Tiny Eprommer

From C64-Wiki
Jump to: navigation, search
Tiny Eprommer
TinyEprommer
Type: -
Producer: N/A
Price: N/A
Released: 1984
Discontinued: -
Processor: -
Memory: -
OS: -
Info: Tiny-EPROMer - as seen in 64'er Magazine, special issue 84.

Tiny-EPROMer is a C64 hardware device that creates (or ‘burns’) EPROMs (Erasable Programmable Read-Only Memory). It first appeared as an electronics project in 64'er Magazine, special issue 84[1]. It plugs into the C64 user / joystick ports. The accompanying software displays text in English or German.


EPROMs[edit]

EPROM

EPROMs have advantages over other types of storage:

  • Boot instantly — no waiting for a tape to load.
  • Permanent storage that keeps data when powered off.
  • Unlike ROMs, EPROMs are rewriteable. (EPROM wiping uses ultraviolet light. Removable tape protects EPROMs from the ultraviolet in sunlight).


Usage[edit]

Modded Kernal

EPROMs allow C64 hackers to conveniently create their own custom bootable kernals (known as ‘modding’). One popular use for this technique is customizing the C64 start-up screen text and colors.

As well as modding, EPROMs also allow instant booting between alternative kernals (example: a stock C64 kernal / JiffyDOS). The original C64 kernal ROM is replaced by a device such as a Switchless Kernal or Dual Kernal adapter (available online) and two EPROMs. During boot, the 'restore' button switches between the C64 kernal / JiffyDOS.


Software[edit]

Tiny-Eprommer Software

Tiny-EPROMer software is available online from:

http://plus4world.powweb.com/software/Tiny_EPROMer_V2_0

Title:          Tiny-EPROMer V2.0
Category:       Utility/EPROM
Release Date:   Unknown
Language:       German
Size:           16K
Machine:        PAL & NTSC
Code Type:      Basic
Distribution:   Freeware
Notes:          Original by Rüdiger Stahl, converted by The Luser.


PCB[edit]

A PCB layout is available online from:

http://lc64.blogspot.com/2014/05/pcb-for-tiny-eprommer-2.html

Schematic[edit]

A full schematic is available online from:

https://www.commodoreserver.com/CommodorePhotoDetails.asp?PID=DE61E00A4B5C48E68FB8616174CA9543

Alternatives[edit]

Versa64cart

Tiny-EPROMer is over 30 years old, and more convenient alternatives now exist for burning / managing / booting EPROMs, including the versa64cart:

http://c64os.com/post/versa64cart

Links[edit]

References[edit]

  1. 64'er magazine special issue 84: "Hardware; u.a. zum Selbstbau: Floppy-Speeder, 8-Kanal-Schaltinterface"