- #Improving amiga os 3.9 generator#
- #Improving amiga os 3.9 drivers#
- #Improving amiga os 3.9 update#
- #Improving amiga os 3.9 driver#
The Merlin and Tseng drivers now disable the display while modifying some of the chip registers. 
#Improving amiga os 3.9 driver#
The new driver attempts to work around this problem as much as possible.
Due to hardware issues, previous Tseng chip drivers may have hung the system while waiting for the completion of a blitter operation. particularly critical phase are mode changes, which should be avoided if possible. The new Tseng driver is now extra careful to verify that the correct data has been written for some particularly critical registers, though not for all registers. Due to hardware design issues, the TsengET4000w32 chip may see false data on write requests to its registers, causing hangs or blitting defects on its screen. If you really want to try higher clock frequencies (on your own risk), set the tool type OVERCLOCK=YES in the monitor icon. #Improving amiga os 3.9 generator#
Thus, the default setting of the card now disables all settings of the clock generator that generates pixel clocks beyond this limit.
Due to bad routing, the clock generator of the Merlin card cannot feed clock rates higher than 80Mhz into the chip, even if this clock is later on divided down in the Tseng chip. Fixed a MuForce hit in the Merlin card driver. #Improving amiga os 3.9 update#
NOT EVEN MERLIN BOARD UPDATES WILL COMPLETELY ELIMINATE ALL SUCH ISSUES, AND YOU SHOULD REPLACE OR UPDATE THE MERLIN CARD BY A MORE ROBUST DESIGN. NOTE THAT THE MERLIN CARD HAS A COUPLE OF SERIOUS HARDWARE ISSUES THAT CANNOT BE WORKED AROUND COMPLETELY BY SOFTWARE, AND THAT THIS CARD MAY CRASH OR HANG YOUR SYSTEM, DESPITE OUR BEST ATTEMPTS TO AVOID SUCH PROBLEMS.
Quite a number of improvements have been performed on the Merlin and TsengET4000w32 drivers as listed below, however. To prevent usage of the (then non-present) blitter, set the tooltype NOBLITTER=Yes in the monitor icon of the oMNiBus monitor. In such cases, attempting to blit will fail or hang the system. Users of the oMNiBus card beware! The card driver may use the TsengET4000W32 chip driver, even with earlier releases of the Tseng chip that do not include a blitter. The mask was used correctly for interleaved or non-interleaved planar to planar blits. BltMaskBitMapRastPort() did not use the right modulo for the mask if the source bitmap was interleaved and planar and the destination bitmap was chunky or direct color. This was another old bug left over from the 2.x release if a chunky mode was opened with a depth smaller than 8. BltMaskBitMapRastPort() did not work correctly if the target screen did not have the full depth, i.e. Before, the limit was set to 4095 bytes, causing wrong blits on some large screens. The S3Virge blitter can process at most 4064 bytes per row. The Virge driver now adds a workaround by avoiding problematic bitmap widths. The S3Virge blitter has a bug and "freaks out" if one attempts to perform blits of particular widths. 
The previous release broke the VBlank interrupt of graphics and might have loaded the VerticalTotal hardware register with nonsensical values. Any MMU table modifications require now the availability of the mmu.library. This means that P96 in Hyperion's PPC-based OS does not need separate licensing. This specifically includes the old V2.0 version, which is also the property of iComp GmbH.Ī pre-existing license betwen the P96 authors Tobias Abt & Alexander Kneer and Hyperion has been turned into a co-ownership of P96: Hyperion owns and maintains the PPC port of it, which is part of AmigaOS4 and successors. The only source for a legal registration of the P96 software package is iComp's web site. The shareware status of P96 V2.0 remains active: Re-distribution of this archive remains legal, as long as no money is charged and no claim about registration is made. Re-distribution of the new package is not allowed. It is commercial software, protected by copyright laws. P96 is an RTG software package for the Amiga. P96 used to be called "Picasso96", but since the family of Pablo Picasso does not like this name, we refer to it as "P96" for now and all times. 22 Operation and installation under UAE.
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