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Thanks Eric,
It's really funny to see a little 8 pin chip hold 4 Floppy disks. There's even an led that comes on when the chip is selected, so it looks exactly like the disk activity led. Now I just have to learn more about CP/M :) Cheers, Josh From: er...@osmancrew.com To: n8vem...@googlegroups.com Subject: RE: [N8VEM-S100:1597] IMSAI 8080 CPU card replacement Date: Sun, 28 Apr 2013 21:40:29 -0700 J
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That's
awesome! Nice work!
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Eric
-----Original Message-----
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com]On Behalf Of Crusty OMO Sent: Sunday, April 28, 2013 9:20 PM To: n8vem...@googlegroups.com Subject: [N8VEM-S100:1596] IMSAI 8080 CPU card replacement Hi Andrew,
Just thought you would like to see what I've done on one of your prototyping boards. It's a replacement CPU card for an IMSAI 8080. It uses an 8080A and has the 16 pin socket to connect to the Front Panel. I put 64K of RAM on the same card and a PIC microcontroller to provide Serial I/O, Floppy Disk emulation on a 8Meg flash chip and a Boot strap program. It can boot up into CP/M 1.4 all on the same card. I did this because many of the other cards of that era are flakey and I wanted to get the IMSAI 8080 computer at the PC Museum in Brantford, Ontario working. If anyone wants the full schematic & firmware, just let me know where to upload it. :)J -- 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 n8vem-s100+...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- 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 n8vem-s100+...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. |