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Re: CB030, A 68030 SBC for hobbyists [message #7496 is a reply to message #7493] Sat, 11 April 2020 22:13 Go to previous messageGo to previous message
explodinglemur is currently offline  explodinglemur
Messages: 4
Registered: March 2020
Junior Member
plasmo wrote on Sat, 11 April 2020 06:55
Added instructions on how to modify CF interface to 16-bit. Also added the corresponding CPLD equations. Still need to upload the CP/M68K BIOS, modified memory map, and modified schematic.
https://www.retrobrewcomputers.org/doku.php?id=builderpages: plasmo:cb030:cb030_rev1:16-bit_cf_upgrade
Bill
I'm incorporating those changes into the 4-layer design I messaged you about. With pin 24 on the CPLD repurposed for the CF card interrupt, I assume the memory size selection jumper is deprecated?

Also, probably stupid question on the SDRAM, how does addressing/mapping work out with RAS0/RAS2 and RAS1/RAS3 tied together? I can lay out PCBs, and I can write some code, but I've got a big knowledge gap in the middle I'm trying to bridge Smile
 
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