Search found 175 matches

by SteveBagley
Tue Sep 24, 2013 10:19 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 169
Views: 37241

Re: STe - Bad DMA Chip

Thats the thing though, the STE does have DMA buffers.. Its what made me think Atari thought there was bus problems and added the buffers on the STE, but as everyone knows, it didn't work, so Atari produced a updated DMA. They are on the ASCI port side of the DMA chip, I was thinking between the DM...
by SteveBagley
Tue Sep 24, 2013 9:15 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 169
Views: 37241

Re: STe - Bad DMA Chip

Along these lines, this post from Frank Lukas way back when caught my attention… Frank pretty much comes to similar conclusions to you. Specifically: Another problem occured with the DMA-chip (see my other post). A long time ago, in this computer the two ROM chips were replaced by six EPROMs with TO...
by SteveBagley
Thu Sep 19, 2013 10:42 pm
Forum: Hardware
Topic: VELOCE STE BOOSTER IMAGES
Replies: 22
Views: 4931

Re: VELOCE STE BOOSTER IMAGES

Though I could understand Fast-Ram running at 16mhz, just like ROM, Though the whole ST-ram would have to be replaced on the veloce ( I dont know if it does or not) but the interesting thing is , it shows as running at 117%, not a big difference really though.. I do not know if it has "fast ra...
by SteveBagley
Thu Sep 19, 2013 9:11 pm
Forum: Hardware
Topic: VELOCE STE BOOSTER IMAGES
Replies: 22
Views: 4931

Re: VELOCE STE BOOSTER IMAGES

I've also been given it some thought -- which are outlined below. The ST and STE buses are virtually identical -- and run at 8MHz. The MegaSTE runs the CPU at 16MHz, but does so by using cache ram between the CPU and the main bus (which is still at 8MHz). This allows the CPU to access data from the ...
by SteveBagley
Wed Sep 18, 2013 10:44 am
Forum: Hardware
Topic: VELOCE STE BOOSTER IMAGES
Replies: 22
Views: 4931

Re: VELOCE STE BOOSTER IMAGES

Taking another look at the board, I do wonder where its generating the 16mhz from, It could be generated internally in the chips, though one day I might trace where the clock pin on the 020 cpu is going, its possible that the 020 cpu could be overclocked a little higher , though it depends where th...
by SteveBagley
Tue Sep 17, 2013 3:54 pm
Forum: Hardware
Topic: VELOCE STE BOOSTER IMAGES
Replies: 22
Views: 4931

Re: VELOCE STE BOOSTER IMAGES

Taking another look at the board, I do wonder where its generating the 16mhz from, It could be generated internally in the chips, though one day I might trace where the clock pin on the 020 cpu is going, its possible that the 020 cpu could be overclocked a little higher , though it depends where th...
by SteveBagley
Tue Sep 17, 2013 1:53 pm
Forum: Hardware
Topic: VELOCE STE BOOSTER IMAGES
Replies: 22
Views: 4931

Re: VELOCE STE BOOSTER IMAGES

At the very least, there will need to be some software that uses Maddalt() to register the extra RAM with TOS.
This rview suggests that it also configures the processor…

Steve
by SteveBagley
Thu Sep 12, 2013 10:11 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 169
Views: 37241

Re: STe - Bad DMA Chip

Remember the 25913 chip is successfully used in the Mega and STFM lines. Also, switching just the DMA chip on my STE fixed the issues with the HDD -- the driver and scsi controller (both GESoft -- a top link controller and their driver) worked fine for over a year until I switched to HDDriver which ...
by SteveBagley
Thu Sep 12, 2013 1:29 pm
Forum: Hardware
Topic: STe - Bad DMA Chip
Replies: 169
Views: 37241

Re: STe - Bad DMA Chip

Update: There's a C025913-38 inside. So, time to start hunting for a good one, or maybe a more recent STE. In the meantime, I'll just continue to use it until I see some sign of malfunction (doing frequent backups of the card of course). It's a really annoying bug -- my STe in the 1990s ran for goo...
by SteveBagley
Wed Sep 11, 2013 11:03 pm
Forum: Hardware
Topic: AdSpeed circuit diagram ?
Replies: 15
Views: 3026

Re: AdSpeed circuit diagram ?

I saw that Adspeed also mentions it can speed up TOS also. The only way I can think of is to simply check the /ROMx lines, then if any ROM is enabled then switch into 16mhz mode. I was just wondering how Adspeed did it more than anything, or at least what lines Adspeed was actually monitoring I ima...
by SteveBagley
Wed Sep 11, 2013 5:49 am
Forum: Hardware
Topic: AdSpeed circuit diagram ?
Replies: 15
Views: 3026

Re: AdSpeed circuit diagram ?

The circuit diagrams and GAL code for the MegaSTE would be a good place to start creating a replacement board, surely? Both of which are available online. The GAL code is in one of those isos full of atari internal files.

Steve
by SteveBagley
Sat Sep 07, 2013 9:38 am
Forum: Hardware
Topic: ST-BOOK ROM dump?
Replies: 199
Views: 41471

Re: ST-BOOK ROM dump?

ye its the ram drive think looking there is a push at to that address you can just nop it out and the tos wont make the ram drive do an auto install device and see if it pops up as drive P I don't think $D40000 and $E80000 are used for the ROM drive (P:), since they both lie outside the TOS 2.08 ch...
by SteveBagley
Fri Sep 06, 2013 11:50 pm
Forum: Hardware
Topic: ST-BOOK ROM dump?
Replies: 199
Views: 41471

Re: ST-BOOK ROM dump?

I wonder if Steem SSE supports this BIOS? I couldn't get it working. TOS 2.08 access memory at $D40000 during boot up which bus-errored in Hatari (possibly incorrectly -- my MegaSTE happily allows me to read from there) unless I set it up as a 14MB hybrid. And it needs to be in High-res. it's possi...
by SteveBagley
Fri Sep 06, 2013 11:07 am
Forum: Hardware
Topic: ST-BOOK ROM dump?
Replies: 199
Views: 41471

Re: ST-BOOK ROM dump?

can someone post the images are aok????? please... i ordered a new programmer as my copy willem is gubbed so it will take me 10 days or so to secure plcc 27c4002 and OTP and copies see last few pages for rom images I've booted it fine in Hatari without issue -- interestingly, it really doesn't unde...
by SteveBagley
Thu Sep 05, 2013 3:55 pm
Forum: Hardware
Topic: [PICS] Installing a Marpet XTRA Ram 8 in Mega ST
Replies: 20
Views: 3013

Re: [PICS] Installing a Marpet XTRA Ram 8 in Mega ST

I seem to remember there was a version of the XtraRAM +8 for the STe and MegaSTe as well. Evidence? Reading about it in the ST magazines back in the 1990s. In fact, there's a picture of the board in this issue of ST User -- http://www.atarimania.com/mags/pdf/atari-st-user-issue-97.pdf -- page 25. S...
by SteveBagley
Wed Sep 04, 2013 5:19 pm
Forum: Hardware
Topic: [PICS] Installing a Marpet XTRA Ram 8 in Mega ST
Replies: 20
Views: 3013

Re: [PICS] Installing a Marpet XTRA Ram 8 in Mega ST

busybee wrote:
alexh wrote:
busybee wrote:Could that also be installed on a Mega STE?

No. This connects to the MegaBus header which the MegaSTe doesn't have (it has VME instead).


Were any memory expansion boards ever made for the Mega STE?


I seem to remember there was a version of the XtraRAM +8 for the STe and MegaSTe as well.

Steve
by SteveBagley
Sat Aug 31, 2013 11:38 am
Forum: Hardware
Topic: Mega STE Noob
Replies: 10
Views: 3004

Re: Mega STE Noob

Never buy so old drives. They have low capacity, and expect short life-time. Additionally, they will not work with Mega STE, because it needs SCSI drive where can disable parity. And I did not hear about Quantum drives where it is possible. My old STe hard drive back in the 1990s (supplied by Compo...
by SteveBagley
Fri Aug 30, 2013 1:13 am
Forum: Hardware
Topic: ST-BOOK ROM dump?
Replies: 199
Views: 41471

Re: ST-BOOK ROM dump?

Well that seems to have worked -- I've just booted Hatari into the US TOS 2.08 :) Although you need to configure it with 14MB of memory or it bus errors (there's some accesses to 0xD00000 during boot). Interestingly, one Atari documentation file I've got on the ST Book lists two 256k system extensio...
by SteveBagley
Wed Aug 28, 2013 12:09 pm
Forum: Hardware
Topic: ST-BOOK ROM dump?
Replies: 199
Views: 41471

Re: ST-BOOK ROM dump?

Here you are, one generic(-ish) TOS ripper. I've tested this on Hatari, as well as my MegaSTE and Falcon (interestingly the MegaSTE was considerably faster than the Falcon at ripping 512k from 0xE00000 -- I guess the higher graphics res, and compact flash card/IDE really slow it down). It reads 512-...
by SteveBagley
Wed Aug 28, 2013 10:40 am
Forum: Hardware
Topic: ST-BOOK ROM dump?
Replies: 199
Views: 41471

Re: ST-BOOK ROM dump?

I'll knock a TOS ripper up over my lunch break, and upload it.
Steve
by SteveBagley
Tue Aug 27, 2013 10:22 pm
Forum: Hardware
Topic: ST-BOOK ROM dump?
Replies: 199
Views: 41471

Re: ST-BOOK ROM dump?

Just a thought but its not something as simple as a loose contact on those pins on your programmer, causing them to float to logic high?

Steve
by SteveBagley
Fri Aug 23, 2013 2:56 pm
Forum: Hardware
Topic: ST-BOOK ROM dump?
Replies: 199
Views: 41471

Re: ST-BOOK ROM dump?

ok so here is the reread image i checked it three times this time but i still need more otp roms to flash some havent ebayed for the correct ones let me know this copy is ok Hmm, byteswapping that file and looking at it in a hex editor strongly suggests that it hasn't been read properly (looks like...
by SteveBagley
Mon May 20, 2013 9:47 pm
Forum: Professionals
Topic: Cyrel Sunrise M16-1280 on MSTE
Replies: 18
Views: 2826

Re: Cyrel Sunrise M16-1280 on MSTE

IIRC the VME address space is mapped into a different location in the MegaSTE (0xA00000 to 0xDFFFFF) from the TT (0xFE000000-0xFEFFFFFF), which would probably explain the crash. The 68000 in the MegaSTE will ignore the high-byte of the addresses and write all over the system memory.

Steve
by SteveBagley
Tue Apr 09, 2013 11:52 am
Forum: Coding
Topic: horizontal scrolling on ST
Replies: 575
Views: 142958

Re: horizontal scrolling on ST

I expect it is possible for the reason you stated - probably one or more of those menus couldn't work with the memory available unless it's possible. But finding some details would be interesting. e.g. can it go down to 16 pixels or is it some crazy combination of horrible offsets and copies of the...
by SteveBagley
Sun Apr 07, 2013 9:12 pm
Forum: Chat forum [ENG]
Topic: Font conversion ?
Replies: 3
Views: 1513

Re: Font conversion ?

If you mean GDOS bitmap fonts (.FNT files), then it would be very hard to convert them to TrueType (since you would need to convert the bitmaps into vectors first, and then convert those vectors into a TrueType font -- and that's ignoring hinting. You could produce bitmap postscript Type3 fonts rela...

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