Looks pretty darn good as is a David. Should mention that besides the TO-3 LM33K 5V regulator, the footprint also accommodates the Pololu & EzSCB switching regulators. I’m good for my usual 3 boards.
John From: [email protected] [mailto:[email protected]] On Behalf Of David Fry Sent: Sunday, May 31, 2015 9:08 AM To: [email protected] Subject: [N8VEM-S100:7136] New S100 Board Under Development - OPL3/Game/16550 Serial Hi Everyone, I recently mentioned in a recent post that I would be announcing a S100 board that I have been working on over the last five months or so. I have not yet come up with any name for the board so I currently refer to it by it's functionality which is aimed to add some multimedia functionality to the S100 PC platform. Basically the board provides Yamaha OPL3 (Adlib) sound card function, A IBM compatible Joystick/Game port, and a PC compatible NS16550 serial port. Each circuit function can be addressed via separate and independent 8 OR 16 bit port addresses so 8/16 bit port addresses do not have to be related to one another, in other words if the 16550 serial port is mapped at 16 bit port 03F8H the 8 bit mapping doesn't have to be F8H it can be some other address of your choice. I have completed and built the first prototype version as shown in the picture attached and I am pleased to announce that after correcting a few bugs that slipped through the net, the board seems to work as intended. My S100 system now has OPL3 Adlib sound under MSDOS (Mario game), and the joystick port and serial port have been tested by writing software under the Z80 platform (need to start learning x86 soon). The real purpose of this post is to gauge what level of interest there may be for this board in anticipation of a production release possibly in the later part of this year (2015), and also to extend an opportunity for a number of the more technical members to participate in a second prototype either by building up a board or by circuit analysis. I have uploaded the KiCad files (OPL3 Proto V1.zip) and _OPL3GAL.PDS file (for the GAL) to my N8VEM user folder for constructive comment/suggestions. http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder <http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder¶m=David%20Fry> ¶m=David%20Fry If for any reason you cannot get to these files email me off board and I will forward them to you. Best Regards David Fry -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
