8087 in PCjr

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psergiu
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8087 in PCjr

Post by psergiu »

Anyone tried adding a 8087 in a PCjr ?
Based of stuff found on the interwebz, in can be either piggybacked on top of the 8088 with some pins unconnected and one diagonal connection or both 8088 & 8087 installed on a small PCB that plugs into the CPU socket (back in the day Legacy and one more company were selling those as add-ons)
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chuckphd53
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Re: 8087 in PCjr

Post by chuckphd53 »

Not sure if it needs bios support also...
“I never commit to memory anything that can easily be looked up in a book.” (AE)
psergiu
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Re: 8087 in PCjr

Post by psergiu »

Looks like it needs a 1-bit flip BIOS patch:

https://www.vcfed.org/forum/forum/genre ... -it/page3=
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chuckphd53
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Re: 8087 in PCjr

Post by chuckphd53 »

wow that would be an nice add, need to ck power consumption and heat dissipation...
But would really like to see this added..
“I never commit to memory anything that can easily be looked up in a book.” (AE)
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