Editing Atari 1027 (section)

=== Electronics ===

{| class="wikitable styled-table" style="width:100%; text-align:center;"
|+'''Main parts (FD100670 parts list, p. 5-11)'''
! Location !! Part !! Atari part number
|-
| A1 || 8049 microprocessor, custom, with 2 KB ROM and 128 bytes of RAM || FC100619
|-
| A2 || 14050 hex buffer || FC100629
|-
| A3 || 74LS09 || FC100632
|-
| A4 || 17806P regulator (6 V) || FC100611
|-
| A5 || 17805P regulator (5 V) || FC100612
|-
| A6 || LB1259 transistor array || FC100630
|-
| C1 || 15,000 µF 25 V capacitor || FC100627
|-
| D1 || Rectifier || FC100628
|-
| XTL1 || 6 MHz crystal || FC100631
|-
| IR2 || Ink roll || FC100626
|-
| ADP || AC adaptor || FC100623
|}

The adaptor is rated 9.5 V at 40 VA. The board rectifies it and regulates two rails: Vc, 5 V ±5 %, for the logic and sensors, and Vp, 6 V ±10 %, for the stepper motors, DC motor and solenoids.<ref name="fsm" /> The FAQ lists the adaptor as 9.5 V AC, 4.2 A, Atari CO61636.<ref name="faq" /> Atari's schematic shows a 5 A fuse inside the adaptor.<ref name="fsm" /> The LB1259 drives the two steppers with two-phase excitation and clock pulses of about 5 ms; solenoid B (hammer select) takes a pulse of about 10 ms and solenoid A (character select) one of about 8 ms. The power-on reset holds the 8049 for about 100 ms, and the crystal runs at 6 MHz ±0.3 %.<ref name="fsm" />