16 ms·
Is there any change to bottleneck. Like previously it was storage, now is it RAM or CPU?
by ramshanker 9y ago
Is there any change to bottleneck. Like previously it was storage, now is it RAM or CPU?
- jschwartzi 9y agoThe SSD might be faster than the RAM. I'm betting it's going to be the CPU.
- rocky1138 9y agoThe controller on the SSD is probably faster than the CPU.
- MBCook 9y agoIt could still be the IDE interface or the ISA bus. Was the ISA bus as fast as the CPU/RAM on the 5150?
- wtallis 9y agoThere's a post[1] about optimizing DMA performance for a ISA CompactFlash adapter. Port-mapped IO is quoted at around 170KB/s, up to 420 KB/s for DMA transfers of one sector at a time, to 530KB/s on an 8088 with a CF card that supports multi-sector transfers. This is a but faster than the random read speed of the slowest SATA hard drive I have around (a 160GB 5400RPM 2.5" Seagate pulled from a portable USB/Firewire drive). So there are definitely some 16-bit PCs that are fast enough to measure an improvement from Flash storage, but the original 5150 is probably pretty close to that line. [1] https://www.lo-tech.co.uk/xt-cfv3-dma-transfer-mode/ https://www.lo-tech.co.uk/xt-cfv3-dma-transfer-mode/
- CodeWriter23 9y agoWe got away with overclocking our XT's to 7.66Mhz with no problems, just swap in a different crystal oscillator. Then swap the 8088 with an NEC V20 for I think about another 20% boost.
- deleted 9y ago[deleted]