exxos's Atari, Amiga & retro forum

is possible to buy somewhere this Mem68k ?

I bought some back in January from the developer on eBay.

https://www.ebay.co.uk/sch/mklfi/m.html ... pg=&_from=

Hi. I'm the one making and selling these, although I have little DRAM chips left. Some amount of v67 pcbs are left.

Is the 68030 on TF able to cache any of the 16-bit ram? Or the KS-ROM?

mkl wrote: 08 Mar 2020 11:27 Is the 68030 on TF able to cache any of the 16-bit ram? Or the KS-ROM?

By default is doesnt because it caused issues when caching chip ram (or 24 bit DMA area). But you can reprogram the cache control lines in verilog if you wanted to.Its as is is for compatibility purposes.

Personally dont think the cache on the 030 gives you much.

If it could make the "programmed IO" IDE transfer code loop run from cache and thus get speed on MMUless (no relocation of KS to fastest RAM) 68EC030?

mkl wrote: 08 Mar 2020 11:56 If it could make the "programmed IO" IDE transfer code loop run from cache and thus get speed on MMUless (no relocation of KS to fastest RAM) 68EC030?

Thats a pretty specific optimization for a single kickstart though? i'd rather let people customize as required. MMU 030s are really cheap too. like $9.

I had 68EC030 (RP40) in mind because I bought 4 pcs cheap on ebay auction.

Running code loops from preloaded instruction cache, I think, would be much faster than loading every instruction word from slow memory every time.

mkl wrote: 08 Mar 2020 11:56 If it could make the "programmed IO" IDE transfer code loop run from cache and thus get speed on MMUless (no relocation of KS to fastest RAM) 68EC030?

You can load the scsi.device in fast ram and that will give you some IDE speed up even without fastrom.