J.Derrick@newcastle.ac.uk (James Derrick) (10/29/90)
Has any kind soul out there got details/know of a ftp site with hardware
details for any of the following:
Shugart floppy drive connections [are datalines TTL? {for muxing}]
Details of high density drives [to design a interface for the STe]
SCSI hard drive connections
PC keyboard for the ST [I heard of this ages ago- anyone know?]
STe alog joysticks/lightpen [no joy even after tracing the board!]
Also I'm after an inexpensive SCSI harddrive to go with a ICD host adapter
[about 60Mb ->ST177N?] -anyone got a dusty mac they don't want anymore... :-)
I'm currently converting my STe to a Towercase with a harddrive and switches
for booting, extra drives, reset, drive track monitor, coffee machine
controller, etc and would find these details very usefull.
BTW, tower case conversions are quite easy [I'm addicted to the smell of
burning solder flux!]. Get a case and recover half of your desk!
Thanks in advance,
James.
| James Derrick PtIV Microelectronics Newcastle Univ. 'Don't Panic: |
| 'Bringing you the future as soon as we understand today' computers can |
| JANET: J.Derrick@uk.ac.newcastle smell panic!' |
| SNAIL: Ethel Williams Hall, Eastfield Road, Benton. NE12 9TY. ENGLAND |hyc@math.lsa.umich.edu (Howard Chu) (10/30/90)
In article <1990Oct29.120422.21737@newcastle.ac.uk> J.Derrick@newcastle.ac.uk (James Derrick) writes: >Has any kind soul out there got details/know of a ftp site with hardware >details for any of the following: > Shugart floppy drive connections [are datalines TTL? {for muxing}] The spec sheet for the WD1770/1772 floppy controller, which is used in the ST, says the 8-bit databus is capable of driving 1 standard TTL load or 3 LS loads. > Details of high density drives [to design a interface for the STe] High density floppy drives can be driven directly, merely by replacing the 8MHz clock feeding the WD1772 with a 16MHz clock. Note that the WD1772 chips are only spec'd for up to 10MHz operation, so this isn't a sure-fire solution. I don't know what kind of replacement controller is supplied with, say, the PowerDrive kit. Btw, I see in Computer Shopper that 2.88MB floppy drives are now available for around $150 each. Given the average price of 1.44MB drives at around $65-90, that's not too bad. If I knew enough about these I'd consider sticking one of 'em in... > SCSI hard drive connections Read the comp.periphs.scsi newsgroup. They're full of SCSI info, and can also point you to archives with the full SCSI spec and lots of other stuff. > PC keyboard for the ST [I heard of this ages ago- anyone know?] Bleah. PC keyboards are disgusting. (Oh, sorry. "IMHO". }-) > STe alog joysticks/lightpen [no joy even after tracing the board!] Dunno, have you tried just plugging in, say, Apple or PC analog sticks? >Also I'm after an inexpensive SCSI harddrive to go with a ICD host adapter >[about 60Mb ->ST177N?] -anyone got a dusty mac they don't want anymore... :-) Lessee... In Computer Shopper I see that a 60MB ST177N, bare, is $349. Not bad. 20ms access, also not bad. I just ordered a Syquest (44MB cartridge) drive for $530. Slower, and more expensive to start, but I figure it'll be a win by the time I buy my second cartridge. (Heck. The atari.archive stuff won't even fit onto 1 cartridge now. Guess I should've ordered extra carts at the outset... }-) >I'm currently converting my STe to a Towercase with a harddrive and switches >for booting, extra drives, reset, drive track monitor, coffee machine >controller, etc and would find these details very usefull. Coffee machine controller?? Geeze..... }-) Can't you get that sort of functionality using a BSR-X10 Powerhouse controller? >BTW, tower case conversions are quite easy [I'm addicted to the smell of >burning solder flux!]. Get a case and recover half of your desk! Sounds cool. Got any notes you could share? >Thanks in advance, >James. -- -- Howard Chu @ University of Michigan Mac// - adv., q.v. MacToo, e.g. McHave a McHappy McDay! McThanks, McYou MacToo!
Roger.Sheppard@bbs.actrix.gen.nz (11/21/90)
<1990Oct29.234258.22858@math.lsa.umich.edu> Sender: Followup-To: Distribution: Organization: Actrix Information Exchange, Wellington, New Zealand Keywords: hardware, SCSI, ST, ATARI Comment-To: hyc@math.lsa.umich.edu Some notes on using O.E.M disk drives on Ataries the Driving power of the YM-2149 that is used to drive the drive select and side select is only one LS load, this meens that all O.E.M. drive fall out side the specs, they use 1 K Pull up resistors, you will find that on Atari Drives that these are removed or replaced with 2.7 K resistors, Note: this is only on the Side select and Drive select lines.. There was some info on this in a Elector Mag. some time back I still have the Mag: but not handy at the moment, but it was on about putting a Buffer in those lines 7417 i think I have never seen any othere mentions of this that the YM-2149 OPs are only 1 LS load..