Re: USB ISA cards?
Posted on 2022-07-30, 11:09
No as it will repeat throughout the 1MB address space.
Re: USB ISA cards?
Posted on 2022-07-20, 06:03
Should be!
Re: USB ISA cards?
Posted on 2022-07-19, 23:08
The idea is to add the support for it to the XTIDE Universal BIOS.
Re: USB ISA cards?
Posted on 2022-07-19, 22:44
Can I use one of these as a secondary disk that I can access from windows 3.11 or 95 that is booting from a internal hard drive? Also, where is the best place to buy these? Are there more than one version? I’m not sure if anyone has tested the alpha BIOS or driver(s) under Windows yet. But they are …
Re: IDE support for more than 8 GB HDD storage on Biostar MB-8433UUD
Posted on 2022-07-16, 10:03
So the table on the Lo-tech website is also wrong? https://www.lo-tech.co.uk/wiki/Lo-tech_8-bit_ROM_Board#32KB_Address_Mapping Or is there another explanation for this? The XTIDE configuration and EEPROM writing software for DOS also indicate these same truncated addresses. So you are saying that …
Re: USB ISA cards?
Posted on 2022-07-15, 12:48
The board will have ISA A0 routed somehow to the CH375 pin 8 (A0). That connection would need to be cut and a jumper wire run from CH375 pin 8 to ISA A1 instead. The ZWS function is dependent on additional logic.
Re: USB ISA cards?
Posted on 2022-07-15, 06:49
So, does it make sense to use the new 286 driver on a 486DX4-100? Will it work and give faster speeds? Absolutely it does, and if you are using the Lo-tech card it will give you much better throughput due to 1) the port mapping enabling 16-bit IO (rep insw) and 2) the ZWS option. It will need …
Re: Tandy 1000, Lo-Tech XT/IDE, CF and DOS 3.x
Posted on 2018-10-30, 06:38
http://www.xtideuniversalbios.org/svn/xtideun … rsalbios/trunk/
Re: Tandy 1000, Lo-Tech XT/IDE, CF and DOS 3.x
Posted on 2018-10-29, 20:42
Low level format is defo worth a shot.
Re: Tandy 1000, Lo-Tech XT/IDE, CF and DOS 3.x
Posted on 2018-10-28, 20:25
Incidentally the XTIDE Universal BIOS is at: http://www.xtideuniversalbios.org
Re: Dual CPU Socket 5/7 Boards
Posted on 2018-10-14, 10:47
I used to run NT4 in production on SMP Pentiums, the second chip meant we could enable NTFS compression but keep the file server performance pretty much the same. Cost effective and simple disk capacity upgrade 😀
Re: Lo-Tech ISA ROM Board trouble....
Posted on 2018-10-07, 16:09
Good stuff, which main board are you testing? It’s certainly possible in 5160, YMMV with others...
Re: ISA card with ROM at F000:0 ?
Posted on 2018-10-06, 10:43
I had chance to have a quick look at the 5150 schematic. To run the system BIOS from the ISA ROM board, a small mod is needed as the board will drive the ISA bus with u13 for any address in F segment. It looks like a solution is to bend out pin 5 on u27 (74LS02) and jumper this to 5v via a 10k …
Re: ISA card with ROM at F000:0 ?
Posted on 2018-10-04, 18:58
Predator99 wrote: I removed the mainboard BIOS, set the DIPs to F800 and...nothing 🙁 This could be a motherboard architectural limitation, in the PC/XT board for example the board will work at F000h only in slot 8 because the system board is hard wired to access the BIOS on that side of the bus.
Re: Lo-Tech ISA ROM Board trouble....
Posted on 2018-10-04, 18:39
Sorry to hear you are having problems! This card is super simple so really the problem can only be the comparator or the pull ups. I would suggest bench checking the comparitor input pins with a multimeter, with the card outside of the machine, testing from exposed comparitor IC leg on component …
Re: The Tandy 1000 ISA sound card brainstorm thread.
Posted on 2016-12-15, 19:30
Hi All, sorry I've not been following this thread (only the vcfed one). The issue with the input is that the PC speaker uses an open-collector drive. The level can be bought up to where it should be by adding a pull-up on the speaker audio input, something like 30 ohms or so. Hopefully that will …
New Lo-tech 8-bit IDE Adapter
Posted on 2016-07-21, 06:25
Hi All I've updated the Lo-tech 8-bit IDE adapter to rev.3, the main change being it's now compatible with the Keystone 9202 steel ISA slot bracket. There are also now two IO port options, 300h and 320h. More info here: https://www.lo-tech.co.uk/8-bit-ide-adapter-rev-3/
Re: Project MPU (bringing MPU-401 BOBs back to life)
Posted on 2015-07-19, 17:54
Hi, thanks for posting the links to my card above (I am Lo-tech site owner). This card was actually developed specifically for a well known musician, the objective being to run multiple MPU-401's on an XT (in his studio). It's a simple board so I thought it may as well be the best and most flexible …
Re: Anyone got the XT-CF card working on an XT 8086?
Posted on 2015-07-19, 17:49
The boot sector needs to be replaced; it contains code that cannot be run on XT processor. Either wipe the CompactFlash card altogether using Lo-tech WIPEDISK utility, or run FDISK /MBR from a DOS 6.22 boot disk (floppy).
Re: The Tandy 1000 ISA sound card brainstorm thread.
Posted on 2015-04-19, 21:25
I've not forgotton about this, just been struggling with time but also the 3.5mm socket is proving a PITA. If anyone has a product with a published Eagle layout, that would be very helpful and I can then get this finished 😀
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