From your pics, it seems clear that the linked info about the Plus ROMs being located on the upgrade card is in error, but their being required makes sense. Check the sizes of the ROMs on the MoBo. If they're 32k each, they're original and nothing should work quite right if the article is correct in part. If they're both 64k, they've been upgraded to 512ke or Plus ROMs and you're good to go, AFAIK.
< tangential info that might prove useful mode >
I installed a similar NewLife board in my 512k, but I don't recall if it needed a ROM upgrade or not with any certainty. I think I remember buying the 800k FDD upgrade kit, which included the Plus ROMs by that point, that was the only way to get the ROMs at a reasonable price at the time. Check the FDD for info as to capacity, that might be how the ROMs were sourced for your MacRescue card. Hopefully someone else can verify the 800k FDD upgrade kit contents, be it internal or external FDD. That bit of info would support the linked article and my hazy memories of that first foray into Mac hacking about twenty years ago. I never used the original MoBo, BTW. I bought a used 128k MoBo for that test of my soldering skills, keeping the original as borked board backup. I was probably hoping the 128k board would be Killy Klip friendly, but it didn't turn out that way.
My card had RAM expansion, SCSI and TTL Video, which wasn't supported by the shipping drivers when I bought it. The upgraded board was destined for a Cat Mac when the Video Software was released if it didn't support spanning. I planned for it to stay in the 512k if it did. I think NewLife went under before getting the Video drivers to work, but the extra RAM was nice 2.5MB after NYMUG acquaintance at TekServe threw in four Keychains at no charge when I had the board troubleshot for some reason (likely my poorly developed soldering skills) or other. I don't remember hooking a hard drive up to it before I loaned it out to an aunt in law, but ISTR it having a second (800k?) external FDD. I can nail down the date I bought the the used MoBo, I saw the receipt for it and the original purchase of the used 512k/ImageBanger WC combo riffling through the files last night.
Basically, I spent $900 to get the BIG ImageWriter to use bi-fold size paper with ThunderScan back when scanners cost more than new Macs. The 512k for me to use at home was a very nice bonus. This wasn't excessive at the time, as I was waiting for a $10k vertical market MacSignMaker/SE/20/Radius_16 package to be delivered. My partner didn't have more than a passing qualm about the added expense of the 512k. The ImageBanger WC/ThunderScan combo had already figured into the budget and the 512k enabled me to do scanning and rough bitmap editing at home in the evening, to be vectorized the next morning.
I'll have another look at the file to see if I can find an invoice for the 800k FDD upgrade kit, that will nail that bit of info down quite nicely.
< /tangential info that might prove useful mode >
Anyway, I hope this somewhat OT rambling puts a few bits of info into perspective to help you in your MacRescue research.
< tangential info that might prove useful mode >
I installed a similar NewLife board in my 512k, but I don't recall if it needed a ROM upgrade or not with any certainty. I think I remember buying the 800k FDD upgrade kit, which included the Plus ROMs by that point, that was the only way to get the ROMs at a reasonable price at the time. Check the FDD for info as to capacity, that might be how the ROMs were sourced for your MacRescue card. Hopefully someone else can verify the 800k FDD upgrade kit contents, be it internal or external FDD. That bit of info would support the linked article and my hazy memories of that first foray into Mac hacking about twenty years ago. I never used the original MoBo, BTW. I bought a used 128k MoBo for that test of my soldering skills, keeping the original as borked board backup. I was probably hoping the 128k board would be Killy Klip friendly, but it didn't turn out that way.
My card had RAM expansion, SCSI and TTL Video, which wasn't supported by the shipping drivers when I bought it. The upgraded board was destined for a Cat Mac when the Video Software was released if it didn't support spanning. I planned for it to stay in the 512k if it did. I think NewLife went under before getting the Video drivers to work, but the extra RAM was nice 2.5MB after NYMUG acquaintance at TekServe threw in four Keychains at no charge when I had the board troubleshot for some reason (likely my poorly developed soldering skills) or other. I don't remember hooking a hard drive up to it before I loaned it out to an aunt in law, but ISTR it having a second (800k?) external FDD. I can nail down the date I bought the the used MoBo, I saw the receipt for it and the original purchase of the used 512k/ImageBanger WC combo riffling through the files last night.
Basically, I spent $900 to get the BIG ImageWriter to use bi-fold size paper with ThunderScan back when scanners cost more than new Macs. The 512k for me to use at home was a very nice bonus. This wasn't excessive at the time, as I was waiting for a $10k vertical market MacSignMaker/SE/20/Radius_16 package to be delivered. My partner didn't have more than a passing qualm about the added expense of the 512k. The ImageBanger WC/ThunderScan combo had already figured into the budget and the 512k enabled me to do scanning and rough bitmap editing at home in the evening, to be vectorized the next morning.
I'll have another look at the file to see if I can find an invoice for the 800k FDD upgrade kit, that will nail that bit of info down quite nicely.
< /tangential info that might prove useful mode >
Anyway, I hope this somewhat OT rambling puts a few bits of info into perspective to help you in your MacRescue research.