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Messing around with Hardware !


Xenophon
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I've been pondering for some time about building my own Super Colecovision console/computer and now I feel iit's the time to strike ! So I've bought some breadboard, wire, already had tools soldering iron etc and am now doing a draft design and looking at what components ICs I'll need. OK my knowledge of microcomputers and electronics isn't great, but that's the whole point I'll be on a steep learning curve and even if I don't make a working Colecovision (which is most likely) at least I tried and learnt stuff on the way !

 

Is anyone else doing a similar sort of thing >?

 

 

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My draft design (to breadboard) would be :

 

Z80 CPU

(possibly Z84C0006PEC or Z84C0008PEC) as these are very cheap:

http://www.ebay.com/itm/10PCS-Z84C0006PEC-Z80-CPU-Encapsulation-DIP-/371218968377?pt=LH_DefaultDomain_0&hash=item566e5fef39

http://www.ebay.com/itm/10pcs-Z84C0008PEC-Z84C0008-DIP-40-/171399504172?hash=item27e834e12c

 

SRAM (static RAM) as opposed to the original DRAMs .. probably use 64K to allow CP/M option ??

 

EPROM 27C64 for O/S etc ?

 

V99x8 Video (seen several schematics of boards already done) making this somewhat easier

SN76489 Sound Chip

YMZ284 / AY-3-8910 Sound chip for MSX sound

 

Glue logic / could be TTL /PLD/GAL or a CPLD yet to decide

 

Shall start breadboarding as soon as stuff arrives, all going well !

Edited by Xenophon
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I've got

 

G540 Universal Programmer good for programming GALs/PLDs, EPROMs,EEPROMs etc

 

http://www.ebay.com/itm/G540-USB-Universal-EPROM-FLASH-GAL-AVR-PIC-Programmer-/121385641896?hash=item1c4325e7a8

 

USB Blaster .. a cheap programmer to program CPLDs like the Altera MAX EPM7128SLC84

 

http://www.ebay.com/itm/Altera-Mini-Usb-Blaster-Cable-For-CPLD-FPGA-NIOS-JTAG-Altera-Programmer-/371397950823?hash=item56790afd67

Edited by Megatron1999
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Spotted this on ebay.com

 

http://www.ebay.com/itm/Zilog-Z80-Colecovision-Kit-8MHz-Z80-MSX-Homebrew-/151686369904?pt=LH_DefaultDomain_0&hash=item2351365270

 

Bought stuff from them before and they are OK to deal with, though stuff from China takes forever to arrive !

I've bought stuff from funkward-tech , G&C Supermarket and a few other Chinese Suppliers, on the whole I had no problems, obviously with some of the ICs being pulls watch out for the odd DUFF IC, I got a few faulty ICs, they where replaced for free.. so check the ICs as soon as they arrive if possible.

 

The Cheap Z84C0020PECs on ebay.com are 'Remarked/labelled' old NMOS Z80s (Z80A,Z80B,Z80H) so be aware of that. I got some (10pcs) and found 80% worked fine at 4MHz+ some even worked at 16MHz but they where NOT 20MHz Z84C0020s !

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I've done costings for a similar type of thing you may find helpful (or not):

 

Rough guide to costing !

 

Z84C0008PEC Z80 CPU DIP40 $2.0 each

UM61512 64K SRAM narrow DIP32 $1.50 each or so

HM61256 32K SRAM DIP28 <$1.0 each

M27C64 8K EPROM <$1.0 each

W27C512 EEPROM (DIP/PLCC) <$1.0 each

EPM7128SLC CPLD 64 I/O lines $2.0 each

V9958 VDP $7.0 each

D41464x-10 DIP $0.75 each

CXA1645/1145 PAL/NTSC encoder $1.45 each

SN76489 PSG Sound Chip $0.50 each

AY-3-8910 PSG MSX $1.40 each

8255 PIO about $1.80 each

ATmega88 MCU $1.0 each

AT89C2051 MCU <$1.0 each

 

 

Optional :

 

RTC (DS12C887) $2.0 each

Z84C9008VSC Z80 CTC,PIO,SIO $2.0 each

AM9511 Maths Co processor $2.50 each

 

these prices where quoted by funkward-tech as I've got these ICs before from them.

 

 

Obviously you could by from mouser,Digikey etc, but you'd pay about five times as much, it all depends on how you feel about getting ICs from China.

----

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  • 2 weeks later...

I've been pondering for some time about building my own Super Colecovision console/computer and now I feel iit's the time to strike ! So I've bought some breadboard, wire, already had tools soldering iron etc and am now doing a draft design and looking at what components ICs I'll need. OK my knowledge of microcomputers and electronics isn't great, but that's the whole point I'll be on a steep learning curve and even if I don't make a working Colecovision (which is most likely) at least I tried and learnt stuff on the way !

 

Is anyone else doing a similar sort of thing >?

 

Hi.

 

Did you get any interest in a Z80 hardware group ??

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