[TUHS] 68k prototypes & microcode

[Jason Stevens]

You might find this interesting

https://twitter.com/i/status/1320767372853190659
<https://twitter.com/i/status/1320767372853190659> 

It's a pi (arm) running Musashi a 68000 core, but using voltage buffers it's
plugged into the 68000 socket of an Amiga!

You can find more info on their github:

https://github.com/captain-amygdala/pistorm
<https://github.com/captain-amygdala/pistorm> 

Maybe we are at the point where numerous cheap CPU's can eliminate FPGA's?

	-----Original Message-----
	From:	Michael Parson [SMTP:mparson at bl.org]
	Sent:	Friday, February 05, 2021 10:43 PM
	To:	The Eunuchs Hysterical Society
	Subject:	Re: [TUHS] 68k prototypes & microcode

	On 2021-02-04 16:47, Henry Bent wrote:
	> On Thu, Feb 4, 2021, 17:40 Adam Thornton <athornton at gmail.com>
wrote:
	> 
	>> I'm probably Stockholm Syndrommed about 6502.  It's what I grew
up on, 
	>> and
	>> I still like it a great deal.  Admittedly register-starved (well,

	>> unless
	>> you consider the zero page a whole page of registers),
but...simple, 
	>> easy
	>> to fit in your head, kinda wonderful.
	>> 
	>> I'd love a 64-bit 6502-alike (but I'd probably give it more than
three
	>> registers).  I mean given how little silicon (or how few FPGA
gates) a
	>> reasonable version of that would take, might as well include
65C02 and
	>> 65816 cores in there too with some sort of mode-switching
instruction.
	>> Wouldn't a 6502ish with 64-bit wordsize and a 64-bit address bus
be 
	>> fun?
	>> Throw in an onboard MMU and FPU too, I suppose, and then you
could 
	>> have a
	>> real system on it.
	>> 
	>> 
	> Sounds like a perfect project for an FPGA.  If there's already a
6502
	> implementation out there, converting to 64 bit should be fairly
easy.

	There are FPGA implementations of the 6502 out there. If you've not
seen
	it, check out the MiSTer[0] project, FPGA implementations of a LOT
of
	computers, going back as far as the EDSAC, PDP-1, a LOT of 8, 16,
and 32
	bit systems from the 70s and 80s along with gaming consoles from the
70s
	and 80s.

	Keeping this semi-TUHS related, one guy[1] has even implemented a
	Sparc 32m[2] (I think maybe an SS10), which boots SunOS 4, 5, Linux,
	NetBSD, and even the Sparc version of NeXTSTEP, but it's not part of
the
	"official" MiSTer bits (yet?).

	-- 
	Michael Parson
	Pflugerville, TX
	KF5LGQ

	[0] https://github.com/MiSTer-devel/Main_MiSTer/wiki
	[1] https://temlib.org/site/
	[2] https://temlib.org/pub/mister/SS/