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robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2442
Posted: 02:31pm 26 Dec 2018
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alas, i can't see myself having much chance to pick up a soldering iron for the next few months - am currently living through 'interesting times' - but i am following the thread (and the MBC2 project) with interest.
another idea did come to mind: using a 1284 (or similar) as an i/o expander for an MX170, communicating with mmbasic through a serial port. the 1284 could provide SD card support for ascii data files, RTC, an extra 16 I/O lines, etc. commands sent to the 1284 and replies sent back would be plain english ascii text. for example:
OPEN "COM1:230400" AS #6 PRINT #6, "files *.txt" do INPUT #6, NAME$ PRINT NAME$ loop until NAME$=""
a set of very simple library routines could be created in basic to implement commands like DIR, FREAD, FWRITE, GETRTC, SETRTC, IOREAD, IOWRITE, etc.
the advantage of not just going to an MX470 is in keeping everything through-hole.
cheers, rob :-)
Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 949
Posted: 07:34pm 26 Dec 2018
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Thanks Jman!
It is a good idea to do this with an I2C-bus UART! ...but how can this be implemented???
A good friend would also like to build himself a Z80-MBC2 - does anyone have any PCB's left?
Frank
jman Guru Joined: 12/06/2011 Location: New ZealandPosts: 711
Posted: 09:31pm 26 Dec 2018
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Hi Frank
PM sent
Regards Jman
f1fco Senior Member Joined: 18/03/2012 Location: FrancePosts: 155
Posted: 03:23pm 27 Dec 2018
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hi, a complete kit is available here : https://shop.mcjohn.it/en/diy-kit/22-32-kit-z80-mbc2.html price is correct with all the components, SD card, RTC...
Pierre, from Nimes, south of France73s de F1FCO
Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 949
Posted: 07:04pm 27 Dec 2018
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Hi F1FCO,
thank you for the hint! 72,48€ seems a little high to me - I have bought a few components "expensive" on Ebay and have come to a total of about 40€... (It would have been about 10€ cheaper if I had ordered the modules and the processor direct in China...) The worse thing is that you can only pay with credit card and not with PayPal - I have only PayPal!
Has anyone had any experience with the Turbo Pascal? It works with me only under "CP/M 3 * 64K" and there I have only 13.5 KB free memory - for my moon phase program I would need more!
Frank
Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 949
Posted: 10:37am 29 Dec 2018
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Hi Jman,
have you read my pm?
Frank
jman Guru Joined: 12/06/2011 Location: New ZealandPosts: 711
Posted: 07:04pm 29 Dec 2018
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Done and replied
Regards Jman
Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 949
Posted: 06:46pm 17 Jan 2019
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Hi Jman,
my friend received your pcb today! Thanks a lot!!!
Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.
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