V1.5 booster compatibility issues with ultrasatan

Help & information about the STE V1 booster.
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V1.5 booster compatibility issues with ultrasatan

Post by exxos » Mon Feb 11, 2019 4:43 pm

V1.5 booster.

There seems to be a mixed bag of if the integrated blitter motherboards work or not. As such I am not recommending fitting the V1 or V1.5 plug in booster to those type of motherboards.

Issues with the hard drive Generally not been found or running unstable in "boosted mode" (working fine in 8MHz mode), needs the pull-up resistors on the DMA databus. As shown in this post.. viewtopic.php?f=17&t=1417#p15270

If this does not solve the problem then the firmware must be reprogrammed with the file below.

(709 Bytes) Not downloaded yet
This will also need pin 1 lifting away from the PCB, then wired to a 33R resistor and wired to pin 4 of the 74F257 (U405) which is how the V1 booster is wired. With this modification the booster will run at 32MHz (not 36Mhz or 40Mhz which is the built on oscillator).

I have taken this booster of sale the time being, maybe indefinitely I am not sure yet. I may produce a small batch in the coming months which wire up as the V1 did. Though as there is hardly any demand these boosters, it is not going to be high up on my to do list.
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
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