Editing Atari STE General Maintenance (section)

== Socketed IC Maintenance ==

Fewer ICs are socketed on the STE compared to the earlier ST range. The GST MCU and GST Shifter are surface-mounted on most boards and cannot be removed. However, the following are typically socketed on both the 520STE and 1040STE:

<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table"
! IC !! Function !! Package !! Notes
|-
| MC68000 || CPU || DIP-64 (CA4003290) or QFP-68 SMD (some CA401177) || DIP versions can be reseated; SMD versions cannot.
|-
| TOS ROMs (2 chips) || Operating system || DIP-32 || TOS 1.62 or 2.06. Socketed for upgrades.
|-
| WD1772 || Floppy controller || DIP-28 || Socketed on most boards.
|-
| YM2149F || Sound PSG / PIO || DIP-40 || Socketed. Controls drive select, printer port, and legacy sound.
|-
| MC68901 (MFP) || Timers/interrupts/UART || DIP-48 || Socketed.
|-
| MC6850 (×2) || ACIAs (Keyboard/MIDI) || DIP-24 || Socketed.
|-
| BLiTTER || Graphics blitter || PLCC-68 || Socketed in PLCC socket.
|}

Reseat all socketed ICs as part of routine maintenance, as per the procedures described in [[Atari ST General Maintenance#Socketed IC Maintenance|ST General Maintenance — Socketed IC Maintenance]].