Jonas Edin's Page

ProjectsCurrent StatusComments
Processor boards
SBC V2RunningRunning with no problems at 20 Mhz with Prop I/O, PPIDE or PPISD. Built with ALS and F-logic. Up to (at least) 12 MHz with DiskIO v3, Dual IDE and Dual SD. My first build at N8VEM.
Z180 Mark IVRunningBuilt with LS-logic only. Z8S180-33 with 18.432 MHz oscillator (x2), RomWBW and UNA. I love this board. Thank you John!
6x0x-ATX-6U Assembled68B09, Flex9, not tested
6x0x-ATX-6U Assembled6502, DOS/65, not tested
Mini-68k RunningRunning at 10 MHz with MC68008FN10. LS-logic only. Tested with MF-PIC, Disk I/O V3 and Dual IDE. Excellent board!
Kiss-68030 Running
Running at 25 MHz. CP/M-68k and Will's Linux distro. Excellent board! A piece of magic.

I had problems programming the GALs (Lattice GAL22V10C or GAL22V10D) with my MiniPro TL866. Solved with yet another programmer - a Genius G540. I quote: The Genius G540 programmer is a case of good hardware let down by its software. An effort to improve the English can be found here (not tested yet):
Updated USB-drivers for Genius G540 can be found here:
SBC6120-RBC Edition RunningThank you Andrew for all the hard work preparing boards and kits! Assembled and ready one day after arrival. Beautiful. Running at 8 MHz without any issues. Playing Adventure.
Reh CPU280 RunningThank you Lamar for reviving Tilmann Reh's fascinating (although a bit frustrating) board. Tested with CPM Plus maintained by Wayne Warthen. Excellent work Wayne!
With a simple adapter I can use up to four 3.5“ and/or 5.25” FDs.
SBC-188 RunningRunning at 25 MHz as a SBC with PPIDE. Tested with Dual IDE at 16 MHz. MS-DOS 6.22. Why not CPM-86? Yet another gem from John.
MiniMax 8085 RunningI have built quite a few… with 8 MHz Tundra 80C85. Simple, elegant, capable and possible to expand.
Zeta 2 RunningRunning at 20 MHz with ParPortProp. Excellent boards! A complete and very capable CP/M-system. Thank you Sergey!
I/O Boards
4UART-USB AssembledNot tested yet, too many toys…
4MEM AssembledNot tested yet
Backplane-8, x5! RunningSturdy, bullet-proof, reliable.
Bus MonitorAssembled and aliveBlinkenlights! Testing and learning. This is supposed to be a useful piece of equipment.
Color VDU V2AssembledAlive
Disk I/O V3RunningBuilt with LS logic only. Tested with Mini-68k at 10 MHz and SBC V2 at 8, 10 and 12 MHz.
Dual IDE with FDCRunningBuilt two with LS-logic. Tested with Mini-68k at 10 MHz, SBC V2 at 8, 10 and 12 MHz and SBC-188 at 16 MHz.
Dual SDRunningBuilt with LS-logic. Tested with SBC V2 at 8, 10,12, 16 and 20 MHz. Intermittent errors with old/slow SD-cards.
Multifunction-PICRunningBuilt two with LS-logic. One for Mini-68k and one for Kiss-68030.
Prop I/O V2RunningRunning with SBC V2 at 20 Mhz. Built with ALS logic except U3 (74LS682) and U7 (74F06).
Reh IDEAssembledBuilt two, not tested yet.
SCSI2IDERunning…The card is alive, but I have problems connecting to SCSI-adapter.
VDUAssembledNot tested yet
VGA3AssembledNot tested yet
ParPortPropRunningWith Zeta 2 at 20 MHz
Mini boards
PPISDRunningTested with SBC V2 at 20 MHz (using PPI CP82C55A or TMP82C55AP-10). Problems with old Lexar SD-cards but no problems at all with new 8 GB SDHC SanDisk cards.
PPIDERunningTested with SBC V2 at 20 MHz and SBC-188 at 25 MHz.
Am9511 for MiniMax8085 Not yetHW implementation seemingly easy but SW more of a challenge.
ECB Am9511Not yetMath Coprocessor board with Am9511 at 3 or 4 MHz. Memory mapped or as an IO-device.
ECB NS32081Not yetI have hoarded some NS32081 at 10 and 15 MHz. Maybe for use with a NS32CG160? It is possible to use the coprocessor as a peripheral device with other CPUs (68000, Z280 et c) as well.
Grant Searle's 6502 Soon
Grant Searle's 6809 Soon
Math look-up table Not yet 16-bit math look-up table. Maybe something like this:
ISA boards
Sergey's 8088
Xi 8088RunningRunning at last! I have experienced some stability problems. Active termination? Maybe something like this:
Micro 8088Running
A compact and stable system at 9.55 MHz with NEC V20, i8087, Sergey's SVGA, Floppy Disk and Serial Controller and XT-CF Lite. I have tested a lot of DOS and Windows software, including AutoCAD, Windows 3.0, Windows286/2.11, Word Perfect, Word, Works, Excel, Lotus 123, Quattro Pro, Paradox, FoxPro, Aldus Pagemaker, CorelDraw, et cetera, et cetera.

A lot of so called abandonware can be found here:

I am using USE!UMBS.SYS and DosMax. Only 10 kB below 640 kB after booting MS-DOS 6.22!
I must build an EMS-board or two.
ISA BackplaneRunningAlive
ISA SVGA PCBRunningTested in Xi 8088, Micro 8088 and my 286. I have built two of them. The TVGA9000i is a 160-pin millipede, but surface mount is easy with some practice, a good soldering iron, flux and reading glasses. Just solder it! Listening to (or reading) some good advice is recommended.
ISA OPL2RunningTested with Castle Wolfenstein (286+). I hear music!
ISA Floppy Disk and Serial Controller PCB RunningTested in Xi 8088 and Micro 8088
ISA XT-CF-LiteRunningWith Micro 8088
ISA XT-IDE V2, x2Assembled
ISA XT-IDE V4 Assembled
Geoff Graham's ASCII VT100 Video Terminal modified Running A single-chip VT100, based upon the PIC32MX256, a 28-pin DIP. Well, you also need a voltage regulator and some passive components. I modified Geoff's excellent construction in some small details. I added yet another LED (+5V), a DC power barrel jack, a different RCA socket, a different and less anemic 3.3V voltage regulator, jumper blocks for RGB color selection, a D-sub connector and a MAX233. I allowed the PCB to be larger (100×75 mm) and single-sided. I had to add a few wires on top. I used Geoff's software unmodified. I actually built two and bought a PICKit3 for $10, chinese copy for sure, but working!
PIC32 computer
Geoff Graham's Colour Maximite Running A very capable, single-chip BASIC computer, based upon the PIC32MX795 and with Graham's MMBasic. The PIC32 is a 100-pin 14×14 mm component. Quite easy to solder (or at least within reason for a beginner) if you listen to or read some good advise!

I have built four Colour Maximites. One with MMBasic, one with RetroBSD, one with something else(?) and one just for fun (or for give away). I got overconfident when I built the fourth computer. I dropped the PIC, picked it up and soldered it 90 degrees wrong. All one hundred pins were firmly soldered to the board. I de-soldered the chip using a glass ceramic hotplate at moderate heat. I could lift the chip from the board after a few seconds. Chip and board where not damaged.
Or why not try BSD UNIX (RetroBSD)?
Sharp MZ-series MZ-80B, MZ-700, MZ-800
To be continued…
FDC boardSome progress
RS232 boardRunningFor Sharp MZ-800 and MZ-80B.
QuickDisk IFRunningQuickDisk interface for Sharp MZ-800. An easy build, only three ICs. QuickDisks store and access data in sequence like tapes, not random access, but the disks are quite fast and give the user the illusion of random access.

builderpages/jonas_edin/start.txt · Last modified: 2020/03/31 08:03 by
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