Build your own Z80 CP/M homebrew computer
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From: lynchaj on 15 Jan 2010 22:58 On Jan 15, 8:12 am, Mycelium <mycel...(a)thematrixattheendofthemushroomstem.org> wrote: > On Thu, 14 Jan 2010 21:53:45 -0800 (PST), Richard Henry > > > > <pomer...(a)hotmail.com> wrote: > >On Jan 14, 2:38 pm, lynchaj <lync...(a)yahoo.com> wrote: > >> 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 low cost ECB Eurocard PCBs from me. > > >> 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) > > >> There are a number of S-100 boards available also with more on the > >> way. > > >> S-100 backplane (6 slot with active termination) > > >> S-100 prototyping board > > >> S-100 buffered prototyping board > > >> S-100 IDE board > > >> 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 > > >Did this message get stuck in the pipes for about 20 years? > > Much more fun to emulate every processor that has been in major use > since the beginning (practically) using the MAME emulator. > > And it plays games too. All of them, in fact. Hi! Yes, but MAME is just an emulator that runs on a PC. There is no building involved, no design, no creation, no joy of watching it work for the first time. Just another boring program running on commodity PCs. MAME is a fine program but is no substitute for building your own computer from scratch. If you do not understand what I mean then you should try it some time. Electronics is a fun hobby. Thanks and have a nice day! Andrew Lynch
From: Mycelium on 15 Jan 2010 23:57 On Fri, 15 Jan 2010 19:58:59 -0800 (PST), lynchaj <lynchaj(a)yahoo.com> wrote: >On Jan 15, 8:12�am, Mycelium ><mycel...(a)thematrixattheendofthemushroomstem.org> wrote: >> On Thu, 14 Jan 2010 21:53:45 -0800 (PST), Richard Henry >> >> >> >> <pomer...(a)hotmail.com> wrote: >> >On Jan 14, 2:38�pm, lynchaj <lync...(a)yahoo.com> wrote: >> >> 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 low cost ECB Eurocard PCBs from me. >> >> >> 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) >> >> >> There are a number of S-100 boards available also with more on the >> >> way. >> >> >> S-100 backplane (6 slot with active termination) >> >> >> S-100 prototyping board >> >> >> S-100 buffered prototyping board >> >> >> S-100 IDE board >> >> >> 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 >> >> >Did this message get stuck in the pipes for about 20 years? >> >> �Much more fun to emulate every processor that has been in major use >> since the beginning (practically) using the MAME emulator. >> >> � And it plays games too. �All of them, in fact. > >Hi! Yes, but MAME is just an emulator that runs on a PC. There is no >building involved, no design, no creation, no joy of watching it work >for the first time. Just another boring program running on commodity >PCs. > >MAME is a fine program but is no substitute for building your own >computer from scratch. If you do not understand what I mean then you >should try it some time. Electronics is a fun hobby. > >Thanks and have a nice day! > >Andrew Lynch Today, I made (integrated) a satellite modem, an 8 port router, a mobile antenna controller chassis, and a GPS synchronized gyroscopic inertial stabilizer.... from scratch. Electronics is a fun career.
From: Sylvia Else on 16 Jan 2010 01:47 lynchaj wrote: > MAME is a fine program but is no substitute for building your own > computer from scratch. Execpt that what is proposed would not be building it from scratch. The major parts of the computer are the processor and the memory, neither of which are going to be built by all but the most dedicated DIYer. Even then it would only be "from scratch" if we allow that to involve the use of ready made discrete components. Unless you're going to purify your own silicon, etc. Sylvia.
From: lynchaj on 16 Jan 2010 08:27 On Jan 16, 1:47 am, Sylvia Else <syl...(a)not.at.this.address> wrote: > lynchaj wrote: > > MAME is a fine program but is no substitute for building your own > > computer from scratch. > > Execpt that what is proposed would not be building it from scratch. The > major parts of the computer are the processor and the memory, neither of > which are going to be built by all but the most dedicated DIYer. > > Even then it would only be "from scratch" if we allow that to involve > the use of ready made discrete components. Unless you're going to purify > your own silicon, etc. > > Sylvia. True enough. Please let me clarify. In this context "from scratch" means from the SSI, MSI, LSI component level. The builders supply their own passive components, connectors, transistors, and 74xx family logic. There are some LSI chips but those typically available in the late 1970's/early 1980's era with a few exceptions (4Mb SRAM, Propeller, etc). They can either make their own PCBs or use those I had made. Typically "homebrew" implies the use of prototyping boards and/or home etched PCBs but in this case I designed the PCBs based on my own prototyping so it is a bit of a jump start for new builders. The intent of the N8VEM homebrew computing project is make the hobby accessible to new hobbyists and those who would rather build using DIP 0.1" PTH construction instead of SMT etc. Thanks and have a nice day! Andrew Lynch
From: Mycelium on 16 Jan 2010 12:37
On Sat, 16 Jan 2010 17:47:26 +1100, Sylvia Else <sylvia(a)not.at.this.address> wrote: >lynchaj wrote: > >> MAME is a fine program but is no substitute for building your own >> computer from scratch. > >Execpt that what is proposed would not be building it from scratch. The >major parts of the computer are the processor and the memory, neither of >which are going to be built by all but the most dedicated DIYer. > >Even then it would only be "from scratch" if we allow that to involve >the use of ready made discrete components. Unless you're going to purify >your own silicon, etc. > >Sylvia. Point-to-point wiring... better keep it pretty slow too. :-) |