Search found 216 matches

by tzok
Sun Aug 09, 2020 11:34 am
Forum: Coding
Topic: Atari STE Blitter objects demo (new record)
Replies: 88
Views: 4088

Re: Atari STE Blitter objects demo (new record)

I may confirm it works just fine on a real Atari 1040 STfm:
https://youtu.be/YRCNRkYfyW0

by tzok
Sun Jul 26, 2020 5:15 pm
Forum: Coding
Topic: Atari STE Blitter objects demo (new record)
Replies: 88
Views: 4088

Re: Atari STE Blitter objects demo (new record)

Anima wrote:
Sun Jul 26, 2020 4:26 pm
Why did you replace the CPU? Was there a special reason for it?
It was supposed to fix the "bad DMA" problem, and actually it did. It also produces much less heat.
by tzok
Sun Jul 26, 2020 11:04 am
Forum: Coding
Topic: Atari STE Blitter objects demo (new record)
Replies: 88
Views: 4088

Re: Atari STE Blitter objects demo (new record)

I have noticed, that one of the balls is moving noticeably slower and more "shaky" than all the rest. On my STe (early production unit) demo runs fine, work field graphics seem to be fine, although some glitches happen on the bottom border (yet this may be caused by my upscaler). This is almost stoc...
by tzok
Sun Jul 26, 2020 10:46 am
Forum: Hardware
Topic: Power LED
Replies: 10
Views: 355

Re: Power LED

Looks very nice, but isn't it too light (the case)? Was it painted or retrobrighted?
by tzok
Wed Jul 22, 2020 11:30 pm
Forum: Hardware
Topic: Hardware 4MB / 1MB switch?
Replies: 1
Views: 125

Re: Hardware 4MB / 1MB switch?

He says, that one of the resistor is connected to pin 18 of the SIMMs (A9). He lifted on side of this resistor and connected to a switch. The switch is wired that in one position it disconnects this resistor from SIMMs (and lefts it HiZ/floating), and grounds the A9 on the SIMMs side, and on the oth...
by tzok
Wed Jul 22, 2020 9:52 pm
Forum: Hardware
Topic: Power LED
Replies: 10
Views: 355

Re: Power LED

I was replacing yellow and green LEDs in the newer type keyboard, with two red LEDs to match an older case. I haven't bored any holes, the 3 mm "flangeless" LEDs fitted just fine.

Here's the proof:
Image
by tzok
Wed Jul 22, 2020 9:29 am
Forum: Hardware
Topic: Identify This Board?
Replies: 26
Views: 924

Re: Identify This Board?

Similar boards were mounted also on early SF345 drives.

viewtopic.php?t=32094
by tzok
Wed Jul 22, 2020 9:04 am
Forum: Hardware
Topic: Power LED
Replies: 10
Views: 355

Re: Power LED

They are 3 mm LEDs, with a thin "flange", like Kingbright L-7104.

Yet, this LED in not software controlled by any means. It is bound to the +5V rail through a resistor. So the LED is not your problem. Keyboard works just fine without them.
by tzok
Sat Jul 18, 2020 4:07 pm
Forum: Hardware
Topic: Blitter for STfm worth it/needed?
Replies: 5
Views: 390

Re: Blitter for STfm worth it/needed?

The socket is a tricky part. I've bought a regular THT-PLCC68 socket and... bend its pins to fit pads on the board. https://obrazki.elektroda.pl/7401598700_1595088405_thumb.jpg https://obrazki.elektroda.pl/5023201000_1595088408_thumb.jpg https://obrazki.elektroda.pl/2801081800_1595088446_thumb.jpg h...
by tzok
Wed Jul 15, 2020 9:37 am
Forum: Hardware
Topic: Adding blitter to 1040STF (70789 board)
Replies: 5
Views: 334

Re: Adding blitter to 1040STF (70789 board)

As far as I remember, you have to cut two bridges on the board (near the blitter socket).
by tzok
Thu Jul 09, 2020 10:25 am
Forum: Gallery
Topic: Proper Atari ST gray and 3D printing
Replies: 20
Views: 14934

Re: Proper Atari ST gray and 3D printing

Update:
7044 - way too light
7038 - slightly too light
7030 - slightly too dark

There is nothing in-between 7038 and 7030 in the RAL palette :(
by tzok
Mon Jul 06, 2020 9:32 pm
Forum: Hardware
Topic: Does an Atari STE need maintenance?
Replies: 6
Views: 348

Re: Does an Atari STE need maintenance?

Nice and inexpensive replacement PSU is Mean-Well RD-50A (this is an industrial grade PSU module): https://obrazki.elektroda.pl/7265918000_1594070988_thumb.jpg Yet it is not 100% plug and play, you have to bore 2 holes in the original PSU baseplate (piece of metal that holds PSU board over the main ...
by tzok
Sun Jul 05, 2020 12:06 pm
Forum: Hardware
Topic: Does an Atari STE need maintenance?
Replies: 6
Views: 348

Re: Does an Atari STE need maintenance?

Atari ST didn't have any leaking parts, almost all parts were through hole (all capacitors were), no batteries. So it is not like A600 or some classic Apple models, where SMD capacitors leak, and destroy PCB.
by tzok
Thu Jul 02, 2020 12:15 pm
Forum: Hardware
Topic: My Atari Mega ST 1 has stopped recognizing the Mega File 30
Replies: 2
Views: 137

Re: My Atari Mega ST 1 has stopped recognizing the Mega File 30

These disks have almost 30 years today, over the decades their magnetic surface have degraded, and they are no more than museum exhibits today. They are extremely unreliable now. You may try to low level format it and hope it will work for some time, but you can be sure, that sooner or later, it wil...
by tzok
Sat Jun 20, 2020 4:22 pm
Forum: Games - General
Topic: Major Motion - different versions
Replies: 4
Views: 235

Re: Major Motion - different versions

Maybe, but they both state "Copyright (c) 1985 by Michtron". The second one does have a demo mode, and is more difficult to play.
by tzok
Sat Jun 20, 2020 2:14 pm
Forum: Games - General
Topic: Major Motion - different versions
Replies: 4
Views: 235

Major Motion - different versions

This was one of my favorite games on ST, and I had two versions of it - first difference is splash screen: https://obrazki.elektroda.pl/3775449900_1592662168_thumb.jpg https://obrazki.elektroda.pl/5013912100_1592662179_thumb.jpg But I remember that maps also differ in some areas. Does anyone know an...
by tzok
Thu Jun 18, 2020 3:24 pm
Forum: Hardware
Topic: newbie questions
Replies: 3
Views: 428

Re: newbie questions

1. You may either cut 2 pins of Yamaha chip, or cut a bridge on the board, and do a switch with relatively complicated wiring: https://www.atari-forum.com/viewtopic.php?f=15&t=32863 (this is for STe, for ST this may be a little more complicated). 2. Yes, there is Image Runner: http://atari.8bitchip....
by tzok
Tue Jun 16, 2020 10:12 pm
Forum: Hardware
Topic: 1040 STf with scrolling problem
Replies: 6
Views: 235

Re: 1040 STf with scrolling problem

Whoa - REV.A motherboard. The IMP MMU and Shifter don't look promising...
by tzok
Tue Jun 16, 2020 3:36 pm
Forum: Hardware
Topic: 3D Printable DIN-14 plug
Replies: 0
Views: 133

3D Printable DIN-14 plug

I've made a 3D Printable DIN-14 plug for the external FDD:
https://www.thingiverse.com/thing:4401894

P.S.
Good to see ATARI-FORUM.COM back on-line.
by tzok
Sat May 09, 2020 10:59 pm
Forum: Hardware
Topic: Connecting an UltraSatan to a Megafile 30
Replies: 4
Views: 370

Re: Connecting an UltraSatan to a Megafile 30

...I think the more serious problem may be with loading drivers for both drives, and also the cumulative partition number limit. ID of UltraSatan may be changed in its configuration utility.
by tzok
Sat Apr 18, 2020 3:45 pm
Forum: News & Announcements
Topic: New Atari Mega style case for STF / STFM / STE and Falcon, Maybe
Replies: 49
Views: 2930

Re: New Atari Mega style case for STF / STFM / STE and Falcon, Maybe

I really like the idea of keeping the original bottom part of the case. I'd insist on placing the keyboard connector on the add-on part, without need of modifying the original bottom part of the case. A good place for it would be right side, in the area where FDD originally was located. As for the f...
by tzok
Tue Apr 14, 2020 5:50 pm
Forum: Hardware
Topic: Megafile 60 problems
Replies: 57
Views: 4902

Re: Megafile 60 problems

So it doesn't see low level sectors on track 0. You have to (low level) format it prior to partitioning. Of course then you will lose any data that was left on it.
by tzok
Sun Mar 29, 2020 9:44 am
Forum: The Atari 8bit corner
Topic: Atari 800xl - bargain or steer clear?!
Replies: 4
Views: 2128

Re: Atari 800xl - bargain or steer clear?!

Not enough information to give any answer. It can be something trivial, as well as something beyond economical repair. Of course everything can be repaired/rebuild. Some chips may be hard to find, especially now, when borders are closed (and will likely stay closed for next year). Some of these chip...
by tzok
Mon Mar 09, 2020 7:30 am
Forum: Hardware
Topic: RTC megaST4
Replies: 6
Views: 854

Re: RTC megaST4

Pin 2 is grounded anyways, battery + to the anode of D4.

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