On Fri, 2004-01-16 at 02:40, David V. Corbin wrote:
( regarding
http://www.ljw.me.uk/educ8 )
> Cute little emulator... Two questions.
>
> 1) Can you release the source?
Yes, I'll do a GPL version of it real soon now. Maybe the LEDs and
Switches can be used by others :-)
> 2) Are schematics for the original TTL implementation available?
To get the original articles you would either have to buy reprints from
Silicon Chip magazine, or look for a copy of the reprint book (probably
very rare, I have one somewhere but I can't find it!)
Internally, data flow is bit-serial (PDP-8/S style) which keeps the chip
count down. This would certainly fit the bill for those wanting a
7400-based computer. Adding an RS-232 link wouldn't be difficult (a
UART interface was one of the published peripherals) and it can be made
to 'boot' from this, so saving a lot of switch twiddling.
I am thinking of doing a VHDL description of the Educ-8, and that could
lead on to making a CPLD/FPGA single-chip version.
> Thanks.
You're welcome, I hope it provides a bit of amusement.
Received on Sat Jan 17 2004 - 17:27:55 GMT