Terriblefire Accelerators

[dalek]

wow nice surprise! Didn't think you were a fan of putting an 030 on a CD32?

[8 Bit Dreams]

Woow!
Cool! Now it's time to get CD32

[terriblefire]

wow nice surprise! Didn't think you were a fan of putting an 030 on a CD32?

I needed a cheap / simple way of doing an SDRAM experiment. This is the best thing i could thing of. no complex connectors to solder.

[8 Bit Dreams]

What cpld is it? XC95144XL or XC95288XL?
Is this board 2 or 4 layer?

[terriblefire]

What cpld is it? XC95144XL or XC95288XL?
Is this board 2 or 4 layer?

XC95144XL and 4 layer.

100Mhz SDRAM on 2 layer wouldnt be a good idea.

[supaduper]

TF330 the Reveal !! , excellent Steve, I need to get a BOM together so I can gather the components

[8 Bit Dreams]

Exactly!
That is what i wanted to know!
I strongly recommend You to choose these SDRAM chips: AS4C16M16SA-6TIN
These are cheap, running @166Mhz, this will allow to go 64MB - that is enough for anything..

[terriblefire]

Exactly!
That is what i wanted to know!
I strongly recommend You to choose these SDRAM chips: AS4C16M16SA-6TIN
These are cheap, running @166Mhz, this will allow to go 64MB - that is enough for anything..

The design was around these guys

https://uk.rs-online.com/web/p/sdram/7824553

I suggest you stick to these unless you have a really good reason not to. Smaller chips have different pinouts and will not work.

[AEV80]

Excellent news about the TF330 terriblefire. I was hoping you'd do a 030 card for the CD32 due to their rarity and expense. Also happy you dropped the FPU, not really useful on a 030 card.

[terriblefire]

Ok. I have to add a single disable jumper and we're done.

Capture.JPG (168.81 KiB) Viewed 7963 times

Specs are : -

MC68030 @ 50Mhz or 25Mhz (fixed but selectable)
64Mb SDRAM @ 100Mhz (Burst Supported)
ZIII Autoconfig.
44 Pin IDE
Header for ESP8266
(can be used immediately with ESP zmodem firmware and Paula serial.device as a wireless modem for cheap CD32 networking
However the CPLD could be used to implement a faster UART if someone wants to do that later - probably be me).

Links
https://www.deviantart.com/adlerweb/art ... -575950438
https://github.com/jsalin/esp8266_modem