I am going to make a computer or at least attempt to using some CPU chips and breadboards. The initial idea is to link each output pin such as halt to a led light.And the address buses too and link the inputs to switches.It will be a very basic CPU unit. What are your thoughts on this? -- ----Android NewsGroup Reader---- http://usenet.sinaapp.com/
Computer made with a zilog chip
Started by ●July 30, 2016
Reply by ●July 30, 20162016-07-30
Am 30.07.16 um 11:54 schrieb Vassilis Spiliopoulos:> I am going to make a computer or at least attempt to using some > CPU chips and breadboards. The initial idea is to link each > output pin such as halt to a led light.And the address buses too > and link the inputs to switches.It will be a very basic CPU unit. > What are your thoughts on this?My very first (actually my father's) computer was one of those: https://en.wikipedia.org/wiki/NDR-Klein-Computer A single board computer comprising a Z80 processor, an EPROM, a RAM chip and a few LEDs, keys and seven segment displays. If you can hunt down the circuit diagram and possibly a copy of the operating system, it would be relatively easy and cheap to build. Christian
Reply by ●July 30, 20162016-07-30
Christian Gollwitzer <auriocus@gmx.de> wrote:>A single board computer comprising a Z80 processor, an EPROM, a RAM chip >and a few LEDs, keys and seven segment displays. If you can hunt down >the circuit diagram and possibly a copy of the operating system, it >would be relatively easy and cheap to build.Can you still get "Vectorboard", and sockets for DIP chips? (I think you can still get the DIP chips themselves, mostly, as well as a wirewrap gun and wire.) Steve
Reply by ●July 30, 20162016-07-30
On 7/30/2016 4:54 AM, Vassilis Spiliopoulos wrote:> > I am going to make a computer or at least attempt to using some > CPU chips and breadboards. The initial idea is to link each > output pin such as halt to a led light.And the address buses too > and link the inputs to switches.It will be a very basic CPU unit. > What are your thoughts on this? >You might get more focused replies by describing your motivation(s). Was there a particular Zilog of interest? If so, why? etc. HTH
Reply by ●July 30, 20162016-07-30
On 30.07.2016 12:54, Vassilis Spiliopoulos wrote:> > I am going to make a computer or at least attempt to using some > CPU chips and breadboards. The initial idea is to link each > output pin such as halt to a led light.And the address buses too > and link the inputs to switches.It will be a very basic CPU unit. > What are your thoughts on this? >Sounds cool! I still remember a bit of z80 assembly from my childhood. Like, you can move a block of memory with a single instruction: http://www.z80.info/z80syntx.htm#LDDR Gene
Reply by ●July 30, 20162016-07-30
Christian Gollwitzer <auriocus@gmx.de> Wrote in message:> Am 30.07.16 um 11:54 schrieb Vassilis Spiliopoulos: >> I am going to make a computer or at least attempt to using some >> CPU chips and breadboards. The initial idea is to link each >> output pin such as halt to a led light.And the address buses too >> and link the inputs to switches.It will be a very basic CPU unit. >> What are your thoughts on this? > > My very first (actually my father's) computer was one of those: > > https://en.wikipedia.org/wiki/NDR-Klein-Computer > > A single board computer comprising a Z80 processor, an EPROM, a RAM chip > and a few LEDs, keys and seven segment displays. If you can hunt down > the circuit diagram and possibly a copy of the operating system, it > would be relatively easy and cheap to build. > > Christian > >Do you have any information about the schematics? Since your father designed it. -- ----Android NewsGroup Reader---- http://usenet.sinaapp.com/
Reply by ●July 30, 20162016-07-30
Am 30.07.16 um 16:16 schrieb Vassilis Spiliopoulos:> Christian Gollwitzer <auriocus@gmx.de> Wrote in message: >> My very first (actually my father's) computer was one of those: >> >> https://en.wikipedia.org/wiki/NDR-Klein-Computer >> > Do you have any information about the schematics? Since your > father designed it.Sorry, that came across in a wrong way. My father did not design that computer. It was the first he owned for himself and was accessible to me. He bought it as a kit, comprising board, small parts, ICs, instruction manual... and then within a few days we soldered it together. I learnt to code on that machine, you had to key in Z80 machine language in hexcode. So I still remember a few opcodes :) Maybe you can still find the manuals somewhere online. Unfortunately, since this was a German TV channel, I suspect that everything is in German, unfrotunately. In particular, there is this book: https://www.amazon.de/Mikrocomputer-selbstgebaut-programmiert-Bauelement-fertigen/dp/3772371620 which decribes very similar computers. Best regards, Christian
Reply by ●July 30, 20162016-07-30
On 30.07.2016 17:58, Christian Gollwitzer wrote:> Am 30.07.16 um 16:16 schrieb Vassilis Spiliopoulos: >> Christian Gollwitzer <auriocus@gmx.de> Wrote in message: >>> My very first (actually my father's) computer was one of those: >>> >>> https://en.wikipedia.org/wiki/NDR-Klein-Computer >>> >> Do you have any information about the schematics? Since your >> father designed it. > > Sorry, that came across in a wrong way. My father did not design that > computer. It was the first he owned for himself and was accessible to > me. He bought it as a kit, comprising board, small parts, ICs, > instruction manual... and then within a few days we soldered it > together. I learnt to code on that machine, you had to key in Z80 > machine language in hexcode. So I still remember a few opcodes :) > > Maybe you can still find the manuals somewhere online. Unfortunately, > since this was a German TV channel, I suspect that everything is in > German, unfrotunately. In particular, there is this book: > > https://www.amazon.de/Mikrocomputer-selbstgebaut-programmiert-Bauelement-fertigen/dp/3772371620 > > > which decribes very similar computers. > > Best regards, > > Christian >Haha. A similar story happened to me when my father assembled a floppy drive for a zx spectrum. Just it didn't end up equally well, because I accidentally stepped on a hot soldering iron with a bare foot. That was my first ever experience with soldering. ;-) Gene
Reply by ●July 30, 20162016-07-30
Evgeny Filatov <filatov.ev@mipt.ru> writes:> [...] > Haha. A similar story happened to me when my father assembled a floppy > drive for a zx spectrum. Just it didn't end up equally well, because I > accidentally stepped on a hot soldering iron with a bare foot. That > was my first ever experience with soldering. ;-) > > GeneHa! That reminds me of my first experience. I was not more than 7 years old when my younger brother and I got curious about the items on my dad's workbench in the garage one day while he was at work. We saw this thing that obviously plugged into the wall but didn't have any apparent function, so we plugged it into the wall. Nothing happened at first, but in about 60 seconds we figured out you don't handle it with your hands... -- Randy Yates, DSP/Embedded Firmware Developer Digital Signal Labs http://www.digitalsignallabs.com
Reply by ●August 1, 20162016-08-01
On 07/30/2016 05:54 AM, Vassilis Spiliopoulos wrote:> > I am going to make a computer or at least attempt to using some > CPU chips and breadboards. The initial idea is to link each > output pin such as halt to a led light.And the address buses too > and link the inputs to switches.It will be a very basic CPU unit. > What are your thoughts on this? >For a one-off, use wire-wrap sockets for the ICs and wire up the connections point-to-point under the perfboard. Those plastic "Radio Shack" plug-in breadboards will give you nothing but trouble.
