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Search: Posts Made By: jasonsbeer
Forum: support.Hardware 31 July 2020, 17:31
Replies: 3
Views: 261
Posted By jasonsbeer
I'm going to partially answer my own question....

I'm going to partially answer my own question. The bits are read out from high (15) to low (0). I was counting them from low to high, which was causing me a bit of confusion. I ended up pulling all...
Forum: support.Hardware 30 July 2020, 01:07
Replies: 3
Views: 261
Posted By jasonsbeer
Greetings all- My question for now is how to...

Greetings all-

My question for now is how to interpret the diagrom output for the chip ram test. Being an A2000, I'm only expected a 16 bit output, but there are 32 bits reported? Please help me...
Forum: support.Hardware 28 July 2020, 01:57
Replies: 7
Views: 288
Posted By jasonsbeer
Maybe. Depends on the manufacturer. Many (not...

Maybe. Depends on the manufacturer. Many (not all) manufacturers designate their 256k x 4 DRAM with a part number containing or ending with 4256-xx. Where the xx is the speed of the DRAM. The bill of...
Forum: support.Hardware 27 July 2020, 19:55
Replies: 7
Views: 288
Posted By jasonsbeer
This. The part numbers can be confusing, but Rev...

This. The part numbers can be confusing, but Rev 5 and up all used 256k x 4 DRAM. Earlier revisions all used 256k x 1.
Forum: MarketPlace 25 July 2020, 22:44
Replies: 7
Views: 406
Posted By jasonsbeer
I went back and reviewed the missing/broken keys....

I went back and reviewed the missing/broken keys. Turns out I have the CTRL key, but in addition to the other keys, I need the TAB and ALT keys. My original list was pulled from my head. Do you have...
Forum: MarketPlace 24 July 2020, 22:29
Replies: 7
Views: 406
Posted By jasonsbeer
Yeah...I have a project keyboard here. Looks like...

Yeah...I have a project keyboard here. Looks like something was dropped on it. The top of the case is busted up, but the keyboard assembly appears to be just fine, sans missing and broken key caps.
...
Forum: MarketPlace 24 July 2020, 17:55
Replies: 7
Views: 406
Posted By jasonsbeer
Do you know what kind of keyboard mechanism this...

Do you know what kind of keyboard mechanism this is? I'm looking for a keyboard with the greenish (sometimes yellowish) rubber plungers under the keys...made by Mitsumi.
Forum: support.Hardware 09 July 2020, 01:46
Replies: 3
Views: 261
Posted By jasonsbeer
Amiga 2000 Rev 6.3 Diagrom Output

Finally getting some life out of this machine...here is the diagrom output over serial. What to make of the UDS/LDS test fails? The lines beep out fine between agnus and 68000. Both Agnus and 68000...
Forum: project.SPS (was CAPS) 07 July 2020, 18:02
Replies: 38
Views: 8,923
Posted By jasonsbeer
I came across this a couple months back when I...

I came across this a couple months back when I was thinking about building a DOS box.

https://www.dosgames.com/

My Abandonware has games for most every platform. Amiga & DOS included. It's a...
Forum: support.Hardware 18 June 2020, 20:53
Replies: 7
Views: 362
Posted By jasonsbeer
Mouser part # 571-1-5530843-0 Mouser does...

Mouser part # 571-1-5530843-0

Mouser does not have the part defined correctly, but that's the correct part number.

Here you go...digikey has them. Part #A144213-ND.
...
Forum: New to Emulation or Amiga scene 17 June 2020, 19:43
Replies: 18
Views: 1,392
Posted By jasonsbeer
I'm jelous! It's a good way to handle...

I'm jelous!



It's a good way to handle ADF files, but not individual programs/non-adf files. You can also use CD's or ethernet, with the correct equipment.



Some games only work on KS1.x....
Forum: support.Hardware 14 June 2020, 17:09
Replies: 8
Views: 366
Posted By jasonsbeer
I came across this last night while googling...

I came across this last night while googling external disk drive options for the Amiga. Looks to be an adapter to make PC drives work with the Amiga. That would save the need to mod the drive.
...
Forum: support.Hardware 12 June 2020, 17:22
Replies: 8
Views: 366
Posted By jasonsbeer
The A2000 is designed to handle two internal...

The A2000 is designed to handle two internal floppy drives. Put a jumper on J301 and it will look for DF1 internally. This lets you put either drive as DF0 or DF1.
Forum: support.Hardware 11 June 2020, 03:10
Replies: 5
Views: 342
Posted By jasonsbeer
I've been studying this as well. I have not...

I've been studying this as well. I have not attempted this yet, but here's what I think I know...

1) You can connect a GoTek as DF1 internally, but you need an amiga specific floppy cable with...
Forum: Amiga scene 10 June 2020, 06:09
Replies: 731
Views: 84,882
Posted By jasonsbeer
SATA support is a great idea.

SATA support is a great idea.
Forum: support.Hardware 07 June 2020, 06:20
Replies: 7
Views: 337
Posted By jasonsbeer
Your eyes do not deceive you. You should have...

Your eyes do not deceive you. You should have continuity as you describe. I've been working on a rev 4.4 board and I think I've gone through everything so many times, I have the schematics memorized....
Forum: support.Hardware 04 June 2020, 22:37
Replies: 12
Views: 497
Posted By jasonsbeer
Life! Maybe... Observation: Amiga 2000 goes...

Life! Maybe...

Observation: Amiga 2000 goes straight to magenta screen on startup. No other colors or color changes. This behavior does not change with KS 1.3, Diagrom, or even no ROM in the...
Forum: support.Hardware 28 May 2020, 21:13
Replies: 12
Views: 497
Posted By jasonsbeer
That makes sense. I just need to be patient and...

That makes sense. I just need to be patient and wait for my logic probe.

BTW - I did get the diagrom today. I put it in and still black screen. Null modem is also on the way.
Forum: support.Hardware 28 May 2020, 20:58
Replies: 12
Views: 497
Posted By jasonsbeer
I'm still waiting on my logic probe and am using...

I'm still waiting on my logic probe and am using my multimeter. I wanted to follow up on this.

_ROMEN (enable) is pin 12 on the kickstart rom. It is fed by pin 21 on GARY. When I turn on the...
Forum: MarketPlace 27 May 2020, 20:41
Replies: 1,833
Sticky: Ebay Links
Views: 399,378
Posted By jasonsbeer
Amiga 1020 5.25 Drive

Not mine. I just saw this and thought I would share in case someone is interested. Located in the US.

https://www.ebay.com/itm/203003732952?ul_noapp=true
Forum: support.Hardware 27 May 2020, 18:15
Replies: 4
Views: 268
Posted By jasonsbeer
You should read this thread: ...

You should read this thread:

http://eab.abime.net/showthread.php?t=82824

As a reference, here are the original installation instructions for a 2.04 kickstart.
...
Forum: support.Hardware 24 May 2020, 22:23
Replies: 12
Views: 497
Posted By jasonsbeer
It goes straight to gray on the monochrome...

It goes straight to gray on the monochrome output. No aparent change in shades. So, probably black screen. There is a video signal. The GBS8200 I ordered has been stuck in shipping for a long time....
Forum: support.Hardware 24 May 2020, 20:49
Replies: 12
Views: 497
Posted By jasonsbeer
RP101 is shown as 4.7k on the Rev 4.x schematics...

RP101 is shown as 4.7k on the Rev 4.x schematics and 2.7k on the Rev 6.x schematics. Not sure if that is a typo or if is really different. I cannot make out what is written on the resistor pack to...
Forum: support.Hardware 24 May 2020, 06:24
Replies: 12
Views: 497
Posted By jasonsbeer
Amiga 2000 Reset Circuit Behavior

I am looking at a gray screen Amiga 2000, Rev 4.3. It has quite a bit of water damage.

I checked the reset voltage upon startup on pin 18 of the 68000. It stays at zero for about 1-2 seconds after...
Forum: Retrogaming General Discussion 23 May 2020, 22:08
Replies: 17
Views: 1,262
Posted By jasonsbeer
Please share.

Please share.
Forum: Nostalgia & memories 23 May 2020, 04:54
Replies: 25
Views: 2,668
Posted By jasonsbeer
:spin I had this in the back of my mind,...

:spin

I had this in the back of my mind, too. You have to consider the demographic of the typical hacker. I would think some (many) of them moved on because they grew out of it, got married, and...
Forum: Hardware mods 23 May 2020, 04:38
Replies: 29
Views: 2,832
Posted By jasonsbeer
That is an awesome project. Nice work! I can...

That is an awesome project. Nice work! I can really appreciate the built-in gotek support.

But, a comment, if I may...If I were to design an Amiga replacement board, I would ditch the DB23 floppy...
Forum: Nostalgia & memories 22 May 2020, 20:18
Replies: 25
Views: 2,668
Posted By jasonsbeer
Expertise? Interest? Both the C64 and 1541...

Expertise? Interest?

Both the C64 and 1541 drives were based upon 6502 architecture. Many games on the C64 were "protected" by using custom loading routines on the 1541. The 1541 was it's own...
Forum: support.Hardware 21 May 2020, 04:53
Replies: 14
Views: 782
Posted By jasonsbeer
Any luck making this work? I also want to...

Any luck making this work?

I also want to attach a gotek to the internal A500 floppy header as DF1. It sounds like you need the Amiga specific floppy cable because the twist is not the same as a...
Forum: Retrogaming General Discussion 18 May 2020, 04:13
Replies: 17
Views: 1,262
Posted By jasonsbeer
I'd be in for maybe 5, at most. Are you looking...

I'd be in for maybe 5, at most. Are you looking to make both male and female? I figure the DB23F part is more in demand due to video adapters. DB23M connectors would also be of benefit. I would...
Forum: Amiga scene 14 May 2020, 21:24
Replies: 57
Views: 9,406
Posted By jasonsbeer
This thread is a textbook definition of scope...

This thread is a textbook definition of scope creep. Proposal: create a buster replacement. Soon the thread goes all crazy and lands on an entire Amiga replacement project. This is why projects fail....
Forum: support.Apps 02 May 2020, 04:13
Replies: 81
Views: 12,366
Posted By jasonsbeer
So, what are the pros and cons to porting a more...

So, what are the pros and cons to porting a more modern file system, like EXT4 or ZFS, to the Amiga?
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