Search found 5953 matches

by exxos
Mon Jun 17, 2019 6:55 pm
Forum: TF534
Topic: exxos 534 blog - Atari
Replies: 44
Views: 507

Re: exxos 534 blog - Atari

Thats a pretty low score for fastram. The Amiga 2000 and CDTV rate the 534 at around 16mips when running in fastrom. Does the ST turn on the CPU caches/burst mode? mips, meaningless instructions per second... The caches are on. I turned them off now says 410%.... turning datacache on drops to 377%....
by exxos
Mon Jun 17, 2019 6:19 pm
Forum: TF534
Topic: exxos 534 blog - Atari
Replies: 44
Views: 507

Re: exxos 534 blog - Atari

I tried doing my own basic program just doing.. x = Maddalt&(4194304,4194304) But it trashes the floppy on the desktop :lol: :roll: :shrug: :shrug: IMG_4376.JPG EDIT: Did manage to boot from cart (cart was corrupted with names as well) and did get manage to get a score though.. IMG_4377.JPG
by exxos
Mon Jun 17, 2019 4:51 pm
Forum: TF534
Topic: exxos 534 blog - Atari
Replies: 44
Views: 507

Re: exxos 534 blog - Atari

So we have alt-ram between 4-8MB.. but the only software I know of is the monster software, but this does not seem to recognise or allocate the RAM, has anyone any ideas or any other software I could try ?

IMG_4375.JPG
IMG_4375.JPG (81.24 KiB) Viewed 27 times
by exxos
Mon Jun 17, 2019 3:48 pm
Forum: ELECTRONICS
Topic: APC SU1400 All lights flashing issue
Replies: 2
Views: 33

Re: APC SU1400 All lights flashing issue

Hmm that can't be right...

IMG_4367.JPG
IMG_4367.JPG (362.46 KiB) Viewed 12 times
IMG_4370.JPG
IMG_4370.JPG (183.13 KiB) Viewed 12 times

2 of the relays measured odd..

DISSECTION TIME!!!

IMG_4369.JPG
IMG_4369.JPG (400.66 KiB) Viewed 12 times

That looks pretty toasted to me.
by exxos
Mon Jun 17, 2019 2:08 pm
Forum: ELECTRONICS
Topic: APC SU1400 All lights flashing issue
Replies: 2
Views: 33

Re: APC SU1400 All lights flashing issue

These were a bugger to get out :roll: 4 of the relays are the same, so makes life a little easier.. now to see if they still exist... IMG_4364.JPG r1.jpg r2.jpg Original datasheets... RP920145.pdf az755.pdf The ones I think I am going to order are... https://uk.farnell.com/omron/g2rg2a424dc/relay-dp...
by exxos
Mon Jun 17, 2019 1:25 pm
Forum: ELECTRONICS
Topic: APC SU1400 All lights flashing issue
Replies: 2
Views: 33

APC SU1400 All lights flashing issue

So my APC 1400 would go for a few weeks, then just die with every light on the front flashing. APC's support pages just says "hardware failure" which is of no help. After searching the web for hours, it seems a couple people claim to have suggested its the relays inside going faulty. I came across a...
by exxos
Mon Jun 17, 2019 10:46 am
Forum: TF534
Topic: exxos 534 blog - Atari
Replies: 44
Views: 507

Re: exxos 534 blog - Atari

PhilC wrote:
Mon Jun 17, 2019 9:36 am
Apologies for supplying sub standard components
It does the same with my 030 Phil. I think they need a heatsink even if running at 33MHz.. I need to more tests... Difficult to diagnose when it wasn't working for 3 hours yesterday, now I can't get it to fail the same way.
by exxos
Mon Jun 17, 2019 8:25 am
Forum: TF534
Topic: exxos 534 blog - Atari
Replies: 44
Views: 507

Re: exxos 534 blog - Atari

Last night it wasn't working again when I passed out for the night.. turned it on several times thismorning and its working fine... I'm wondering if its suffering from wake up state issues as it seems to be alternating at random when its working and not working.. hard to prove as its not currently m...
by exxos
Sun Jun 16, 2019 11:25 pm
Forum: TF534
Topic: exxos 534 blog - Atari
Replies: 44
Views: 507

Re: exxos 534 blog - Atari

I made some progress with the floppy drive. Its actually loading GB6 now and running, but there is some slight graphics corruption and the scores are all reading 0% :shrug: But oddly it is stable. It seems to be relating to the CPU seeing DTACK during a DMA cycle. Of course its very hard to follow s...
by exxos
Sun Jun 16, 2019 9:04 pm
Forum: ALPHA USER BUILDS
Topic: Forgottenmyname - Progress - Part 2
Replies: 55
Views: 3047

Re: Forgottenmyname - Progress - Part 2

How you end up with V&H swapped ? I thought it was working originally ? Wasn't it you who put the ROM socket in wrong originally as well :)

RAM fault may well be a bad socket or solder joint on the RAM headers or MMU, or buffers..