ZX-MMC2 ("the ZXPand") Update log

[Moggy]

The thing about ROMs on the ZX80/1 is that unless it's physically located on the board the ULA can't access video pattern data. It looks like the forth ROM has its own character data, so what you'd see would be, at best, garbage. Sorry Blame the clever design...

Is there a forth implementation that loads to memory at 8-16k?

C

8-16K might give Kmurta (Toddy forth) a shout on that one.
If You could do me the honour of burning a 2764 I would be greatful Charlie, PM me where to to send it, how much for Your time and trouble etc and I'll post it off soon as.

Many thanks in advance.
Moggy

PS Your board maker has done You proud; slick design and a cool colour.

[sirmorris]

working.jpg (15.93 KiB) Viewed 15431 times

All systems are go.

[sirmorris]

Serial # 00001

back-1.JPG (165.94 KiB) Viewed 15431 times

front-1.JPG (182.77 KiB) Viewed 15432 times

[Moggy]

A thing of beauty good Sir Knight

[sirmorris]

I powered it up - issued a COMMAND"V" and got the version string back.. Yaay! Put in a card and ... RESET

Calmed down a bit, and resolved to start debugging. I got the firmware code up and remembered - thanks to a nice note that I left myself in the code - that I'd swapped around the reset and card-detect lines on P3 in order to make routing easier.

I quickly re-jigged the code and re-flashed the PIC chip - and it worked.

I can't tell you all how relieved I feel.

I'll be ordering 75 boards tomorrow.



Then I just have to build them ...

[Moggy]

I powered it up - issued a COMMAND"V" and got the version string back.. Yaay! Put in a card and ... RESET

Calmed down a bit, and resolved to start debugging. I got the firmware code up and remembered - thanks to a nice note that I left myself in the code - that I'd swapped around the reset and card-detect lines on P3 in order to make routing easier.

I quickly re-jigged the code and re-flashed the PIC chip - and it worked.

I can't tell you all how relieved I feel.

I'll be ordering 75 boards tomorrow.



Then I just have to build them ...

It just goes to show that it always pays to leave Yourself reminders
As for the numbers they will sell Charlie no two ways about it, I think the German Lads have put in a block booking

Regards Moggy

[UKRetroGamer]

75 is gonna take a LOT of soldering....

How long are you estimating it'll take to turn them all around?

[sirmorris]

Probably about 50 hours total. That's a lot of Speckled Hen... Which isn't necessarily a bad thing

[jegs2]

May have missed it, but does the device enable high-definition graphics?

Also, hopefully the internal 16K of my T/S 1500 won't pose a problem.

[Paul]

May have missed it, but does the device enable high-definition graphics?

Also, hopefully the internal 16K of my T/S 1500 won't pose a problem.

No HD-Graphics, sorry.
Only HiRes Graphics are supported
Its not 1920 × 1080, only 256*192.