Received: from ATT1.Mankato.MSUS.EDU by karazm.math.UH.EDU with SMTP id AA23822 (5.65c/IDA-1.4.4 for ); Fri, 11 Oct 1991 16:37:13 -0500 Received: by att1.Mankato.MSUS.EDU (5.59/25-eef) id AA03981; Fri, 11 Oct 91 16:28:11 CDT Date: Fri, 11 Oct 91 16:28:11 CDT From: Jay A. Carlson Message-Id: <9110112128.AA03981@att1.Mankato.MSUS.EDU> To: jmunkki@hila.hut.fi Cc: glove-list@karazm.math.UH.EDU In-Reply-To: Juri Munkki's message of Fri, 11 Oct 1991 19:41:23 +0200 <199110111741.AA01040@hila.hut.fi> Subject: Macintosh... > A 68HC11 board with a SCSI interface would probably be the optimal > solution. I could connect the sega glasses and the powerglove to this > hardware box. I assume that at least some versions of this processor > have some EPROM and RAM, so the board would need a clock crystal, > a SCSI-chip and a VIA. The 6522 VIA has a shift register that could > easily be used to read the glove. The other I/O lines could be used > to control the Sega glasses. Unfortunately, the versions of the HC11 with EPROM instead of mask-programmed ROM are still quite pricey. If you plan on bringing out the bus to the SCSI chip anyway, hooking an external EPROM up is more cost-effective. The HC11 also has a SPI, Serial Peripheral Interface, on-chip. It's a more general version of the shift register of the VIA. There also should be plenty of I/O lines on-chip left over to drive your glasses. If we remove the VIA, the parts list is now an HC11, a crystal, a 2764, a latch and maybe a '138 to drive the bus, and the SCSI controller. The same hardware, substituting an RS-232 line driver for the SCSI chip, could be used for a universal serial glove interface. I don't know that much about the Apple Desktop Bus, but I know that HC11 series chips live in some ADB devices. And finally, you can run data out the serial port at MIDI rates, making the hypothetical board of some interest to musical types. I wonder how much demand there'd be for one of these boxes.... // Jay Carlson \X/ nop@att1.mankato.msus.edu To subscribe to the MC68HC11 list, email to mc68hc11-request@quack.sac.ca.us.