Re: HardMPU, anyone?
Posted on 2020-04-24, 01:51
Tada! The MT-32 works! With the Micro 8088, HardMPU works on first cold boot unlike the Xi 8088 where I had to restart once for it to start working. Awesome!
Re: Xi 8088 by Segey Kiselev
Posted on 2020-04-19, 16:06
The Xi-808088 has most peripheral ICs swapped with part numbers having higher specs. Since then, I've been using the Micro 8088 with no hiccups. CPU Clock Frequencies 4.77, 7.16 and 9.55 work without a hitch. 9.55 really screams with this beast at 2.45x better than a plain jane XT. Up next is to …
Re: Xi 8088 by Segey Kiselev
Posted on 2020-04-18, 06:30
Congratulations! Now you can even run Windows 3.0 on it with some useful amount of RAM! :) Greetings, Not only that! After adding the HardMPU from ab0jt, it's rockin' like a hurricane. It's been a joy playing midi data through it to the Roland SC-55 for the last 5 or so hours with no hiccups. It …
Re: Xi 8088 by Segey Kiselev
Posted on 2020-04-18, 06:18
peda126 wrote on 2020-04-01, 23:17: Hi, […] Show full quote Hi, I just finished my Xi 8088 build. Does anybody know where i can find a POST code overview? thanks Peter Hello Peter, Look at POST checkpoint codes Sincerely, William
Re: HardMPU, anyone?
Posted on 2020-04-17, 19:06
That board is pretty stellar. Is that the modern XT board? Hello bjwil1991, It is the modern XT Xi-8088 from Sergey's Projects . The following have been assembled and working: MicroATX ISA Backplane Xi-8088 from above XT-CF-Lite V4 ISA Floppy Disk and Serial Controller ISA OPL2 Card Lo-tech 8-bit …
Re: HardMPU, anyone?
Posted on 2020-04-17, 02:07
Greetings, I have been having a heck of a time getting this board to cooperate but I finally have it going. After one magical reboot it started working. Multiple times I've used the MiniPro (two different ones) to program two different 1284P's (which I've used both in a current project) and double …
Re: HardMPU, anyone?
Posted on 2020-04-11, 05:59
Greetings, My inventory has some of the parts and the rest are on order. Right now, I have been having fun programming the ATMEGA1284P with my own programs until I get ready to use it with the HardMPU. The AVR DIP 40 Programmer by Kamprath I received while working with the Z80 RC2014 and some add- …
Re: HardMPU, anyone?
Posted on 2020-04-01, 17:57
Greetings, My inventory has some of the parts and the rest are on order. Right now, I have been having fun programming the ATMEGA1284P with my own programs until I get ready to use it with the HardMPU. The AVR DIP 40 Programmer by Kamprath I received while working with the Z80 RC2014 and some add-on …
Re: Xi 8088 by Segey Kiselev
Posted on 2020-03-08, 23:13
Thank you Bloodycactus and Root42. I found the tool I needed! Utilizing v2.2 of USE!UMBS from http://www.vcfed.org/forum/showthread. ... a-XT/page3 and DOSMAX21, I was able to use C800-F000 and use upper memory.
Re: Xi 8088 by Segey Kiselev
Posted on 2020-03-08, 08:57
The XT IDE CF Lite works like a charm. Most important task I had to do after removing the non dos partitions was execute “FDISK /MBR” after creating the primary and making sure it was active. Loaded a bunch of programs to it and King’s Quest was in all of its glory, haha. I plan to assemble the OPL2 …
Re: Xi 8088 by Segey Kiselev
Posted on 2019-12-18, 08:47
I finally formatted 4/4 MFM Miniscribe 3425 drives, but one had an issue. I do have 3 working. I now have two of them in the case. My next issue is a case that has the micro atx mounts so that I can use all 8 slots, but that'll be hard to find. Going to have to mod this case. But it is working out …
Re: Xi 8088 by Segey Kiselev
Posted on 2019-12-18, 06:20
Greetings everyone! After a bit of remembering how the MFM cables worked and the WD1002A-WX1, I also realized, someone had put a WX2 bios in the WX1 controller. So I erased it with the UV lamp and burned the Bios Super Formatter v 2.4 F300 and setup the Miniscribe 3425 drives and all went well. With …
Re: Xi 8088 by Segey Kiselev
Posted on 2019-12-13, 11:19
Hello Wiretap. Glad to see someone else building the Xi8088. I hope your build goes as well as mine. It has been much smoother than most. Creating an ms-dos boot disk brought back memories. I forgot about that. Next up is the WD MFM controller for my 20MB drives.
Re: Xi 8088 by Segey Kiselev
Posted on 2019-12-13, 11:06
Have the Floppy/Serial controller built. No need for the ROM at the moment. I have MS-DOS 6.22 booting from some brand new disks and created a startup disk with some good ole Dysan media. If anyone looks closely they'll see a mistake. Easily fixed with some tender care.
Re: Xi 8088 by Segey Kiselev
Posted on 2019-12-13, 03:19
Wahooo! Received a different VGA card. This one is an XP6676P with a WD90C11A-LR. I've ordered some 256KBx4 70ns DRAM for upgrading to 512KB. The TVGA8900D VGA output was dead. I may troubleshoot that later and have a few different VGA cards on the way to test with this unit. I don't have precision …
Re: Xi 8088 by Segey Kiselev
Posted on 2019-11-30, 20:32
Any of you use an SST39SF010A and always get a 76 code when programming with a TL866II plus and the bios128k-2.0 binary? Installed the variable picofarad capacitor and now I get a bit more info. 00 is displayed while the decimal dots are fluctuating. Continuing the debugging. I get a code 30 for a …
Re: Xi 8088 by Segey Kiselev
Posted on 2019-11-30, 19:16
Any of you use an SST39SF010A and always get a 76 code when programming with a TL866II plus and the bios128k-2.0 binary?
Re: Xi 8088 by Segey Kiselev
Posted on 2019-11-27, 06:19
My parts, I mostly got from Mouser. I will start assembly of the Micro ATX backplane soon. I have my parts placed on the board and ready to solder. Let the bees rip my flesh off.
Re: HardMPU, anyone?
Posted on 2019-10-29, 17:04
Thanks for sending me the boards. I hope to follow up with my build in a couple weeks.
Re: Xi 8088 by Segey Kiselev
Posted on 2019-10-25, 21:27
Greetings, I registered so I could join in on this topic since I am about to dive into the Xi 8088 build with Micro-ATX Backplane . PCB's included: Xi 8088 PCB Micro ATX backplane ISA SVGA v1.1 XT-CF-Lite ISA OPL2 ISA Floppy Disk and Serial Controller Micro 8088 PCB Most of my inventory has arrived …
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