2021-09-27 Thread Glen Slick via cctalk
On Mon, Sep 27, 2021 at 8:23 AM Tom Hunter via cctalk wrote: > > The part is an Intersil IM5600CP, but these were also made by others, for > example Signetics and Philips made the 82S23 and TI and NTE made the faster > SN74S188N. Some vendors still sell these parts and there are even a few on > Eb

Re: Programming Bipolar PROMs

2021-09-27 Thread Brent Hilpert via cctalk
On 2021-Sep-27, at 8:23 AM, Tom Hunter via cctalk wrote: > While restoring and repairing a Data General Nova 2/10 I found a bad > bipolar PROM on the CPU board. The PROM has open-collector outputs and is > organized as 32 words by 8 bits. It appears that one of the open-collector > driver transisto

Re: Programming Bipolar PROMs

2021-09-27 Thread Chuck Guzis via cctalk
On 9/27/21 10:05 AM, dwight via cctalk wrote: > Most of these older fused PROMs are of comparable speed in newer > EPROMs or E2PROMs. Open collector is a hassle but not too much. One > can create the needed circuits using surface mount parts for size > reduction. A hassle but not out of the questio

Re: Programming Bipolar PROMs

2021-09-27 Thread Liam Proven via cctalk
On Mon, 27 Sept 2021 at 17:23, Tom Hunter via cctalk wrote: > > While restoring and repairing a Data General Nova 2/10 I found a bad > bipolar PROM on the CPU board. Maybe it was just feeling depressed this week. Try it again next week and you might find it works... maybe even really fast? (Sorr

Re: Programming Bipolar PROMs

2021-09-27 Thread dwight via cctalk
it can be used for additional storage with a switch or jumper select. Dwight From: cctalk on behalf of Brian Marstella via cctalk Sent: Monday, September 27, 2021 9:16 AM To: Jay West ; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Programming

Re: Programming Bipolar PROMs

2021-09-27 Thread Brian Marstella via cctalk
I recently picked up an EPROM+ programming unit ( https://www.arlabs.com/eprom_plus.html) from eBay used in order to program a couple of PROMs. Unfortunately, I haven't actually tried it yet but the 82S23 and others are supported. The owner of the company seems to be extremely responsive to any and

RE: Programming Bipolar PROMs

2021-09-27 Thread jwest--- via cctalk
Jon wrote... I can do them with the Data I/O 29B and UniPak 2B. Some of the other UniPaks can handle them too. They are one of those devices that most of the newer commercial programmers can't do. I wouldn't call the Data I/O really affordable, though. -- Same, I use a data i/o 29B for these

Re: Programming Bipolar PROMs

2021-09-27 Thread Jonathan Chapman via cctalk
I can do them with the Data I/O 29B and UniPak 2B. Some of the other UniPaks can handle them too. They are one of those devices that most of the newer commercial programmers can't do. I wouldn't call the Data I/O really affordable, though. If you want to send us a blank we can program it for yo