7800 Chips

There is 6502C cpu inside, running on 1.79 MHz most of the time.
Because 7800 is hybrid machine, it has two main chips: Maria (7800 mode) and old 2600's TIA (2600 mode). These two are responsible for graphics output, TIA also for sound.
For additional 128bytes of RAM, input/output ports and timers, there's RIOT chip.
Operating system is stored in ROMs.
Various other stuff is described here.
System boards and their layout is given here.

Following is the list of the released models of 7800. If you want to help me make this list complete, open your console and report me:

- the model and its TV norm
- all the COxxxxx numbers on all the parts (Uxx number, manufacturer, date YYWW)
- don't forget to add crystal values and C0xxxx numbers
- all the numbers on the board
- number of memory chips (if they're on additional board)
- all the connectors, switches etc.

Mitch's 7800, NTSC
Manufactured 84/7. All major chips socketed, expansion

    board C025233-001 REV A 8427
    cpu C014806C-29 8405
    maria C024674-30
    tia C010444D-01 C04075 8415
    riot C010750-03 8415
    os C024922B-29 8422
    ram MCM61L16P15 8351
    crystal C024912
    modulator C398012-001

Mitch's newer 7800, NTSC
Manufactured 88/9. Nothing socketed, expansion not installed, one capacitor on the bottom

    board C025233-002 REV B CA025234 8832
    cpu C014806-35
    maria C025349-001
    tia C010444-31
    riot UM6532 8838
    os C024922B-29 8835
    ram UM6116-2 8839 (2x)
    crystal C024912-002
    modulator C024629

Mitch's 7800, french PAL
Manufactured 91/9. CPU & Maria socketed. SCART lead. RGB/RAM boards, 5 resistors on bottom of the board.

    board C300633-001 REV C, 9134
    cpu UMC UM6502I, 9136
    maria C025718-30, 9125
    tia C398052-001
    riot UMC UM6532, 9134
    os C300558-001
    ram board C300452 REV C, 9133
    ram HM6168HP-70, 8522/8513, 2x
    crystal 4.433618
    crystal 14.187576
    rgb board C301645-001 REV B, V7021 chip, 4.4333618 crystal

My 7800, civilized PAL
Manufactured 91/9. Nothing socketed, RAM board, two resistors on bottom of the board.

    board C300633-001 REV C, 9134
    cpu UMC UM6502I, 9137
    maria C025718-30, 9134
    tia C398052-001
    riot UMC UM6532, 9135
    os C300558-001B
    ram board C300452 REV B, 8832
    ram STC 2168, 8520, 2x
    crystal 4.433618
    crystal 14.187576
    modulator C398012-001

Back (c) 1998-2004 Jindroush Last modified: Tue Dec 10 22:03:32 2002