Rich ard wrote on 2023-04-22, 08:54:Thanks for your question.
I put the CH375286.SYS 3,387 byte file in the C:\WINDOWS\SYSTEM directory.
You need to use the full and exact path in the config sys because this is before the path environment variable gets set. You need to specify C:\WINDOWS\SYSTEM\CH375DOS.SYS
You might also consider doing a “loadhigh” to save conventional memory
First thanks for your help Weedeewee and douglar.
I found the problem
I originally followed this path
First attachment down the page
Instructions
------------
Add a line in the CONFIG.SYS :
DEVICE=CH375DOS.SYS @260 %0 This was my mistake.
I changed it to DEVICE=CH375286.SYS @260 %0 and it's working
Thanks for the help guys
Ohhh! Thread referenced!
https://arstechnica.com/gadgets/2023/07/going … -like-its-1981/
I discovered that someone on the VOGONS forum (one of several invaluable retro-tech resources I bumped into on my journey) named FreddyV had written a modified driver to improve the CH375S's transfer speeds. That driver comes in several versions optimized for different x86 processor generations.
Big thanks to FreddyV, getting 10x the throughput with his driver!
Anyone know where I can buy a bracket? I don't have a 3D printer and I can't even find an STL for it either!
16ShadesOfOrange wrote on 2023-07-19, 00:21:Big thanks to FreddyV, getting 10x the throughput with his driver!
Anyone know where I can buy a bracket? I don't have a 3D printer and I can't even find an STL for it either!
You are welcome 😀
Been using the FreddyV setup with my Chinese CH375 card for a few weeks.
Using an IBM Model 30 PS/2 with the NEC V30 CPU upgrade.
ISA>USB - CH375 / FreddyV Drivers
Write Speed : 240.98 KB/s
Read Speed : 282.49 KB/s
8k Random, 70% read : 12.7 IOPS
Sector Random read : 21.2 IOPS
Compared to
PS2XT2SD by CallinElvis
Write Speed : 138.33 KB/s
Read Speed : 248.69 KB/s
8k Random, 70% read : 7.2 IOPS
Sector Random read : 9.7 IOPS
CheckIt on PS2XT2SD
283.0K/Seconds - Determine Transfer Speed (C: 130K blocks)
1.5ms , 1.5ms - Determine Average and Track Seek Times
My hard drive was dead dead.. platters scraped to hell. I have no idea what the normal speeds of the factory 20mb ESDI drive is to compare to.
Thus why I got the PS2XT2SD which in of itself has worked great too.
No idea even what the theoretical top speed of the ESDI controller on this Model 30 even is. I'd like to think the PS2XT2SD IS maxing it out.
I would really love to get a hold of A good CH375 card where it has A working bootable ROM chip on it since the China ones are missing some hardware for that to work properly. ( odd they have the socket added for something that can't work )
Btw, this was the slot cover A friend made for me for my China CH375 card.
https://www.thingiverse.com/thing:6204804
I search CH375 and found nothing on Thingiverse. Then after all was said and done, found that "ISA USB" brought up results! Ooops..
But whatever... I like it and it worked well for me 😀
douglar wrote on 2023-03-08, 20:15:Also, has anyone tried putting a header here and making a front panel usb port?
Late reply, but I just added a header to the card and it works like a charm 😀
