Re: Lo-Tech ISA ROM Board trouble....

Posted on 2018-09-23, 20:48

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for your feedback! Nothing to hide on the backside: But I have to admit, some points look "weaker" on the photo than with my eyes: IMG_9711r.jpg I also came to the conclusion that the only possibility is the comparator. As written, I already tested another from the same lot. In the meantime …

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Re: 386 DX 40 or DX/DXL 40?

Posted on 2018-09-22, 21:15

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Too lazy to install a HD controller at the moment for diagnostics...but there is a 32MHz crystal, therefore it should run at 16MHz with all CPUs.

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Re: 386 DX 40 or DX/DXL 40?

Posted on 2018-09-22, 21:00

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Before disassembling again... Filename IMG_9704r.jpg File size 1.74 MiB Views 344 views Filename IMG_9705r.jpg File size 1.86 MiB Views 344 views ...Am386 DX/DXL-40 also no problem 😀

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Re: 386 DX 40 or DX/DXL 40?

Posted on 2018-09-22, 20:43

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi guys, I was wondering: • Will Am386 DX(DXL)-40 work on any 386 motherboard? I'm quite familiar on 486 motherboards, but I know nothing about 386 mobos bus limitations. Took the opportunity and tested this JATON 386-DX-40 CPU module I got some months ago... IMG_9699f.jpg IMG_9702b.jpg ...in a …

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Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Posted on 2018-09-22, 16:46

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by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did some more playing with that. I didnt find out the reason for the conflict between the sems.sys and XT-IDE. Both use different I/O ports and memory areas. Really strange. But: Figured out my "2M-EMS GA-229"-card is fully compatible with the DFI Rambank! Also the EMS-mode and the drivers are …

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Lo-Tech ISA ROM Board trouble....

Posted on 2018-09-22, 12:41

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I open a new thread as I think I need some assistance with my Lo-Tech ISA Rom-board... https://www.vogons.org/viewtopic.php?f=46&t=62065 Summarized: Unfortunately I didnt see I got an Rev.3 https://www.lo-tech.co.uk/wiki/Lo-tech_ISA_ROM_Board while ordering parts for the older one. https://www.lo- …

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Re: ISA card with ROM at F000:0 ?

Posted on 2018-09-21, 20:14

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by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Think I have found the reason. My card behaves quite "unusual". Put it in my 286 and played with the jumpers while watching with debug.exe where the ROM appears. Regardless of the Jumper setting, it is at E800:0 in an 32KB window. Only when switching J5 it goes to C800:0. Didnt notice that as the …

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Re: ISA card with ROM at F000:0 ?

Posted on 2018-09-21, 14:48

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by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The PC 5150 decodes the top 128KB for onboard ROMs. I'm not clear on whether this prevents a memory access from occuring on an expansion card. Does it work at $E000, $E800, or $F000? Maybe you could pull out U64 (74LS20) and put a pullup resistor on pin 6 /rom_address_select I didnt test in the …

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Re: ISA card with ROM at F000:0 ?

Posted on 2018-09-19, 20:46

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by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Now I received and assembled my Lo-Tech board. IMG_9692.JPG Unfortunately I didnt see I got an Rev.3 https://www.lo-tech.co.uk/wiki/Lo-tech_ISA_ROM_Board while ordering parts for the older one. https://www.lo-tech.co.uk/wiki/Lo-tech_8-bit_ROM_Board I have the following differences: - SN74F521N …

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Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Posted on 2018-09-09, 09:57

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

To show what you can do with it ;-) Put a card in my main 286 system with a Suntac ST62 board. It has 1024 kb onboard (can be extended up to 4096 kb, but I am too lazy ;-) ) The RAM above 640 kb can be configured as EMS or XMS with a DIP switch with the ST62 chipset (also possible with many other …

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Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Posted on 2018-09-09, 08:32

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

it's not uninteresting, just no hardware here to play with; would You be able to test how speed is influenced by isa? access times are of interest too. i understand that this works without drivers only on 286, right? Benchmark would be interesting. Do you know a Software...? It needs to draw a …

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Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Posted on 2018-09-08, 18:18

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by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Its attached in my initial post, testx33.zip

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Re: I recently found this hardware, AKA the Dumpster find thread.

Posted on 2018-09-08, 17:16

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by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My new Monitor :neutral: IBM 8503 Monochrome Display IMG_0160r.jpg Saw it on the street for garbage collection very close to me. "I dont need further monitors". Walked home. But an IBM? Its going to be dumped if I dont do anything! Came back with my car 2 hours later and was still there :neutral: So …

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Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Posted on 2018-09-08, 14:36

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I am surprised nobody else is interested in this topic. Maybe you trashed your cards long ago and now you are annoyed :-p :-p :-p This card is more difficult: FCC ID: FIF48G PE505-16M ZERO MADE IN TAIWAN IMG_0157.JPG SW1 SW2 123456 12345678 With 256k chips: 11111x 11x1xxxx 1,0 M 11111x 1111xxxx 1,00 …

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Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Posted on 2018-09-07, 21:56

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Same method, next card :-) "2M-EMS GA-229" IMG_0155.JPG Left block ("SW2") 1-7 correspond to DFI AT-RAMBANK SW2 S1-S7 for starting adress selection. SW2-8: off Right block ("SW1"): set all to on ...and you get 2MB XMS :-) And the end I will combine all my cards to get 8MB in total in a 286 ;-) EDIT: …

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Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Posted on 2018-09-07, 19:35

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Indeed thats easy! And I think that correlation is valid for all cards of this type. You only need to know where to start. And "Extended Memory Tester" gives the answer. Try some jumper settings, note the starting adress, compare with the DFI manual and you know the correct setting for your setup. …

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Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Posted on 2018-09-07, 17:51

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Rebooted...and yes, the ISA RAM is detected by the BIOS and also by himem.sys! IMG_0141.JPG IMG_0142.JPG Thats it. Rather easy :-) Will also try with my other cards, hope it will also work that way. And: Usually there is no need to use the EMS mode. You can use the card as XMS and configure the …

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ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Posted on 2018-09-07, 17:49

by

by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think what I have done here is really cool - I should keep it for myself to buy all these unneeded cards before publishing ;-) But thats no fun... So...there seem to be many of ISA XMS/EMS Memory Extenstion / Expansion cards cards around. They are quite expansive when there are Drivers and …

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Re: What retro activity did you get up to today?

Posted on 2018-09-06, 20:40

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by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Typically a function of the BIOS itself; is it AMI, Award, Erso, or Phoenix? You could also try the "stuck key" trick and see if it tells you what to press when there's a stuck key-- or even remove the keyboard to see what it says to do. The Bios is from Phoenix - on post it says "Phoenix 80286 ROM …

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Re: Bought these (retro) hardware today

Posted on 2018-09-01, 17:10

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by Predator99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Still need to find out what this one is for: IMG_9953.JPG Looks a little bit like this one, may give you an idea what it may be: https://www.ebay.com/itm/CORNERSTONE-PC164I-DUALPAGE-120I-IMAGE-ACCEL-ISA-VIDEO-ADAPTER-7112451-016-/111483121167 Yes, indeed. FCC ID H2T6311760: Cornerstone Imaging Inc …

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