Jonas Edin's Page

ProjectsCurrent StatusComments
Processor boards
SBC V2RunningRunning with no problems at 20Mhz with Prop I/O or PPISD. Built with ALS and F-logic. Up to (at least) 12MHz with DiskIO v3, Dual IDE and Dual SD.
Z180 Mark IVRunningBuilt with LS-logic only. Z8S180-33 with 18.432MHz oscillator (x2), RomWBW 2.7.1 and UNA.
6x0x-ATX-6U Assembled68B09, Flex9
6x0x-ATX-6U Assembled6502, DOS/65
Mini-68k RunningRunning at 10 MHz with MC68008FN10. LS-logic only. Tested with MF-PIC, Disk I/O V3 and Dual IDE.
Kiss-68030 RunningRunning at 25MHz. CP/M-68k and Will's Linux distro.

I had problems programming the GALs (Lattice GAL22V10C and GAL22V10D). 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): http://www.edaboard.com/thread313237.html
Updated USB-drivers for Genius G540 can be found here: https://www.silabs.com/products/interface/Pages/direct-access-drivers.aspx
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 8MHz without any issues. Playing Adventure.
Reh CPU280 Running
Thank you Lamar for reviving Tilmann Reh's fascinating (although a bit frustrating) board. Tested with CPM Plus maintained by Wayne Warthen. Excellent work! https://github.com/wwarthen/CPU280
With a simple adapter I can use up to four 3.5“ and/or 5.25” FDs.
SBC-188 RunningTested with Dual IDE at 16 MHz. MS-DOS 6.22. Why not CPM-86?
MiniMax 8085 RunningI built a few…
Zeta 2 Running
I/O Boards
4UART-USB 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.
Disk I/O V3RunningBuilt with LS logic only. Tested with Mini-68k at 10 MHz and SBC V2 at 8, 10 and 12MHz.
Prop I/O V2RunningRunning with SBC V2 at 20 Mhz. Built with ALS logic except U3 (74LS682) and U7 (74F06).
Color VDU V2AssembledAlive. No thorough testing yet. Too many toys to play with!
Multifunction-PIC RunningBuilt two with LS-logic. One for Mini-68k and one for Kiss-68030.
Dual IDE with FDCRunningBuilt two with LS-logic. Tested with Mini-68k at 10 MHz, SBC V2 at 8, 10 and 12MHz and SBC-188 at 16 MHz.
Dual SDRunningBuilt with LS-logic. Tested with SBC V2 at 8, 10,12, 16 and 20MHz. Intermittent errors with old/slow SD-cards. Less problems with RomWBW 2.5.5 compared to 2.7.1
VGA3AssembledNot tested yet
ParPortPropRunningWith Zeta 2 at 20MHz
Mini boards
PPISDRunningTested with SBC V2 at 20 MHz and PPI CP82C55A or TMP82C55AP-10. Problems with old Lexar SD-cards but no problems at all with new 8 GB SDHC SanDisk cards.
PPIDEOrdered
Planned
ECB Am9511Not yetMath Coprocessor board with Am9511 at 3 or 4 MHz. Interfacing can be accomplished in several ways: memory mapped or as an IO-device - demand/wait, poll status, interrupt driven or DMA transfer. I'll go for simplicity rather than maximum performance. I suppose the Am9511 is quite useless for the Z8S18033 or MC68030 boards, but it could add some floating-point performance to a slow Z80 or a 68B09/6502.
Math look-up table Not yet 16-bit math look-up table. Maybe something like this: http://wilsonminesco.com/16bitMathTables/
ISA boards
Sergey's 8088
Xi 8088AssembledMy digital oscilloscope shows signs of activity
Micro 8088Ordered
ISA BackplaneAssembledAlive
ISA SVGA PCBRunningTested in my 286. I have built two of them. Surface mount is easy. Just solder it!
ISA OPL2RunningTested with Castle Wolfenstein (286+). I hear music!
ISA Floppy Disk and Serial Controller PCBAssembledAlive
ISA XT-CF-LiteAssembledAlive
ISA XT-IDE V2, x2AssembledAlive
VT100
Geoff Graham's ASCII VT100 Video Terminal modified Running I modified Geoff's excellent construction in some small details. I added yet another LED (+5V), a DC power 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! http://geoffg.net/terminal.html
Sharp MZ-series MZ-80B, MZ-700, MZ-800 www.sharpmz.org
http://www.old-computers.com/museum/default.asp
FDC boardSome progressFDC board based on WD1773, for Sharp MZ-80B, MZ-700 and MZ-800
RS232 boardRunningFor Sharp MZ-800 and MZ-80B.
QuickDisk IFRunningQuickDisk interface for Sharp MZ-800. An easy biuild, only three ICs. QuickDisks store and access data in sequence, not random access, but they are quite fast and give the user the illusion of random access.