sergey
Veteran Member
Hi,
As some of you know I am working on "build your own PC from the scratch" kind of project.
There were many advancements this fall:
- I updated and re-ordered the processor board - Xi 8088 (The previous version was named Sergey's XT... but since it not exactly an XT and I didn't want the name to be personal, I renamed it... Other than being a random Greek letter, Xi can stand for "XT Improved"). Here is the Wiki page for this board: http://n8vem-sbc.pbworks.com/w/page/59325872/Xi 8088
- I designed a MiniATX ISA backplane, that also includes a POST display and an ATX power on circuit. Wiki page: http://n8vem-sbc.pbworks.com/w/page/60306006/ISA Backplane
- I built an Adlib-compatible OPL2 sound card: http://www.malinov.com/Home/sergeys-projects/isa-opl2-card
- I updated my BIOS with serial port support and now working on the parallel port support.
The latest (finished today) addition is the ISA Floppy Disk and Serial Controller: http://www.malinov.com/Home/sergeys-projects/isa-fdc-and-uart
I was working on this project for quite some time (without any relation to Andrew's XT FDC project). Initially I wanted to include FDC and UART on my 8088 motherboard (the plans were to design a MiniATX motherboard instead of an 8088 processor card). And since I decided to build yet another ISA card form factor CPU board, the FDC and UART parts became a separate board.
As with my some other projects (e.g. Zeta SBC), I wanted this board to be minimalistic and beginners friendly as possible. Hence relatively small size, no jumpers - DIP switches are used instead (they are also more reliable), no exotic functions (such as secondary FDC address, selectable FDC IRQ/DRQ, etc). But there is a nice silk screen with all component values and switch settings.
For now I only ordered 3 prototype PCBs, and assembled and tested one of them. I found a couple of very minor issues (one pin uses a wrong drill diameter, and incorrect SW1 description on the silk screen), and otherwise the board is fully functional. If there is a demand I can put a bigger PCB order (20 or so). In this case the price per PCB will be about $10.
Thanks,
Sergey
My Current Xi 8088 System, Front View:
Rear View:
ISA Floppy Disk and Serial Controller:
As some of you know I am working on "build your own PC from the scratch" kind of project.
There were many advancements this fall:
- I updated and re-ordered the processor board - Xi 8088 (The previous version was named Sergey's XT... but since it not exactly an XT and I didn't want the name to be personal, I renamed it... Other than being a random Greek letter, Xi can stand for "XT Improved"). Here is the Wiki page for this board: http://n8vem-sbc.pbworks.com/w/page/59325872/Xi 8088
- I designed a MiniATX ISA backplane, that also includes a POST display and an ATX power on circuit. Wiki page: http://n8vem-sbc.pbworks.com/w/page/60306006/ISA Backplane
- I built an Adlib-compatible OPL2 sound card: http://www.malinov.com/Home/sergeys-projects/isa-opl2-card
- I updated my BIOS with serial port support and now working on the parallel port support.
The latest (finished today) addition is the ISA Floppy Disk and Serial Controller: http://www.malinov.com/Home/sergeys-projects/isa-fdc-and-uart
I was working on this project for quite some time (without any relation to Andrew's XT FDC project). Initially I wanted to include FDC and UART on my 8088 motherboard (the plans were to design a MiniATX motherboard instead of an 8088 processor card). And since I decided to build yet another ISA card form factor CPU board, the FDC and UART parts became a separate board.
As with my some other projects (e.g. Zeta SBC), I wanted this board to be minimalistic and beginners friendly as possible. Hence relatively small size, no jumpers - DIP switches are used instead (they are also more reliable), no exotic functions (such as secondary FDC address, selectable FDC IRQ/DRQ, etc). But there is a nice silk screen with all component values and switch settings.
For now I only ordered 3 prototype PCBs, and assembled and tested one of them. I found a couple of very minor issues (one pin uses a wrong drill diameter, and incorrect SW1 description on the silk screen), and otherwise the board is fully functional. If there is a demand I can put a bigger PCB order (20 or so). In this case the price per PCB will be about $10.
Thanks,
Sergey
My Current Xi 8088 System, Front View:
Rear View:
ISA Floppy Disk and Serial Controller:
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