Hi! If you are interested in building your own homebrew Z80 CP/M single board computer please contact me. I have many PCBs available for the N8VEM SBC and all the peripherals. You build the computer yourself using the PCBs you either make them yourself or you can buy the ECB Eurocard PCBs for $20 each plus shipping. There are several PCBs available: SBC (Z80 CPU, 512K SRAM, 1MB ROM, serial port, parallel port, RTC, and ECB bus interface) ECB backplane (6 slots) ECB bus monitor (with bus status, address trapping, and single step modes) ECB prototyping board (with IO decoding circuitry) DiskIO (floppy and IDE interfaces) Zilog Peripherals (CTC timer, DART dual serial, dual PIO with 4 eight bit parallel ports) VDU (video interface with PS/2 keyboard, PS/2 mouse, and parallel printer port) 6809 host processor (128K SRAM, 2K ROM, expansion bus) I just received the PCB for the 6809 IO mezzanine board (ACIA serial, PTM timer, dual VIA parallel ports and timers, and expansion bus). An N8VEM builder has ported CUBIX to the 6809 host processor and we are working to get the 6809 IO mezzanine supported. Builders can boot from floppy disks, IDE, ATAPI, and/or ROM images. Some use CF adapters. The system can use the serial IO terminal or the VDU for self contained booting. Interfaces with the DSKY board (available from a different builder other than me) for "front panel" like interface to the monitor. There are more PCBs in work including a PropIO (VGA, PS/2 keyboard, microSD, and prototyping area with 14 spare IO pins) that should be available soon. I estimate the PCBs will be available in early Feb 2010. All the design information for the N8VEM hardware and software is freely and publicly posted. Please feel free to join us if you would like to participate. http://n8vem-sbc.pbworks.com/ http://groups.google.com/group/n8vem Thanks and have a nice day! Andrew Lynch
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On Jan 13, 7:21=A0pm, lynchaj <lync...@yahoo.com> wrote: > Hi! =A0If you are interested in building your own homebrew Z80 CP/M > single board computer please contact me. =A0I have many PCBs available > for the N8VEM SBC and all the peripherals. =A0You build the computer > yourself using the PCBs you either make them yourself or you can buy > the ECB Eurocard PCBs for $20 each plus shipping. > Hi! One of the N8VEM builders just posted this photo of a completed system. http://n8vem-sbc.pbworks.com/f/n8vem_case_nb.JPG The homebrew computer is functionally complete with all the components you would expect of a system of the late 1970's early 1980's era. Andrew Lynch
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lynchaj ha scritto: > http://n8vem-sbc.pbworks.com/f/n8vem_case_nb.JPG > > The homebrew computer is functionally complete with all the components > you would expect of a system of the late 1970's early 1980's era. Sadly the 3.5" drive ruins this retro-homebrew look... But, side note, what function(s) have the two leftmost LED in every led row ? Best regards from Italy, Dott. Piergiorgio.
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On Jan 16, 4:03=A0am, "dott.Piergiorgio" <dott.PiergiorgioNI...@KAIGUN.fastwebnet.it> wrote: > lynchaj ha scritto: > > >http://n8vem-sbc.pbworks.com/f/n8vem_case_nb.JPG > > > The homebrew computer is functionally complete with all the components > > you would expect of a system of the late 1970's early 1980's era. > > Sadly the 3.5" drive ruins this retro-homebrew look... > But, side note, what function(s) have the two leftmost LED in every led > row ? > > Best regards from Italy, > Dott. Piergiorgio. Hi, Here are the functions of the LED's; - - A15 A14 A13 A12 A11 A10 A09 A08 RES - A07 A06 A05 A04 A03 A02 A01 A00 IEO IEI D7 D6 D5 D4 D3 D2 D1 D0 HLT NMI WAIT INT WR MREQ RD RFSH IORQ M1 BUSRQ BUSAK H4 H3 H2 H1 IN=3D WAITA FF DATA_O Kind Regards, Nik
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On Jan 15, 6:50=A0pm, Nik Brisevac <nbrise...@optusnet.com.au> wrote: > On Jan 16, 4:03=A0am, "dott.Piergiorgio"<dott.PiergiorgioNI...@KAIGUN.fas= twebnet.it> wrote: > > lynchaj ha scritto: > > > >http://n8vem-sbc.pbworks.com/f/n8vem_case_nb.JPG > > > > The homebrew computer is functionally complete with all the component= s > > > you would expect of a system of the late 1970's early 1980's era. > > > Sadly the 3.5" drive ruins this retro-homebrew look... > > But, side note, what function(s) have the two leftmost LED in every led > > row ? > > > Best regards from Italy, > > Dott. Piergiorgio. > > Hi, > Here are the functions of the LED's; > - =A0 =A0 =A0 - =A0 =A0 =A0 A15 =A0 =A0 A14 =A0 =A0 A13 =A0 =A0 A12 =A0 = =A0 A11 =A0 =A0 A10 =A0 =A0 A09 =A0 =A0 A08 > RES =A0 =A0 - =A0 =A0 =A0 A07 =A0 =A0 A06 =A0 =A0 A05 =A0 =A0 A04 =A0 =A0= A03 =A0 =A0 A02 =A0 =A0 A01 =A0 =A0 A00 > IEO =A0 =A0 IEI =A0 =A0 D7 =A0 =A0 =A0D6 =A0 =A0 =A0D5 =A0 =A0 =A0D4 =A0 = =A0 =A0D3 =A0 =A0 =A0D2 =A0 =A0 =A0D1 =A0 =A0 =A0D0 > HLT =A0 =A0 NMI =A0 =A0 WAIT =A0 =A0INT =A0 =A0 WR =A0 =A0 =A0MREQ =A0 = =A0RD =A0 =A0 =A0RFSH =A0 =A0IORQ =A0 =A0M1 > BUSRQ =A0 BUSAK =A0 H4 =A0 =A0 =A0H3 =A0 =A0 =A0H2 =A0 =A0 =A0H1 =A0 =A0 = =A0IN=3D =A0 =A0 WAITA =A0 FF =A0 =A0 =A0DATA_O > > Kind Regards, > Nik Hi Nik! Thanks! There is also the DSKY panel on the top of the computer that allows many "front panel" like functions and direct interface to the monitor. DSKY is very nice indeed and I use mine all the time. It is especially powerful when used with the ECB bus to monitor and trap addresses for single stepping. Thanks and have a nice day! Andrew Lynch
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