Hi Al Many programmers use the +5V to switching boost for programming voltage because the needed level has a low current load for the programming level. The additional wire might be for a negative level, such as RS-232 or DRAM. These are still things that can be traced out with and ohm meter and also look for polarized capacitors. If there is RS-232, look for the drivers. Maxim parts use built in capacitive charge pumps and don't need a negative rail. These are all good indicators of what the levels are. PAL programmers need higher programming current than EPROMs. I don't know the particular programmer's purpose you have. Dwight ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Al Kossow via cctalk <cctalk at classiccmp.org> Sent: Tuesday, September 15, 2020 8:38 AM To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: ISO Advantech Labtool-148C prgrammer wall wart specs On 9/15/20 7:39 AM, dwight wrote: it is two DC voltages. I haven't traced out which one is 5v

Sounds fun. I was not able to get anything useful out of my one 1702 that is causing difficulties. I believe is was a copy of a bad image. I should try the other one that has a blank section on 25%. It might be an addressing problem but who knows. I can't think of an open address pin that would blanks just 25%. It is more likely just broke inside. It is an early EPROM type with the gold pin that are in bad shape after being stored on the black rubber foam. I've needed to solder a socket to that first one, to get good contacts on all the pins. Messy! Dwight ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Al Kossow via cctalk <cctalk at classiccmp.org> Sent: Tuesday, September 15, 2020 12:18 PM To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: ISO Advantech Labtool-148C prgrammer wall wart specs On 9/15/20 11:24 AM, dwight wrote: It is a 2000's era parallel programmer with downloadable FPGA configuration. I can trace it out and note the voltages on the filter caps as an estimate. I was just hoping someone could quickly tell me what the wall wart said. There is an Advantech dealer on ebay in Greece selling one, I've sent them a message if they have the supply or could at least tell me what the voltages should be. I got this one cheap since it has programmable Vcc for read/verify. I have one 2764 giving me trouble reading. I may just be faster to lift the Vcc pin on it and attach it to a bench supply.

One of the small floppy drive power supplies would be good. Too bad Halted is not still active. Dwight ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Al Kossow via cctalk <cctalk at classiccmp.org> Sent: Wednesday, September 16, 2020 5:59 AM To: cctalk at classiccmp.org <cctalk at classiccmp.org> Subject: Re: ISO Advantech Labtool-148C prgrammer wall wart specs for the archives, the Labtool-148C wall wart is: +5V/1.5A ,+12V/1.5A it also has one of those funny 1/4" square usb looking connectors with the pins arranged in a equilateral triangle