Hi I'll forward to the group and see if anyone wants to adopt this project.
The attached ZIP file is on the wiki in the S-100 Utility folder Thanks! Andrew Lynch From: Neil Breeden [mailto:[email protected]] Sent: Sunday, October 12, 2014 12:06 PM To: Andrew Lynch Cc: 'Todd Goodman'; [email protected] Subject: Re: S-100 Utility board KiCAD files uploaded to wiki Guys, I've been able to verify the following work: - Port decoding for the UART - The UART - The 27C256 EPROM - The 32K RAM at U27 - I can toggle bits on the Printer port I have a version of my BASIC in ROM that works on the board using the on-board EPROM, RAM and UART for console I/O. Other functions such as the RTC, Extra RAM (U29 and U18) and MSX ports have not been verified. Issues with the board (Version 01) - MREQ Issue (see attached) - Need to replace NAND with NOR gates - I'm not convinced that the RESET circuit works reliability Neil Breeden [email protected] On Oct 12, 2014, at 06:23 AM, Andrew Lynch <[email protected]> wrote: Hi Todd I uploaded the S-100 Utility board KiCAD files. It occurred to me this morning they had not been uploaded previously. http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder <http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder¶m=S-100%20Utilit y> ¶m=S-100%20Utility Neil had debugged the board and it was probably nearly complete. It is probably close enough for a small batch of PCBs to hammer out the remaining issues. The S-100 Utility board along with an S-100 VDP and S-100 Z80 CPU board form a three board core full hardware MSX2 compatible system. Good luck! Thanks and have a nice day! Andrew Lynch -- 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.
