AC,

If you can find a book by Keith Mathison titled Given For You I think you will find it most helpful on what Calvin's beliefs were. I do know Mathison wrote this about Calvin's views on the Eucharist:
Quote
Wallace provides a helpful summary of the various aspects of Calvin's thought. He reminds us, first of all, that Calvin agrees with the Lutherans and the Roman Catholics "that the flesh of Christ is given in the sacrament." This is repeatedly emphasized throughout Calvin's works. In fact, Calvin asserts, "the whole of Christ is given in the sacrament." This is necessary, according to Calvin, because the flesh of Christ is the channel of the life that belongs inherently to the divine nature." Wallace points out four basic points in Calvin's eucharistic doctrine that must be kept in mind as we next consider the mode of partaking of Christ's body and blood:
(i) The body of Christ, in which he wrought our redemption and apart from which we cannot be saved, in being communicated to us in the sacrament remains, throughout the participation, in heaven, beyond this world, and retains all its human properties...
(ii) Communion with the body of Christ is effected through the descent of the Holy Spirit, by whom our souls are lifted up to heaven, there to partake of the life transfused into us from the flesh of Christ...
(iii) Partaking of the flesh of Christ in the supper is thus a heavenly action, in which the flesh is eaten in a spiritual manner...
(iv) The presence of the body of Christ in the Supper, though it may be called a real presence and a descent of Christ by the Spirit, is nevertheless also a "celestial mode of presence" and leads to no localisation of the body of Christ on earth, no inclusion of it in the elements, no attachment of it to the elements...

Perhaps this will be of some help.

Theo