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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

content/museum/ohio-scientific-model-500.md

@@ -0,0 +1,77 @@
+---
+title: OHIO Scientific MODEL 500
+categories:
+- Computers
+types:
+- Home Computer
+origins:
+- U.S.A.
+years:
+- '1977'
+cpus:
+- '6502'
+params:
+  name: MODEL 500
+  company: /companies/ohio-scientific
+  company_name: OHIO Scientific
+  specs:
+  - label: NAME
+    value: MODEL 500
+  - label: MANUFACTURER
+    value: OHIO Scientific
+  - label: TYPE
+    value: Home Computer
+  - label: ORIGIN
+    value: U.S.A.
+  - label: YEAR
+    value: '1977'
+  - label: CPU
+    value: '6502'
+  - label: SPEED
+    value: 1 MHz.
+  - label: RAM
+    value: 4 KB
+  - label: ROM
+    value: 8 KB
+  - label: TEXT MODES
+    value: 24 chars. x 24(?) lines
+  - label: GRAPHIC MODES
+    value: None
+  - label: COLORS
+    value: Monochrome
+  - label: I/O PORTS
+    value: Tape, Monitor, 1 expansion slot
+  - label: PRICE
+    value: 'Model 500: $298 - SuperKit: $398'
+  tabs:
+  - photos
+  photos:
+  - title: THE MODEL 500 SUPERKIT
+    subtitle: ''
+    text: 'The Superkit is a kit with several boards : an expansion board with 8 slots, the Model 500 board and a card called Model 440 Video I/O board. This card provides CRT functions and a keyboard connector.'
+    image: null
+  - title: MODEL 500-1
+    subtitle: ''
+    text: ''
+    image: null
+  comments:
+  - author: daniel (france)
+    date: Friday 25th July 2003
+    text: |-
+      please i searche the spar part for this computer\
+      osi (505 board and os65 v.3.3)\
+      \~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~
+  oc_id: 49
+  source:
+    url: https://web.archive.org/web/20230327103016/http://www.old-computers.com/museum/computer.asp?c=49
+    date: '2023-03-27'
+---
+
+This board was used as a motherboard for the [Challenger II](/museum/ohio-scientific-challenger-ii/).
+
+Three Model 500 versions were sold:\
+**500**: The board.\
+**500-1**: Fully enclosed board with power supply, reset switch and two standard terminal connectors.\
+**500-8**: A 500 board in an eight slot Challenger case with power supply.
+
+OHIO Scientific presented later an enhanced version called **SuperKit**. It was a 3 board-set with a Model 500 board without the serial interface, a video board, a 8 slot backplane board and a modified version of the BASIC ROM allowing a direct use of the video board. A TV set could be used with an optional RF aerial modulator