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Post AeNiTQStZtVRqg1ovI by [email protected] |
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More posts by [email protected] |
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Post #AeNiTPyPPF7UK7lTP6 by [email protected] |
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This is the Brainstorm accelerator for the Mac Plus. It plugs into a socket cli… |
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Post #AeNiTQ3186o2YPv9aS by [email protected] |
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I picked up this accelerator in a somewhat roundabout way. Months ago at the El… |
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Post #AeNiTQ7GsID0lbuYDY by [email protected] |
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Long story short, we swapped logic boards and indeed, he got a working Mac out … |
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Post #AeNiTQBWcTbyyntwqe by [email protected] |
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My Brainstorm Plus chirps out the signature "boot beep" at startup, b… |
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Post #AeNiTQFmMf0xBztLTk by [email protected] |
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Armed with my rudimentary electronics skills, I cracked open my Plus to investi… |
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Post #AeNiTQJg8A8LO5iSYa by [email protected] |
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As I mentioned, the main board of the Brainstorm clips to a socket that straddl… |
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Post #AeNiTQNvsLXJbHhrBg by [email protected] |
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Elsewhere on the Mac Plus logic board, the TSM-- a PAL16R4A-- is replaced by it… |
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Post #AeNiTQStZtVRqg1ovI by [email protected] |
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With the Brainstorm installed, each of the Plus's two ROM chips has a blue.… |
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Post #AeNiTQXVIlC04yBV6e by [email protected] |
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The main Brainstorm board itself consists of four ICs: a Toshiba TMP68HC000P16 … |
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Post #AeNiTQbl2wayIAAtjk by [email protected] |
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I beeped out the two chips on the underside and I strongly suspect they are ROM… |
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Post #AeNiTQfeoRiMUG00oa by [email protected] |
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@foone do you have any gear that can dump these? |
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Post #AeNiTQjCbGYAfFeqLA by [email protected] |
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@blitter I don't think so. I'd have to try to build something out of a … |
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Post #AeNiTR3lMozrh1HGO8 by [email protected] |
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Likewise, I suspect the ASX-6 chip might be a PAL20L8 based on the pin count an… |
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Post #AeNiTROg73j8jt3xzM by [email protected] |
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Most of how the two SOP-28 chips are wired to the 68000 makes sense to me with … |
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Post #AeNiTRjarISPmkqfaa by [email protected] |
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Finally, I'm not sure why the Brainstorm board has a pigtail resistor to th… |
