Search found 18 matches

by scsilord
Fri Dec 18, 2020 8:08 am
Forum: Guides
Topic: Mega ST4 repairs - help, please
Replies: 36
Views: 1288

Re: Mega ST4 repairs - help, please

Unfortunately, the two TOS chips were unsalvageable due to rust. Several legs came off quite easily in the socket and in my fingers. The 68030 and 68882 chips have one or more pins broken off in their sockets. Some of the other chips may be in the same condition. The two long chips on the Mega boar...
by scsilord
Thu Dec 17, 2020 8:32 am
Forum: Guides
Topic: Mega ST4 repairs - help, please
Replies: 36
Views: 1288

Re: Mega ST4 repairs - help, please

If you get to a point where you need to figure out where a misisng trace went. I can make detailed pictures of a working board.
by scsilord
Thu Dec 17, 2020 7:40 am
Forum: Hardware
Topic: New board: MonSTer
Replies: 643
Views: 244517

Re: New board: MonSTer

Sent PM. One MegaSTE board.
by scsilord
Wed Apr 15, 2020 7:19 am
Forum: CT60 / CT63 Area
Topic: CT60e overclock HELP!
Replies: 9
Views: 8403

Re: CT60e overclock HELP!

I have no idea if this applies to the CT60 or CT63, but the CT60E doesn't boot at 66Mhz, it needs a little more. Setting 67Mhz in 030 mode does the trick for me.
by scsilord
Wed Feb 19, 2020 3:16 pm
Forum: Hardware
Topic: Modern replacement psu for Tt030 / Mega STE
Replies: 11
Views: 2015

Re: Modern replacement psu for Tt030 / Mega STE

Putting a momentary switch between motherboard power OK and GND is ok to start the TT. It's probably better in the long term to use something that makes the contact automatically after a few seconds to start the TT, I used a little PIC microcontroller to pulse once after 5 secs when the tt gets power.
by scsilord
Mon Feb 17, 2020 5:52 pm
Forum: Hardware
Topic: Modern replacement psu for Tt030 / Mega STE
Replies: 11
Views: 2015

Re: Modern replacement psu for Tt030 / Mega STE

The power OK pin needs a short pulse to GND, that will boot the TT.
by scsilord
Sat Dec 28, 2019 9:48 am
Forum: Hardware
Topic: Installing the PAK68/3
Replies: 141
Views: 28831

Re: Installing the PAK68/3

If the PAK and SST have anything in common it might be that ACSI is just real flaky with UltraSatan/CosmosEX/Gigadrive. I only got harddisk working properly with scsi converters that have buffers. Try the R/W reliabilty test from https://atari.8bitchip.info/ahpt.html it might tell you that there are...
by scsilord
Tue Oct 22, 2019 7:15 am
Forum: Hardware
Topic: External Floppy Problem When Gotek is Connected
Replies: 2
Views: 2963

Re: External Floppy Problem When Gotek is Connected

Shugart/Atari D0=A:\, D1=B:\ I haven't found any need to connect the M0 line on my goteks(FlashFLoppy & HxC), just leave it open. Atari and plenty 3rdparties usually assume that drives for internal or external use are configured as D0. The external port can carry D0 and D1 for early st models withou...
by scsilord
Fri Oct 04, 2019 12:35 pm
Forum: FireBee
Topic: Keyboard and monitor recomendations
Replies: 19
Views: 8303

Re: Keyboard and monitor recomendations

Out of curiosity, how would you fix it? :-) Dexterslab done it before on his TT. http://www.mr2.net/marknias/atari_tt030.html#Keyboard I have Mega ST keyboard with same kind of symptoms (keys are not completely defective, but not reliable anymore)... Is it same problem with Mega ST keyboard or some...
by scsilord
Tue Oct 01, 2019 1:06 pm
Forum: Hardware
Topic: Atari 520 STM no video
Replies: 3
Views: 2392

Re: Atari 520 STM no video

Hooking up to a tv makes me think you want to use a scart cable. A removed modulator could possibly mean that there was no csync circuit installed after removal. Scart needs composite video(made by modulator) or csync signal to get a image on screen. Csync isn't a very complex circuit and can be fou...
by scsilord
Sat Jul 20, 2019 6:04 am
Forum: CosmosEx
Topic: CosmosEx v1/v2 - Update
Replies: 22
Views: 9236

Re: CosmosEx v1/v2 - Update

From my experience the ce_raspbian_stretch_2018-05-10.img release had issues with the usb hub on the V1. For the v1 i used the yocto distro and used the script to get it up to date. I prefered rpi-ce-run-real over ce_raspbian_2017-01-03, because it boots faster. Bad news is that you have to wait unt...
by scsilord
Fri Jul 19, 2019 8:51 pm
Forum: CosmosEx
Topic: CosmosEx v1/v2 - Update
Replies: 22
Views: 9236

Re: CosmosEx v1/v2 - Update

Looks like the update zip is not on the website right now (404). Maybe the update is getting updated.
by scsilord
Fri Jul 19, 2019 3:20 pm
Forum: CosmosEx
Topic: CosmosEx v1/v2 - Update
Replies: 22
Views: 9236

Re: CosmosEx v1/v2 - Update

I had issues with upgrading to the latest version on a CosmosEx V1. The raspbian and yocto releases were all breaking when updating. My fix to get the latest software/firmware on a V1? Follow jookies guide on: http://joo.kie.sk/?page_id=518 , after running this on a clean yocto distro i'm now all up...
by scsilord
Tue May 07, 2019 12:41 pm
Forum: Hardware
Topic: Drive swap on STe without cutting pins/tracks
Replies: 26
Views: 8348

Re: Drive swap on STe without cutting pins/tracks

I have never actually checked if the drive heads move simultaneously. I did notice that the drive motors spin together and with 2 goteks A and B, that both displays update the current track and disk side. I will check if the heads all move at the same time or not. I slapped some arduino jumper wires...
by scsilord
Tue May 07, 2019 6:39 am
Forum: Hardware
Topic: Drive swap on STe without cutting pins/tracks
Replies: 26
Views: 8348

Re: Drive swap on STe without cutting pins/tracks

The way I got swappable drives working on MEGAST and MEGASTE was to separate and cut the DS0 wire in the ribbon cable.
And then i got creative by having 2x 3-dipswitchblocks. #1 with DS0, #2 with DS1 and let them switch between the cut ribbon cable and the 2 external DS's.
by scsilord
Sat Apr 27, 2019 6:33 am
Forum: Hardware
Topic: MegaSTE floppy cable - twisted or straight?
Replies: 4
Views: 1605

Re: MegaSTE floppy cable - twisted or straight?

Atari floppydrive connections are 1on1 from motherboard to drive.
I always mark the 1 side of motherboard connectors (floppy/scsi/acsi/serial) and I mark the drive pin1 on bottom/top/back of drives.
by scsilord
Sat Mar 09, 2019 10:56 am
Forum: Hardware
Topic: Floppy drive replacement (expanding the theme).
Replies: 40
Views: 9061

Re: Floppy drive replacement (expanding the theme).

My megaste came with a gotek(and buttonhole cut), i placed a sony mpf920 behind a really yellowed mitsumi atari st cover and after making room for the ejec button it fits relaxed. Perhaps it is missing a very important fact: I am trying to adapt a PC floppy disk in an ATARI ST. Other Atari models s...
by scsilord
Thu Mar 07, 2019 1:12 pm
Forum: Hardware
Topic: Floppy drive replacement (expanding the theme).
Replies: 40
Views: 9061

Re: Floppy drive replacement (expanding the theme).

My megaste came with a gotek(and buttonhole cut), i placed a sony mpf920 behind a really yellowed mitsumi atari st cover and after making room for the ejec button it fits relaxed.

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