@kipper2k

if this new card can give the mighty A1000 2MB Chip Ram that would be awesome !

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c64-2sids, A1000, A1200T-060@50(finally working!),A4000-CSMKIII
! My Master Miggies- Amiga 1000 & AmigaOne X1000 !
mancave-ramblings
X1000 I BELIEVE

Kipper - out of curiosity, how far down the road do you see that FPGA circuits will be mature and cheap enough to provide PowerPC CPU circuitry?

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That'll Put Marzipan In Your Pie Plate, Bingo
💻 Pro-Amiga, 🌍 Pro-Globalism, 🍅 Pro-Vegan, 🛦 Pro-NATO & 🇪🇺 Pro-Joint EU Defense Intervention Initiative

@matthey

68000 had 32BIT Address, but Amiga Logic had 24BIT Address that limited memory to maximum 16MB of RAM.

Don't you remember that?

To access memory with full 32BIT 68000 address space, and add more than 16MB on Amiga you had necessity of mapping it as Fast RAM.

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"When the Amiga came out, everyone [at Apple] was scared as hell." (J.L. Gassée, former CEO of Apple France and chief of devs of Mac II-fx, interviewed by Amazing Computing, Nov 1996).

@Raffaele

All 68000 had a 24 bit memory bus and couldn't access more than 16MiB normally. IIRC one could separate program and data accesses for both user and supervisor so 64MiB could be accessed using external hardware and a lot of software complications.

Quote:

kipper2k wrote: The 16 bit accelerator will be designed to work with the A500, A600, a1000, a2000 and CDTV ... ... the 32bit version for the A1200 should also fit in the CD32 ...

Sorry, but those piggyback boards are not my favourite, most Amigas where designed with proper adapters for extensions, that's why I believe you should use them if possible.

@OneTimer1

All the latest CD32accels ( Terrible fire etc) use the double female adapter to allow the accelerator/expansion boards to fit nicely inside the CD32. This allows plugins for video/keyboard and other options.

All this arguing about 16bit vs 32bit is rather irrelevant, the topic here is tg68 and not “real” 68k chips, and though tg68 was originally designed as “compatible enough for 68000 Atari”, it now exist in many varieties and can now handle hundreds of megabytes of RAM. Discussions about these cores can be found on the FPGA section of atari-forum.com.

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B5D6A1D019D5D45BCC56F4782AC220D8B3E2A6CC

Quote:

kolla wrote: All this arguing about 16bit vs 32bit is rather irrelevant, the topic here is tg68 and not “real” 68k chips, and though tg68 was originally designed as “compatible enough for 68000 Atari”, it now exist in many varieties and can now handle hundreds of megabytes of RAM. Discussions about these cores can be found on the FPGA section of atari-forum.com.

There are relevant concerns when upgrading the tg68 to a 32 bit address bus and 32 bit internal (ALU) operations.

1) Software which is not 32 bit addressing clean will fail (e.g. Amiga Microsoft Basic).
2) Software written/compiled for the 16 bit 68000 will be less efficient and timings will change as 32 bit operations become faster relative to 16 bit operations (better to implement the 68020 ISA if 32 bit).

@matthey

For pure 68000 compatibility, there is already this:
https://github.com/ijor/fx68k

On the MiSTer, when you choose 68000, it uses Fx68k and not tg68.

Tobiflex’ plans forward:
http://www.atari-forum.com/viewtopic.php?f=115&t=37146&start=225#p386107

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B5D6A1D019D5D45BCC56F4782AC220D8B3E2A6CC

Some Massive News - Accelerator now boots from SD card :)

Here is the info...



Accelerator booting from SD update

@kipper2k

High enough performance for most "classic" Amiga needs. Looks really good!