bryan@ihnet.UUCP (b. k. delaney) (11/17/86)
For those of you who want the ROM Patch for a 30% decrease in disk I/O time here is the correct info: old new Chip U7 Atari #C026165 0DC5 00 NC Adress 0DC7 0DC6 04 NC 0DC7 14 10 Old data 14 hex 0DC8 24 NC New data 10 hex 0DC9 0A NC Checksum of U7 (Data I/O Programmer) 29E4 (0DC7 = 14 old data) 29E0 (0DC7 = 10 new data) I used an Intel D27256 ihnet!bryan Bryan DeLaney AT&T Bell Laboratories Naperville, IL 312-979-6368
keeshu@nikhefk.uucp (Kees Huyser) (11/21/86)
In article <459@ihnet.UUCP> bryan@ihnet.UUCP (b. k. delaney) writes: > >For those of you who want the ROM Patch >for a 30% decrease in disk I/O time here is the >correct info: > old new >Chip U7 Atari #C026165 0DC5 00 NC >Adress 0DC7 0DC6 04 NC > 0DC7 14 10 >Old data 14 hex 0DC8 24 NC >New data 10 hex 0DC9 0A NC > >Checksum of U7 (Data I/O Programmer) >29E4 (0DC7 = 14 old data) >29E0 (0DC7 = 10 new data) >I used an Intel D27256 > ihnet!bryan > Bryan DeLaney > AT&T Bell Laboratories > Naperville, IL > 312-979-6368 > Brian is right! In my previous posting I made a mistake in the address to be changed.... Instead of 0DC7hex I wrote 0CD7hex; MY MISTAKE! sorry.... ^^^^ ^^^^ -- Kees | Kees Huyser | UUCP : keeshu@nikhefk.uucp | or: {[wherever]!seismo}!mcvax!nikhefk!keeshu | BITNET: U00212@HASARA5.BITNET | IF YOU BELIEVE DISCLAIMERS, YOU'LL BELIEVE ANYTHING!
iarocci@eneevax.UUCP (Bill Dorsey) (11/22/86)
Regarding the ROM patch, I thought it was necessary to invert a line in order to use an EPROM where a ROM used to be. It's been a long time since I've checked on this, though, so I could well be wrong. Would anyone care to dis- pell any thoughts I and others may have regarding this? Is it possible to simply plug in, say, a 27C256 into the ST and have it work? Also, what kind of access time is necessary? I ordered 200ns parts, but maybe 250ns parts could be used which are cheaper? -- ------------------------------------------------------------------------------- | Bill Dorsey 'Imagination is more important than knowledge.' | | - Albert Einstein | | 'He who has imagination without learning has wings and no feet.' | | - Joubert | | ARPA : iarocci@eneevax.umd.edu | | UUCP : [seismo,allegra,rlgvax]!umcp-cs!eneevax!iarocci | -------------------------------------------------------------------------------
braner@batcomputer.UUCP (11/22/86)
[] Is there anybody reading this who has an appropriate (EP)ROM programmer and wouldn't mind making a few copies of the speeded- up U7? Two related questions: What are the legal (i.e. copyright) problems, if any, in connection to person A making such a chip for person B? Also: is it better to wait for Atari's new ROMs (coming soon???) before embarking on a ROM modification spree? (Who knows: they might make them right this time --> no need for mods!) - Moshe Braner [former Apple II ROM twister]
turner@imagen.UUCP (D'arc Angel) (11/23/86)
> Regarding the ROM patch, I thought it was necessary to invert a line in order > to use an EPROM where a ROM used to be. It's been a long time since I've ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ i put in the rom patch into an intel 27256 on friday and have been running at a NOTICABLY faster disk access speed since, its worth the effort in my opion -- ---- These are days for the locust to eat - Winston Churchill Name: James M. Turner Mail: Imagen Corp. 2650 San Tomas Expressway, P.O. Box 58101 Santa Clara, CA 95052-8101 AT&T: (408) 986-9400 UUCP: ...{decvax,ucbvax}!decwrl!imagen!turner CompuServe: 76327,1575 GEnie : D-ARCANGEL
turner@imagen.UUCP (D'arc Angel) (11/23/86)
> [] > > Is there anybody reading this who has an appropriate (EP)ROM > programmer and wouldn't mind making a few copies of the speeded- > up U7? > send me some blanks and the usual SASE and i'll be glad to make you copies > Two related questions: What are the legal (i.e. copyright) problems, > if any, in connection to person A making such a chip for person B? > Also: is it better to wait for Atari's new ROMs (coming soon???) before > embarking on a ROM modification spree? (Who knows: they might make them > right this time --> no need for mods!) > good questions, i wish i had an answer, neil ????? > - Moshe Braner [former Apple II ROM twister] *** REPLACE THIS LINE WITH YOUR MESSAGE *** -- ---- These are days for the locust to eat - Winston Churchill Name: James M. Turner Mail: Imagen Corp. 2650 San Tomas Expressway, P.O. Box 58101 Santa Clara, CA 95052-8101 AT&T: (408) 986-9400 UUCP: ...{decvax,ucbvax}!decwrl!imagen!turner CompuServe: 76327,1575 GEnie : D-ARCANGEL
ravi@mcnc.UUCP (Ravi Subrahmanyan) (11/24/86)
[.......] In article <1569@batcomputer.tn.cornell.edu> braner@batcomputer.UUCP (braner) writes: >Also: is it better to wait for Atari's new ROMs (coming soon???) before ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ I realize this is the stuff rumours are made of, but is Santa really bringing us a ROM upgrade? Is there another set coming out at all (perhaps early next year)? BTW, is the ref. book from Atari on-track for coming out by Christmas time? N(o)e(i)l? Boy, oh boy, I can hardly wait already! Yabba dabba doos, everyone... -who, me?
bammi@cwruecmp.UUCP (11/26/86)
In article <1809@alvin.mcnc.UUCP> ravi@alvin.UUCP writes: >BTW, is the ref. book from Atari on-track for coming out by Christmas >time? N(o)e(i)l? > There is a very handy reference book available for the ST from Glentop. The book is very terse, and certainly is meant as a quick reference for people already familiar with the ST's hardware, OS & Gem. It serves that purpose very well. If you are looking for a book that tells all about Gemdos or aes/vdi etc, this is not for you. Title: The Concise Atari ST 68000 Programmers Reference Guide Author: Katherine Peel Foreword: By JT himself! Publisher : Gentop ISBN: 1-85181-017-X Mark Williams has supposedly written up excellent documentation on Aes/Vdi and Line A. Their present documentation describes bios, xbios, gemdos and of course the standard C libraries very well. If the additional documentation is of the same quality, then it will certainly be the one to have. Some people claim to have seen it, and have high praises for it. -- usenet: .....!decvax!cwruecmp!bammi jwahar r. bammi csnet: bammi@case arpa: bammi%case@csnet-relay compuServe: 71515,155
ref0070@ritcv.UUCP (Robert E. Fortin) (12/02/86)
Is ATARI incorporating this new change that speeds up disk I/O in a new
version of the ROMS ?
Anyone from ATARI care to comment?
Bob Fortin
{allegra seismo decvax}!rochester!ref0070chabris@husc2.UUCP (chabris) (12/02/86)
Regarding the ROM patch for faster disk I/O: David Small, designer of the Magic
Sac Macintosh emulator cartridge, recently posted a warning to CompuServe's
Atari16 Forum. He mentioned that he had examined the patch and believed it
would damage (or could possible damage) a user's disk drives and/or disks. I
don't remember all the other information except that he _strongly_ recommended
avoiding the patch. Contact him for more information.
--
-- Christopher F. Chabris
Dunster F-61
Harvard University
Cambridge, MA 02138
[HOME: 15 Sterling Road, Armonk, NY, 10504]
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