I've dusted off a project I built up ages ago to work on the firmware over the last few days. Originally just 8MB fast RAM and an ATA interface I bodged a few tracks and it now supports a mild overclock.
The CPLD is a Lattice ispMACH 4256V. Code in verilog - mine, not a port of any TF code. I enjoy doing the code and debugging (even when I'm tearing my hair out).
The CPU in it is a MC68000P10 - recycled from China & might be a remarked P8 I don't know. It runs at 13.7MHz stably though 8)
Dev board:
Obligatory SysInfo shot:
edit: the shame... the date stamp on the Gerbers is 17 March 2019 :?
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You can unban yourself if needed. It also sends me reports to investigate the ban.
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At this time, it is unfortunately not possible to whitelist users when your IP changes constantly.
You may inadvertently get banned because a previous attack may have used the IP you are now on.
So I suggest people only use fixed IP address devices until I can think of a solution for this problem!
A500 Fast RAM & IDE
Moderators: terriblefire, Terriblefire Moderator
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cmorley
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- Joined: 28 May 2019 17:46
A500 Fast RAM & IDE
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matt020
- Posts: 326
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- Location: West Australia
Re: A500 Fast RAM & IDE
Just trying to work out what you've got there....
A 68010 with 8Mb and IDE, yeah?
Would it not be easier just to buy a TF534 or the upcoming TF536 ??
A 68010 with 8Mb and IDE, yeah?
Would it not be easier just to buy a TF534 or the upcoming TF536 ??
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cmorley
- Posts: 296
- Joined: 28 May 2019 17:46
Re: A500 Fast RAM & IDE
Normal MC68000P10.
I'm interested in developing hardware so buying something is pointless.
I'm interested in developing hardware so buying something is pointless.
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matt020
- Posts: 326
- Joined: 29 Sep 2019 09:17
- Location: West Australia
Re: A500 Fast RAM & IDE
Yeah thats fair enough!
Can you add a 68030 to your board? That would be awesome!
An 030, with fastmem and an IDE port would be just right for an Amiga 500!
Can you add a 68030 to your board? That would be awesome!
An 030, with fastmem and an IDE port would be just right for an Amiga 500!
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dalek
- Posts: 232
- Joined: 08 Nov 2018 11:03
- Location: NSW Australia
Re: A500 Fast RAM & IDE
Looking good! You must be having fun :)
I would be stoked to ever get that far!
I would be stoked to ever get that far!
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terriblefire
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Re: A500 Fast RAM & IDE
There are at least 3 boards that are open source that do that. I think he wants to do his thing.matt020 wrote: 14 May 2020 15:02 Yeah thats fair enough!
Can you add a 68030 to your board? That would be awesome!
An 030, with fastmem and an IDE port would be just right for an Amiga 500!
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
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arkadiusz.makarenko
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Re: A500 Fast RAM & IDE
Sometimes it is just about journey, not about destination.
Do not trust people. They are capable of greatness.
~ Stanislaw Lem
~ Stanislaw Lem
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terriblefire
- Admin sponsor
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Re: A500 Fast RAM & IDE
Exactly. :)arkadiusz.makarenko wrote: 14 May 2020 18:56 Sometimes it is just about journey, not about destination.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
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matt020
- Posts: 326
- Joined: 29 Sep 2019 09:17
- Location: West Australia
Re: A500 Fast RAM & IDE
terriblefire wrote: 14 May 2020 16:10 There are at least 3 boards that are open source that do that. I think he wants to do his thing.
Ahh I getcha. In that case, nice work! Well done!
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cmorley
- Posts: 296
- Joined: 28 May 2019 17:46
Re: A500 Fast RAM & IDE
Jens has the high features end covered with the ACA500plus & terriblefire has the 680x0 covered so I am looking at something else. This dev board was initially only about fast RAM and IDE. I added some bodge wires to feed the 68K an separate clock. E and /VMA are now in the CPLD so the timers work correctly.
It boots at 16MHz but isn't stable. I don't know yet if that is my dev board, verilog or the 68K. Next is try a MC68HC000 on it. I bought some from 3 separate Chinese vendors... hopefully at least one chip will be genuine.
At the moment it is about understanding the 68K bus and the system. There is a lot of BS out there on the internet about how the Amiga works... source docs are useful but nothing beats an experiment.
It boots at 16MHz but isn't stable. I don't know yet if that is my dev board, verilog or the 68K. Next is try a MC68HC000 on it. I bought some from 3 separate Chinese vendors... hopefully at least one chip will be genuine.
At the moment it is about understanding the 68K bus and the system. There is a lot of BS out there on the internet about how the Amiga works... source docs are useful but nothing beats an experiment.
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