A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)

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zmemw16
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Re: A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)

Post by zmemw16 » Wed Dec 21, 2016 11:39 am

z80 NASCOM as in NAScom ASM mebler - yep - cpm on 5.25" £800 ukp then i modded the fdc circuit to switch clock speed
to the fdc - 8" was the standard distribution media from CPMUK library group. wrote a program to translate the media as well.
anyone remember skew tables 1,7,13,19 or 1,3,5,8 etc

6502
LDA #55 A9 #immediate value
LDA mem A5 mem addr
LDA ?? A3??? something??
LDA (indirect zeropage), offset y - my all time favourite

stephen
(edit1 minor)
Last edited by zmemw16 on Wed Dec 21, 2016 6:43 pm, edited 1 time in total.

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ahull
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Re: A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)

Post by ahull » Wed Dec 21, 2016 12:00 pm

MFM Hard disk G=C800:5 - more of my precious brain cells permanently dedicated to useless facts :D
- Andy Hull -

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martinayotte
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Re: A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)

Post by martinayotte » Wed Dec 21, 2016 12:09 pm

Apple ][ : call -151

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Just4Fun
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Re: A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)

Post by Just4Fun » Tue May 23, 2017 2:41 pm

Hi all,
as "promised" CP/M 2.2 up and running on two "floppy" emulated with two 24LC1025... :D



Here more info.

Cheers.

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ahull
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Re: A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)

Post by ahull » Tue May 23, 2017 10:07 pm

:D Are you planning on selling those as a kit? It takes me back to my green CRT days, writing stuff in complied Microsoft basic.. not 'cos it was any good, just 'cos it was all that came with the machine. You could do a lot on a CP/M machine... then I move on to Unix/Xenix and a whole new world opened up.
- Andy Hull -

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Just4Fun
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Re: A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)

Post by Just4Fun » Wed May 24, 2017 6:48 am

ahull wrote:Are you planning on selling those as a kit?
Hmmm... I don't think to have the time to set up a "business" on this thing. I know that it probably has some "potential market", but I prefer spend my limited spare time to "play" with other things... :lol:

I want continue a "paused" project of a "Low cost CPLD fun board" based on a Altera Max II and a STM32 used as "stimulus generator"...

After all my nickname says... Just4Fun... :mrgreen:

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