THIS IS PRE-PRE-RELEASE SOFTWARE - USE AT YOUR OWN RISK!

Ok, after a round of musical patches with map@europa.ecn.uoknor.edu,
the interrupt level problem with some cards is fixed "for sure this time" :-)
Anyway, it worked on his system and it works on my "normal" system.

This is based on patch #1, so you can just apply the whole mess of
patches easily.
:ja

*** aha274x.c-rel5p1	Fri Sep 23 14:06:48 1994
--- aha274x.c	Fri Sep 23 14:09:42 1994
***************
*** 1,5 ****
  /*
!  *  @(#)aha274x.c 1.26 94/09/18 jda
   *
   *  Adaptec 274x device driver for Linux.
   *  Copyright (c) 1994 The University of Calgary Department of Computer Science.
--- 1,5 ----
  /*
!  *  @(#)aha274x.c 1.27 94/09/20 jda
   *
   *  Adaptec 274x device driver for Linux.
   *  Copyright (c) 1994 The University of Calgary Department of Computer Science.
***************
*** 439,450 ****
  
  	/*
  	 *  Check the startup flag - if no commands have been queued,
! 	 *  we probably have the interrupt type set wrong.  Unpausing
! 	 *  the sequencer will reload the host control register.
  	 */
  	if (p->startup) {
  		p->unpause ^= 0x8;
! 		UNPAUSE_SEQUENCER(p);
  		return;
  	}
  
--- 439,451 ----
  
  	/*
  	 *  Check the startup flag - if no commands have been queued,
! 	 *  we probably have the interrupt type set wrong.  Reverse
! 	 *  the stored value and the active one in the host control
! 	 *  register.
  	 */
  	if (p->startup) {
  		p->unpause ^= 0x8;
! 		outb(inb(O_HCNTRL(p->base)) ^ 0x8, O_HCNTRL(p->base));
  		return;
  	}
  
***************
*** 929,938 ****
  
  	/*
  	 *  Register IRQ with the kernel _after_ the host information
! 	 *  is set up, in case we take an interrupt right away.
! 	 *
! 	 *  XXX - the card is reset and disabled, so why would we be
! 	 *	  getting an interrupt?
  	 */
  	if (request_irq(irq, aha274x_isr, SA_INTERRUPT, "AHA274x/284x")) {
  		printk("aha274x couldn't register irq %d, ignoring\n", irq);
--- 930,937 ----
  
  	/*
  	 *  Register IRQ with the kernel _after_ the host information
! 	 *  is set up, in case we take an interrupt right away, due to
! 	 *  the interrupt type being set wrong.
  	 */
  	if (request_irq(irq, aha274x_isr, SA_INTERRUPT, "AHA274x/284x")) {
  		printk("aha274x couldn't register irq %d, ignoring\n", irq);
***************
*** 1011,1017 ****
  	return("Adaptec AHA274x/284x (EISA/VL-bus -> Fast SCSI) "
  	       AHA274X_SEQ_VERSION "/"
  	       AHA274X_H_VERSION "/"
! 	       "1.26");
  }
  
  int aha274x_command(Scsi_Cmnd *cmd)
--- 1010,1016 ----
  	return("Adaptec AHA274x/284x (EISA/VL-bus -> Fast SCSI) "
  	       AHA274X_SEQ_VERSION "/"
  	       AHA274X_H_VERSION "/"
! 	       "1.27");
  }
  
  int aha274x_command(Scsi_Cmnd *cmd)