Subject: Re: [stella] Cartridge PCBs have arrived From: Erik Mooney <erik@xxxxxxxxxx> Date: Tue, 08 May 2001 01:55:19 -0400 |
On Tue, 08 May 2001 00:32:18 -0400, you wrote: >The board uses a 7404 Hex Inverter (14-pin DIP) to invert the address/chip >select line. I designed the board specifically for use with 4K ROMs. 2K >should also work, but anything larger than 4K (2732s) will not work. I'm no electronics whiz, but I recall someone mentioning that the inverter for the chip-select line could be done with a single transistor, no need for a (comparatively) bulky and expensive 14-pin DIP chip. Based on my sketchy knowledge, I think that's correct. Anyone? Wilkson? - Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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