Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-26 Thread Adrian Graham
On 26/10/2015 17:09, "John Robertson" wrote: > Hi Adrian, > > Perhaps one final test for your 2332s is to do a Diode Test on the pins > relative to the ground pin (pin 12) and Vcc pin (24). These should sow > either open or something like 0.6 or higher voltage drop across

Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-26 Thread Mike Stein
Monday, October 26, 2015 1:09 PM Subject: Re: PROMs and EPROMs, specifically 2332/2532/2732 On 10/25/2015 4:37 PM, Adrian Graham wrote: On 25/10/2015 17:19, "John Robertson" <j...@flippers.com> wrote: Hi John and others, Thanks for that. I removed the diodes and wired 2332

Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-26 Thread John Robertson
On 10/25/2015 4:37 PM, Adrian Graham wrote: On 25/10/2015 17:19, "John Robertson" wrote: Hi John and others, Thanks for that. I removed the diodes and wired 2332 (21) to 2372 (24) leaving the A11 swap in place, the programmer complained about pin 18 missing. The adapter in

RE: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-25 Thread tony duell
> Further digging into available eproms that the programmer can read reveals > it CAN read 2532s, specifically the MCM2532 which the datasheet tells me has > the same pinout as the 2332. I still get "reverse insertion error" so I'm > guessing my PROMs are toast. As others have said, normally when

Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-25 Thread Adrian Graham
On 25/10/2015 08:27, "tony duell" wrote: >> Further digging into available eproms that the programmer can read reveals >> it CAN read 2532s, specifically the MCM2532 which the datasheet tells me has >> the same pinout as the 2332. I still get "reverse insertion error"

Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-25 Thread Adrian Graham
On 25/10/2015 02:19, "Mike Stein" wrote: > Probably a silly question, but I assume that if > you're using a 28-pin socket you are inserting it > aligned at the end *opposite* pin 1, with pin > numbers offset by 2 (ie. 2x32 pin1 is 2764/256 pin > 3, etc.)? > Hi Mike,

Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-25 Thread Adrian Graham
On 25/10/2015 17:19, "John Robertson" wrote: >> Hi John and others, >> >> Thanks for that. I removed the diodes and wired 2332 (21) to 2372 (24) >> leaving the A11 swap in place, the programmer complained about pin 18 >> missing. The adapter in front of me is now wired like

Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-25 Thread John Robertson
On 10/24/2015 5:56 PM, Adrian Graham wrote: On 24/10/2015 19:18, "John Robertson" wrote: On 10/24/2015 5:43 AM, Adrian Graham wrote: Hi folks, PET4032 repair continues with all ROMs, video RAM and dodgy sockets removed thanks to a hot air gun. Holes cleaned and I have

Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-25 Thread John Robertson
On 10/24/2015 5:56 PM, Adrian Graham wrote: On 24/10/2015 19:18, "John Robertson" wrote: On 10/24/2015 5:43 AM, Adrian Graham wrote: Hi folks, PET4032 repair continues with all ROMs, video RAM and dodgy sockets removed thanks to a hot air gun. Holes cleaned and I have

PROMs and EPROMs, specifically 2332/2532/2732

2015-10-24 Thread Adrian Graham
Hi folks, PET4032 repair continues with all ROMs, video RAM and dodgy sockets removed thanks to a hot air gun. Holes cleaned and I have new turned pin sockets for everything I've removed which I'll be fitting this afternoon. Since the ROMs came out OK I'm trying to dump them using my Pinmaster48

Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-24 Thread John Robertson
On 10/24/2015 5:43 AM, Adrian Graham wrote: Hi folks, PET4032 repair continues with all ROMs, video RAM and dodgy sockets removed thanks to a hot air gun. Holes cleaned and I have new turned pin sockets for everything I've removed which I'll be fitting this afternoon. Since the ROMs came out

Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-24 Thread Adrian Graham
On 24/10/2015 19:18, "John Robertson" wrote: > On 10/24/2015 5:43 AM, Adrian Graham wrote: >> Hi folks, >> >> PET4032 repair continues with all ROMs, video RAM and dodgy sockets removed >> thanks to a hot air gun. Holes cleaned and I have new turned pin sockets for >>

Re: PROMs and EPROMs, specifically 2332/2532/2732

2015-10-24 Thread Mike Stein
nosaurs.co.uk> To: <j...@flippers.com>; "General Discussion: On-Topic and Off-Topic Posts" <cctalk@classiccmp.org> Sent: Saturday, October 24, 2015 8:56 PM Subject: Re: PROMs and EPROMs, specifically 2332/2532/2732 On 24/10/2015 19:18, "John Robertson"