13 November 2023, 23:07 | #1 |
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What is the board next to the bottom expansion slot on some rev6 a500s?
Sometimes I encounter photos of rev6 a500 motherboards with a small board next to the bottom expansion slot such as the one here:
https://i.ebayimg.com/images/g/jl8AA...Nf/s-l1600.jpg What was this? and how come not all rev6 motherboards have this? |
14 November 2023, 12:50 | #2 |
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It helps the 8371 Agnus refresh the 4 bit RAM chips. It is not fully compatible with the rev 6 motherboard otherwise.
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14 November 2023, 14:27 | #3 |
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Wow, I've never seen this.
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14 November 2023, 21:50 | #4 |
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15 November 2023, 08:08 | #5 |
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Yeah.. To pull a number out of a hat, 98% of all rev 6s shipped with an 8372 and only a small batch (in comparison) had the old agnus + the refresh bodge tower.
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