Search found 230 matches

by tzok
Sun Oct 18, 2020 11:16 am
Forum: Hardware
Topic: [MegaST] what hw upgrades do I need in 2020
Replies: 27
Views: 1504

Re: [MegaST] what hw upgrades do I need in 2020

All in one solution would be CosmosEx, but there are some alternatives: 1) Display/Monitors SCART-RGB to HDMI converter (and optionally HDMI to VGA converter) 2) Drive Emulation Gotek with HxC or FlashFloppy firmware 3) HDD replacement UltraSatan 4) TOS/ROM Switchable 1.04/2.06 5) Other stuff? NetUS...
by tzok
Sun Oct 11, 2020 7:24 pm
Forum: Hardware
Topic: Sm125 only one white line.
Replies: 3
Views: 288

Re: Sm125 only one white line.

Jpnl wrote: Sun Oct 11, 2020 9:05 amthe monitor only shows one horizontal white line when the st is turned on.
So it means a problem with a vertical (the low frequency one) beam deflection circuit.
by tzok
Tue Sep 29, 2020 6:34 pm
Forum: Website Discussions
Topic: VCF has a Mega STE and wants advice
Replies: 3
Views: 398

Re: VCF has a Mega STE and wants advice

I'd go either for Frontier Elite intro or Xenon 2, which was by far the most impressive game for STe I remember. As for the demoscene I'd go for WE WERE "at" by Oxygene.
by tzok
Mon Sep 28, 2020 7:09 pm
Forum: Hardware
Topic: ACSI 2 SD
Replies: 9
Views: 804

Re: ACSI 2 SD

The peak performance DMA can deliver is about 1.8MB/s and it is possible to achieve with P. Putnik's ACSI CF interface (yet, it doesn't support autoboot).
2020-07-30 21.11.51.jpg
by tzok
Mon Sep 28, 2020 4:50 pm
Forum: Hardware
Topic: ACSI 2 SD
Replies: 9
Views: 804

Re: ACSI 2 SD

I haven't heard about the one on Cypress SoC, but I've seen the one on STM32 - it is a pity, that it was done on the Arduino IDE, as it has no support for DMA.
by tzok
Sun Sep 27, 2020 7:31 pm
Forum: Hardware
Topic: MMU doesn't generate /CAS signals.
Replies: 21
Views: 1079

Re: MMU doesn't generate /CAS signals.

Coupling between any two lines would be enough. Maybe this foam tape you mentioned on another forum, was the culprit? I also have a BLiTTER socket in my STfm and it makes no problem.
by tzok
Sun Sep 27, 2020 10:32 am
Forum: Hardware
Topic: MMU doesn't generate /CAS signals.
Replies: 21
Views: 1079

Re: MMU doesn't generate /CAS signals.

It could be a capacitive coupling, and not a direct short.
by tzok
Mon Sep 21, 2020 8:05 pm
Forum: Gallery
Topic: My mods and website info
Replies: 9
Views: 1395

Re: My mods and website info

How did you make the keycap stickers? Have you found some company which agreed to make it? I tried to order custom keyboard stickers once, but I couldn't find anyone who'd agree to make just a few sets. Minimal orders were like 100 sets.
by tzok
Mon Sep 14, 2020 3:37 pm
Forum: Hardware
Topic: SH204 Shocking Me
Replies: 3
Views: 440

Re: SH204 Shocking Me

It is normal that switching power supplies have about a half of mains voltage on their chassis. It is due to input line filtering capacitors. If chassis is "touchable" the device should be powered from the outlet with a PE terminal. Despite Atari itself has a plastic case, it also should be "grounde...
by tzok
Sun Sep 13, 2020 8:53 pm
Forum: Hardware
Topic: SH204 Shocking Me
Replies: 3
Views: 440

Re: SH204 Shocking Me

It could zap you if it is connected to the outlet without the PE (Protective Earth) pin.

For me, the best tools for diagnosing hard drive issues on Atari is ICD PRO. These drives are pretty unreliable now (after 30 years), so it might just die (cylinder 0 got corrupted).
by tzok
Fri Sep 04, 2020 2:42 pm
Forum: Hardware
Topic: AtariST 1040f Floppy Drive
Replies: 6
Views: 595

Re: AtariST 1040f Floppy Drive

Not all STFs had the long floppy button. None of the STf floppy drives I know had the belt to drive the floppy disk. I know only a very early ST external floppy drives (SF345) to have a such belt driven, single sided, floppy drives.
by tzok
Fri Aug 28, 2020 7:15 pm
Forum: Hardware
Topic: Atari 1040 STe Drive Swap Mod Problem
Replies: 5
Views: 653

Re: Atari 1040 STe Drive Swap Mod Problem

For Gotek it will be enough to connect pin 5 of DIN-14 to pin 10 of FDD connector. Pins 6 and 8 from DIN-14 may be left unconnected, as on STf/e pin 6 is never asserted, and Gotek ignores the Motor On signal. Pin 14 on Gotek is not connected at all. Depending on the jumper position (D1, D0, M0) Gote...
by tzok
Sat Aug 22, 2020 2:56 pm
Forum: Hardware
Topic: ATX connector to STe power diagram
Replies: 7
Views: 827

Re: ATX connector to STe power diagram

Seems ok, switch needs to be a toggle switch, not a momentary one.
by tzok
Sun Aug 16, 2020 2:02 pm
Forum: Hardware
Topic: ATX connector to STe power diagram
Replies: 7
Views: 827

Re: ATX connector to STe power diagram

Switch is PS-ON (green) to ground (black). Ground is black, +12V is yellow (blue on ST), and +5V is red (same as on ST). ST power connector is (from left/cartridge port to right/floppy drive): 1, 2: +5V, 3, 4, 5: GND, 6: +12V (formally the pin numbering is reversed). Here's a nice description: https...
by tzok
Sun Aug 09, 2020 11:34 am
Forum: Coding
Topic: Atari STE Blitter objects demo (new record)
Replies: 88
Views: 8569

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: 8569

Re: Atari STE Blitter objects demo (new record)

Anima wrote: Sun Jul 26, 2020 4:26 pmWhy 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: 8569

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: 992

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: 259

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: 992

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: 48
Views: 4916

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: 992

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: 807

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: 706

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: 17307

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 :(

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