AdventureVision cartridge

ADVENTUREVISION [WIKI]

AdventureVision cartridges

All four original AdventureVision cartridges only consist of a single chip without any pcb around it. It is a 4 kilobytes 2532 Eprom bent around a molex connector which is clipped into a plastic housing.

2532 Eprom

Chip features

  • Organization: 4096 x 8
  • Single +5V Power Supply
  • All Inputs/Outputs Fully TTL Compatible
  • Static Operation (No Clocks, No Refresh)
  • Max Access/Min Cycle Time: 300ns
  • 8–Bit Output for Use in Microprocessor Based Systems
  • N–Channel Silicon–Gate Technology
  • 3–State Output Buffers
  • Low Power Dissipation:
    • Active – 400mW Typical
    • Standby – 100mW Standby
  • Guaranteed DC Noise Immunity with Standard TTL Loads
  • No Pull–Up Resistors Required

Pinout diagram
The 2532 Eprom pinout is as follows:
        _________
 A7 [ 1|   \_/   |24] Vcc
 A6 [ 2|         |23] A8
 A5 [ 3|         |22] A9
 A4 [ 4|         |21] Vpp
 A3 [ 5|    2    |20] PD/nPGM
 A2 [ 6|    5    |19] A10
 A1 [ 7|    3    |18] A11
 A0 [ 8|    2    |17] Q8
 Q1 [ 9|         |16] Q7
 Q2 [10|         |15] Q6
 Q3 [11|         |14] Q5
Vss [12|_________|13] Q4

Using Eeproms (28C64)
The most common and available type of eeprom with at least 4kb is the 8kb 28C64, mostly as 28C64A, 28C64B, 28C64C or 28C64D.

Chip features

  • Fast Read Access Time—150 ns
  • CMOS Technology for Low Power Dissipation
    • 30 mA Active
    • 100 uA Standby
  • Fast Byte Write Time—200 us or 1 ms
  • Data Retention >200 years
  • High Endurance – Minimum 100,000 Erase/Write Cycles
  • Automatic Write Operation
    • Internal Control Timer
    • Auto-Clear Before Write Operation
    • On-Chip Address and Data Latches
  • Data Polling
  • Ready/Busy
  • Chip Clear Operation
  • Enhanced Data Protection
    • VCC Detector
    • Pulse Filter
    • Write Inhibit
  • Electronic Signature for Device Identificatio
  • 5-Volt-Only Operation
  • Organized 8Kx8 JEDEC Standard Pinout
    • 28-pin Dual-In-Line Package
    • 32-pin PLCC Package
    • 28-pin SOIC Package
  • Available for Extended Temperature Ranges:
    • Commercial: 0°C to +70°C
    • Industrial:-40°C to +85°C

Pinout diagram
The 28C64 Eeprom pinout is as follows:
             _________
RDY/nBSY [ 1|   \_/   |28] Vcc
     A12 [ 2|         |27] nWE
      A7 [ 3|         |26] NC
      A6 [ 4|         |25] A8
      A5 [ 5|    2    |24] A9
      A4 [ 6|    8    |23] A11
      A3 [ 7|    C    |22] nOE
      A2 [ 8|    6    |21] A10
      A1 [ 9|    4    |20] nCE
      A0 [10|    A    |19] I/O7
    I/O0 [11|         |18] I/O6
    I/O1 [12|         |17] I/O5
    i/O2 [13|         |16] I/O4
     Vss [14|_________|15] I/O3

Making an adapter
An adapter for using the 28C64 as a replacement for 2532 has to be wired as follows:
           ____ _        28C64         _ ____
RDY/nBSY [|                              +-  |] Vcc
+--- A12 [|            _________         +-  |] nWE
|     A7 [|  ---  A7 [|   \_/   |] Vcc  -+-  |] NC
|     A6 [|  ---  A6 [|         |] A8   ---  |] A8
|     A5 [|  ---  A5 [|         |] A9   ---  |] A9
|     A4 [|  ---  A4 [|       +--------------|] A11
|     A3 [|  ---  A3 [|    2  | |] nPGM ---  |] nOE --+
|     A2 [|  ---  A2 [|    5  | |] A10  ---  |] A10   |
|     A1 [|  ---  A1 [|    3  +--- A11       |] nCE --+
|     A0 [|  ---  A0 [|    2    |] Q8   ---  |] I/O7
|   I/O0 [|  ---  Q1 [|         |] Q7   ---  |] I/O6
|   I/O1 [|  ---  Q2 [|         |] Q6   ---  |] I/O5
|   i/O2 [|  ---  Q3 [|         |] Q5   ---  |] I/O4
+--- Vss [|_ --- Vss [|_________|] Q4   --- _|] I/O3

Pin 1 of 28C64 (RDY/nBSY) and pin 21 of 2532 (VPP) are NOT connected! There is a total of 4 patches required. Connecting pin 2 (A12) of 28C64 to GND will limit it to lower 4kb.

Downloads
2532 eprom datasheet (contains all 2532 information)
25C64A eprom datasheet (contains all 28C64 information)