go0se wrote: ↑Mon Apr 15, 2024 1:30 pm

dad664npc wrote: ↑Mon Apr 15, 2024 5:37 am If you want to use a Pi3/Pi2z and/or a PiStorm with 373 latches the you are on your own.

Seems somewhat less optimistic than the notes on the main page of your repo :

Experience always trumps early optimism.

But well spotted.

BW

I have a (self-hacked) combined composite/RGB cable for my Falcon which needs an external power supply to switch to RGB mode. The composite is truly dire. I wonder if this may be part of the issue (I had put it down to the terrible cable I employed). Definitely worth a goosey. Well found, exxos . BW

Has anyone looked at the schematic ? I mean by the looks of it, DATA line 0 is connected to address 1, A23 is connected to D7 :WTF: At its heart, PiStorm is a synchronously driven state machine acting as a multiplexer. 16 Pi lines connected to 39 68k lines and 16 CPLD lines. The flip-flops are used...

agranlund wrote: ↑Fri Apr 12, 2024 3:02 pm EmuTOS built-in driver + NVDI:
<snip screenshot showing 30x averages or so>

It's alright, I suppose...



BW

Now jump to the pistorm with 3,000% ROM speeds.. That be like 240mhz CPU. How much of that score is tainted by the CPU caches... Remember you're measuring (completely Pi-side) memory speeds there. Like testing ROM speeds after running MAPROM -- you're testing TT-RAM in that case. ROM speeds without...

I guess it can be configured with altram in 68k space or TTram space. For most stuff, I think altram be easier in 68k space as it won't screw up the blitter access. Then anyone who needs more ram can, just won't be blitter friendly. Blitter will have no access no matter where you map it. The map wi...

@Badwolf Does the thing copy ROM to the pi's own RAM and fake the address with the MMU like MAPROM does ? That would be amazing not having to go to the MB slower ROM all the time. MMU is not emulated, so no. At its base level it simply uses all motherboard resources. You can then map in extra bits ...

Remember to get that GPIO riser package I mentioned in PM too. Hang on. Just to clarify, Im sure I asked @Badwolf about using a Pi3B for this (using a riser because of the double stacked USB ports on the 3B) and Im sure I was warned by him not to use a GPIO riser because of signal degradation issue...

What was the reason for that over 373 ? Timings - some ATARI's work, some don't - you know all about that :) 373s (latches) latch on falling edge, 374s (flipflops) latch on rising edge, so there's a [minimum of] a half clock cycle difference if using the same firmware. All the work's been done on 3...

exxos wrote: ↑Wed Apr 10, 2024 8:05 pm Cool, my falcon ones won't fit then, I will order one off amazon or somewhere then. Shame rapid don't seem to sell them.

Falcon is also 2.54, but the expansion headers are 30 and 50 pin, IIRC. Pi4 is 40 pin.

Same as a (full size) IDE connector.

BW