Oric computers, Super Oric

I know this topic has been mentioned many times before, but Is it possible
to use a 65816 running at 20mhz on the Oric in a similar fashion to the
SuperCPU on the C64?
That is that whilst in the positive edge of the 1Mhz phase, the CPU is
running at 20Mhz, and when in the negative edge, it slows to 1Mhz giving
control over to the existing ULA.
eg.
CPU ULA
nunun___ununun___

My ultimate dream would be a replacement board for the Oric Atmos, that
would contain the following enhancements...

1) Integrated D/D interface (Personally not bothered about H/D) like Cumana.
2) Software switch to toggle between PS/2 Serial Mouse and Midi interface
using a UART 6551
3) Powered joystick ports (Left and right like on Telestrat)
4) 128K or more banked (16K blocks) memory
5) 65816 running at 20Mhz (Effectively running at 10Mhz) but software
shitchable to 1Mhz.
6) Second AY-3-8912 splitting 3 channel L/R for Stereo
7) Vertical Retrace interrupt (IMHO a redesigned ULA would not be an Oric
anymore)
8) Composite Video Output (Aswell as UHF modulator and standard RGB output)
9) Use the speaker grill beneath the oric as a fan grill.
10) 'Surface' LED's on front for Power, D/D Access and CPU Speed.
11) Soft, Hard Reset and Power switch.
12) 3 registers for the D/A conversion of RGB signals in order to achieve 24
bit colour resolution and directly access border by means of a software
modifiable Sync line.

This should get some replies hehe
Twilighte

ddndnj$ngi$ XXXX@XXXXX.COM ...

Ha, I've plans for that, miam... :-)


Yeap, I had the same idea at first, too...
(problem is that the inactive phase of the cpu would be 2/3 of the complete
period, meaning that a 20 MHz cpu would only deliver 20/3 MHz of power...)


Would prefer memory cards instead (either MMC or SmartMedia or etc.)
The capacity of these memory cards would allow to use them both as floppy disks
or hard disks...


Again, using a faster than 1 MHz cpu is less easy to integrate into the Oric
than in the C64...
On the other hand, I've just designed my first 65816 card, it runs up to 16 MHz
for now and I shall try 20 MHz tonight :-)
(it has 32 KB of fast static ram and 128 KB of flash eprom, and it connects to a
USB host)


No need for a fan... At 16 MHz, none of the component on my card is even warm...


Erm... 24 bit colour is great, but where would you store a 24 bit-depth image ?
Even a 240x224 image would weight more than 157 KB...
Or, do you mean eight 24 bits registers to redefine the Oric palette like the
Multicoloric card ?

Cheers,

Fabrice

43147c06$0$303$ XXXX@XXXXX.COM ...

20 MHz, checked yesterday evening... :-)

On 2005-08-31 08:25:48 +0100, "Euphoric" < XXXX@XXXXX.COM > said:



WOW!!!! I'm always impressed on who damn much you know about this
stuff!!! Keep up the great work. Maybe one day we will truly have a
Super Oric :)

regards

Bob

PS. I really need to do a sig file for this newsreader!!!

"Bob" < XXXX@XXXXX.COM > wrote


I don't know about yours, but my Oric is super !

:oP


Steve M

> Or, do you mean eight 24 bits registers to redefine the Oric palette like

Yes, that's it.

Twi