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ISA USB board

Malc said:
Can you post a pic of your ISA - USB adapter ?

@sorphin Can you also post a pic of your ISA - USB adapter ?

If you had CD's with your adapters does it contain the schematic's of your adapters and do they match the adapter's you have ?.

I have been looking around and there seem's to be 2 or 3 different variations of these Chinese ISA - USB adapters going around.
Click to expand...
mine is this one:

It did come with the CD it does not match any of the schematics because it actually does it slightly differently chipwise there's no pal.
 

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I just tried this D5 driver with my Lo-Tech variant of the ISA - USB controller and it WORKS!!! :)
I will do more testing later, Initial results i'm very impressed, 125 - 150 Kb/s using a 2Gb flash drive and my XT 5160.
Well done FreddyV
 
Malc said:
I just tried this D5 driver with my Lo-Tech variant of the ISA - USB controller and it WORKS!!! :)
I will do more testing later, Initial results i'm very impressed, 125 - 150 Kb/s using a 2Gb flash drive and my XT 5160.
Well done FreddyV
Click to expand...
Thanks.
I did not expect it to be as fast on a 8088 4mhz, I did the test on a 8086 8Mhz.

The Best with it is that;
Speed can still be improved.
I can add mounting of multiple partition.
As I have the full source, anything is possible.
This chip also support any other USB device , I will work on mouse support. 😀
 
I forgot, I replaced the stock 8088 with a Sony V20 a few day's ago, I'll switch them back and test on the 8088.
I wonder if this driver will work with the CH376S chip ??
 
I fitted the stock 8088 back in and re-ran the test's, now 115 - 140 Kb/s with the stock 8088 and using a 2Gb flash drive, A great improvement over the original driver, Tested my other 1 / 2 and 4Gb flash drive's, SD and CF cards, All fine and passed the mediatest, Ran a few small DOS programs from USB drive with no problems :)
 
Malc said:
I fitted the stock 8088 back in and re-ran the test's, now 115 - 140 Kb/s with the stock 8088 and using a 2Gb flash drive, A great improvement over the original driver, Tested my other 1 / 2 and 4Gb flash drive's, SD and CF cards, All fine and passed the mediatest, Ran a few small DOS programs from USB drive with no problems :)
Click to expand...
For reference my tests have all been stock.
 
Malc said:
I fitted the stock 8088 back in and re-ran the test's, now 115 - 140 Kb/s with the stock 8088 and using a 2Gb flash drive, A great improvement over the original driver, Tested my other 1 / 2 and 4Gb flash drive's, SD and CF cards, All fine and passed the mediatest, Ran a few small DOS programs from USB drive with no problems :)
Click to expand...
my results on the 8Mhz PC'S Limited Turbo PC with Aliexpress card and D5 driver: (lil bit faster than my MFM drive )

IMG_20220527_173403__01.jpg
 
Malc said:
A great improvement, Here's hoping for more to come.
Click to expand...
yeah... bootability... even if the on board rom socket is a joke... i habe extra sockets on these 8088 boards and doublerom isa cards for the ones that don't.. (basically > 286) and I don't have to source cf cards for an xtide card i don't have. lol I have usb sticks.
 
With the write code more optimized (8086 8Mhz)
I will of course do a v20/v30 80286 version.
I also think that doing this :
in al,dx
Xchg ah,al
In al,dx
STOSW
will be faster....
If we build a board and put the A1 on the chip instead of the A0 we can reduce the code to
IN ax,dx
Xchg ah,al
STOSW
I am even not sure the exchange is needed.
 

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I tried the D5 driver on a Sharp PC7100 (8086 @ 8Mhz) with the ISA to USB card in the CE700E expansion chassis. There is a small improvent over the stock 1.9 driver.

This is with the stock 1.9 driver:
IMG_4704a.JPG

And the D5 driver:
IMG_4705a.JPG

Thank you FreddyV for improving the drivers for this card.
 
BlaBla1985 said:
I tried the D5 driver on a Sharp PC7100 (8086 @ 8Mhz) with the ISA to USB card in the CE700E expansion chassis. There is a small improvent over the stock 1.9 driver.

This is with the stock 1.9 driver:
View attachment 1241800

And the D5 driver:
View attachment 1241802

Thank you FreddyV for improving the drivers for this card.
Click to expand...
You have a strange machine. Read change from 18kbps to 180. Same CPU but faster with the 1.9 and slower with mine. What is special with it ?
 
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FreddyV said:
Same CPU but faster with the 1.9 and slower with mine.
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no, your driver is slightly faster then the stock 1.9

It's an old portable from sharp. but it has no normal ISA bus inside, it needs an expansion chassis for that.

IMG_3904a.JPG
like this, the tophalf is the portable computer, the bottom half is the expansion chassis. there is an interconnect under the computer and a interface board in the chassis that does the bus decoding and stuff for the isa slots. i think it looses a lot of speed due to the buffering that happens on the interface board.
 
sorphin said:
yeah... bootability... even if the on board rom socket is a joke... i habe extra sockets on these 8088 boards and doublerom isa cards for the ones that don't.. (basically > 286) and I don't have to source cf cards for an xtide card i don't have. lol I have usb sticks.
Click to expand...
A working boot bios would be very useful. :)
 
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