MaxIO project.(OUTPUT) [KICAD; ZX81/SPECTRUM]

[XavSnap]

HI,

After the MaxIO INPUT project.

Let's go to the second driver card ...

Drive by the OUT $2F(card selector) and OUT $3F (data feed on selected card) IORQ port.
5v external supply for the slave cards (5v from the ZX not used).

ZX81-Ts100-TS1500-ZX SPECTRUM user friendly.

MaxIO_OUTPUT.pdf

(194.74 KiB) Downloaded 105 times

Kicad & Gerber:

MaxIO_MotherCard _OUTPUT.zip

(567.51 KiB) Downloaded 97 times

Have fun.

[XavSnap]

14 Output on a single card = 112 Outputs !

2 dual output (out #1 & out #8)
Common or dual power supply.
DC 5v or 12v external power supply (LED resistors had to be changed 470>5v 1k>12v).
You had to set the jumper set to link the power supply input.
Barrel jack to supply both output rack.
2 Buffered 7bits data, the bit#7 seclect the bloc 1-7 or 8-14.

MaxIO_14OUTPUT.pdf

(306.5 KiB) Downloaded 102 times

Kicad & Gerber:

MaxIO_14OUTPUT.zip

(740.9 KiB) Downloaded 111 times

[XavSnap]

Hi,
The link PCB released 1.1:

Only the pin 20 link was added.

This one works on both projects INPUT & OUTPUT.

On the last release from the input project, you had to short-cut this pin 20 to make it work.

Kicad & Gerber files:

MaxIO_Link2.zip

(95.44 KiB) Downloaded 136 times

[XavSnap]

Hi,

If you are interested in PC Centronics or RS232C interfaces, have a look to this link:

http://abandon.pcbs.free.fr/interfacespc.htm

from
https://www.abandonware-magazines.org/a ... 403&page=1

I'am working on the issue 1 (RS232 and Centronics IO port)
(French magazines)

Have fun....
Xavier.