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1

Small amounts (around 10 chips) are available at some manufactureres for prices of ~5..10k$ per batch. Here http://www.nedopc.org/forum/viewtopic.php?f=79&t=218 is the report of an enthusiast who successfully manufactured his own trinary logic chips in such a way on 0.5um CMOS process. I guess that NMOS-style schemes are still available in any CMOS ...


1

Similar processes/equipment will likely still exist for SSI and especially analog ICs - you could not shrink either of these indefinitely without messing with their robustness/current handling capacity, and analog parts would suffer terrible noise, precision, and drift issues in addition....


16

It should be feasible to manufacture NMOS-process parts using 0.6µm equipment that is still in current use. WDC's W65C02S, as well as their other current products, are made at TSMC on 0.6µm, though they are CMOS chips. You would need to obtain examples of the original masks, have them converted to a format usable by the newer equipment (probably whole-...


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The original IBM PC and AT designs allocated 10 bits for I/O addressing, and only decoded address lines A0-A9 for on-board I/O devices. However there was no physical limitation to 10 bits, so a card could use A10-A19 so long as it didn't clash with the aliases of 10 bits cards or motherboard devices. So yes, the game-port card has aliases at 601h etc., ...


7

This looks like a large digitizer board (a.k.a. digitizer, digitizing tablet, graphics tablet, and variations) with a map overlaid on it. They were very popular in CAD (computer-aided design) applications in the '80s and early '90s, and are, to my surprise, still available today. They are quite useful for any application which requires precise coordinate ...


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