FS-A1WSX

{{refimprove|date=November 2011}}

{{Infobox information appliance

| name = Panasonic FS-A1WSX

| image = Fs-a1wsx msx2+.jpg

| image_size = 220

| caption = An FS-A1WSX

| type = Home computer

| family = MSX

| generation = MSX2+

| manufacturer = Panasonic

| releasedate = 1989

| display = Yamaha V9958 (aka MSX-Video)

| Sound = 3 voices (PSG) + 9 channel FM (OPLL)

| graphics = 512 × 212 (16 colours out of 512) and 256 × 212 YJK (19,268 colours)

| memory = 64 KB–256 KB (max.)

| os = MSX BASIC V3.0, MSX-DOS, CP/M

| storage = 720 KB 3.5" floppy disks

| predecessor = FS-A1WX

| successor = FS-A1ST Turbo R

| cpu = MSX-Engine T9769x

| CPUspeed = 3.58 and 5.37 MHz

}}

The Panasonic FS-A1WSX released in 1989 was the last MSX2+ made by Panasonic.{{Cite web |title=FS A1 WX / WSX Panasonic |url=https://www.old-computers.com/museum/computer.asp?st=1&c=621 |access-date=2023-05-22 |website=www.old-computers.com}}{{Cite web |title=Panasonic FS-A1WSX |url=https://www.msx.org/wiki/Panasonic_FS-A1WSX |website=MSX Resource Center}} It was the successor of FS-A1WX and incorporated few changes like S-Video output, no tape support, color printer support and an improved A1 Internal Cockpit software with a Kanji color word processor.

Contrary to other MSX2+ systems the Panasonic FS-A1 used a Z-80 compatible MSX-Engine (T9769x) which could be switched via software to 6 MHz. This model supported up to 256 KB of RAM after doing a little soldering. 512 KB was also possible with a more complicated modification.