I've a problem with a 1040 STF.
The 1Mb is composed of 32 chip.
It is possible to scan only the first 512Kb, and after the last 512kb ?
The banks are named like this in my computer :
U3 U4 U5 U6
U10 U11 U12 U13
U18 U19 U20 U21
U22 U23 U24 U25
U27 U28 U29 U30
U34 U35 U36 U37
U39 U40 U41 U42
U44 U45 U46 U47
There are no logic with the numbers written on the motherboard. The blue Chip are for the first 512Kb, and the red, the second bank of 512kb.
Is a way to test each chip (i think not), or a software to do ?
Is my stf could boot with a missed chip on the motherboard ?
To fix my problem, i bought on ebay 32 capacitors of 220nF to replace all next the chips. (waiting to receive it).
I've a 520STF working all the tests, i can remove a memory chip, solder an header, desolder one by one, each chip, and testing on the 520stf to find if one is dead... So if i'm not luncky, i can dessolder 32 chip to find the last dead :/
Or, better way, is the 1040stf should boot, if i remove R71 / R72 / R73 and let all the chip on the motherboard (like this i think my 1040 become a 520) and test only fist 512kb ?
If yes, if the 1040 boot with 512k, and test are ok, if i resolder R71/R72 / R73 and dessolder R62 / R63 / R64 will my atari boot could boot with 512kb, on the second bank ???
If i ask some technical question like this, it's because it's not an STE with a SIMM module :/ and evitate to desolder 32 chips who had 16 pads ... so 512 pins :/ with the capacitor... 32 * 2 (64 pins too), the resistances 6 * 2 (12 too). In fact i have to desolder 512 + 64 + 12 = 588 pads !!!
In YAART 1.8 i got errors in 0x046a50.
1040 STf + 4oGb IDE + RTC + TOS 4x + Gotek HxC
1040 STe + Gotek HxC
520 STe + Gotek HxC