Homebrew Microcputer design...getting ICs and stuff.

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lezanderson
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Homebrew Microcputer design...getting ICs and stuff.

Post by lezanderson » Tue May 21, 2013 3:19 pm

For anyone interest in homebrew microcomputer design or just making add-on and electronics gizmo's..this might be of interest.

Sourcing affordable ICs at reasonable prices can be quite tricky, as well as getting datasheets and schematics. I've listed some ICs below which are quite cheap and readily available. There's also plenty of schematics and datasheets for free!

Video ICs

V9958 (plus D41464 DRAMs 4pcs) enhanced TMS9918 good for homebrew video cards . Easy to interface lots of TEXT and Graphics modes, Sprites, Hardware accelerator functions too ! 256x192 (256 Colors), 512 x 192 (16 colors) 40x24 Text, 80 x 24 Text


V6366 (plus EEPROM+DRAMs D41464 2pcs) used in early IBM PC cards gives CGA/EGA type modes. 320 x200, 640 x 200 (16 colors) 640 x 350 + 80 x 25 text etc..

datasheets for these can be found at alldatasheets.com

Sound ICs..Obviously the AY-3-8910, plus things like SN76849 & SAA1099 can be easily sourced and cheap !

CPLDs such as the EPM7160SLC84 can be used to create a ULA and Glue logic. A ZX Spectrums ULA fits into 144 Macrocells or so. so you should be able to pop an ORICs ULA onto an EPM7160 !

i tend to source my stuff from G&C bypassing ebay and saving all the ebay fees !

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Dbug
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Re: Homebrew Microcputer design...getting ICs and stuff.

Post by Dbug » Sat Jun 08, 2013 8:17 am

Is there anything in there that could benefit the 'cumulus' project?

Godzil
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Re: Homebrew Microcputer design...getting ICs and stuff.

Post by Godzil » Sat Jun 08, 2013 5:28 pm

Dbug wrote:Is there anything in there that could benefit the 'cumulus' project?
Don't think so.

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Steve M
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Re: Homebrew Microcputer design...getting ICs and stuff.

Post by Steve M » Sat Jun 08, 2013 9:47 pm

It's building a computer from scratch but the schematics arent' there for the components provided.
Whilst there are documents there doesnt' seem to be enough to actually build anything.

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