I obtained this interesting and rare prototype or “Preproduction Validation Testing” (aka: Vegas PVT) Apple IIGS lately. It didn’t come with prototype memory card “Vegas” or “Zeus – RAM CARD” marked Expansion Memory card. The power supply looked regular GS powers upply just without the apple sticker on top. Astec AA13591, Model 699-0127, 230V 50/60HZ with date 8627, Revision 01.
What is : “Apple IIGS Vegas PVT” ?
PVT stands either “Prototype Version Test” or “Production Validation Testing” simply meaning revision ment for testing and product/software developemtn before actual production started.
Vegas was development name for Apple IIGS – but also various other codenames while the new system was being developed including: “Phoenix”, “Rambo”, “Gumby”, and “Cortland”.”
Few different board types were used during the “Cortland” project :
1985 Cortland board was blue, no SKA321-03 marking close to memory chips on right side.
1986 Cortland board was green, with SKA321-03 marked close to memory chips on right side.
The case and serial number:
The case seems to be early, regular IIGS production model.
The back seems to be standard as well.
Model : A2S6000W (Wonder what the “W” stands for?)
Serial number: C63800JA2F6000 (Wonder what the “F” stands for?)
If i figured this out correctly then it would mean :
C 6 38 00J A2F6000
J = 18
0018 (unit no)
Compared to regular Ireland made GS, serial : CK9120PLA2S6000 (Year 1989, Week 12, Unit 802, ROM01) does not have “sticker” but it’s pressed to plastic directly – serial number part itself, is a small sticker. The ones made in 1987 have the same type of layout as well.
The main logic board:
SKA321-03 board layout.
Close up: the motherboard pcb is green with “SKA321-03” printed in yellow below the are where the FAST RAM chips are.
Close up: while the normal production revision the same position reads “Apple //GS”.
The VGC is soldered into the main board, not socketed – just like early ROM0 boards.
Date on board : P8615 (next to SKA321-03)
P8615 is : 15/1986 (week/year) 7-14. April 1986
Close to barcone : 351 (very faint)
Close to barconde : 8618 (left side)
Code on board : 6xx-xxxx-A (top right next to slot 7)
Chip dates and codes:
CPU : C65SC8160-4 / G8549
RAM : 8531 (all)
Audio – Ensoniq ES5503 : 343-0051-A / 8701
Sound GLU : 344S0052-1 / 8605
MEGA II : 344S-0047
VGC : 343S-0046-1 / 8611
KBD GLU : 344-S-0048
FPI : 344S0050-1 / 8641
ROM code & version : 342-0077-B / 8727 (ROM01)
Codes for early ROM are:
341-0077-A = ROM BF (=addon extension-board with 4 x 27C256 EPROM)
342-0077-A = ROM 00 (September 1986 – August 1987)
342-0077-B = ROM 01 (September 1987 – July 1989)
I’ve reason to believe when this unit was produced it came with the ROM BF. The case was obiously swapped later on – as it most likely originally came in //e case.
Serial number decoder:
Apple IIGS serial numbers list : https://docs.google.com/spreadsheets/d/1UB9TyF1h3mDyUXQgGm3Z7gxENAGOTFwL1fwLySoBRyU/edit#gid=1
FinApple 2020 (c)
Apple II Forever.